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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<!-- 2022-W11-4 02:12 -->
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>system/b</title>
<meta name="author" content="Inanna" />
<meta name="description" content="A simple memory-to-memory virtual machine implemented in C++." />
<meta name="generator" content="Org Mode" />
<link href="/site.css" rel="stylesheet" type="text/css" /><link href="images/website-icon.png" rel="icon" />
</head>
<body>
<div id="preamble" class="status">
<div><a href="/index.html"><img alt="An abstract logo representing a series of three assembly line stamping machines with the words CONS, DEV, and embalzoned in white on each machine." id="site-logo" src="/images/website-logo.png" /></a></div>
</div>
<div id="content" class="content">
<h1 class="title">system/b
<br />
<span class="subtitle">A modern computing system.</span>
</h1>
<div id="table-of-contents" role="doc-toc">
<h2>Table of Contents</h2>
<div id="text-table-of-contents" role="doc-toc">
<ul>
<li><a href="#orga2bd7e5">Introduction</a></li>
<li><a href="#orga54f3a6">Example Programs</a>
<ul>
<li><a href="#org8e2cd13">mult.sba</a></li>
<li><a href="#org14f9cc7">subEX.sba</a></li>
</ul>
</li>
<li><a href="#orgca9234c">Source Code</a>
<ul>
<li><a href="#orgfd32513">systemBshell.cpp</a></li>
<li><a href="#orgddb254e">SystemBvm.h</a></li>
<li><a href="#org3d05a37">ioStrings.h</a></li>
<li><a href="#org559422c">assembler.h</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-orga2bd7e5" class="outline-2">
<h2 id="orga2bd7e5">Introduction</h2>
<div class="outline-text-2" id="text-orga2bd7e5">
<p>
Another project from my early days in programming <label class="sidenote-number" for="1"><sup>1</sup></label><input checked="checked" id="1" style="display:none" type="checkbox" /><span class="sidenote"><span class="sidenote-number"> 1</span> About three years ago now, wow! Amazing how time flies.</span>, a simple memory-to-memory virtual machine written in C++. I currently intend to upgrade it a bit eventually with interrupt codes, though maybe I will wait until I write a proper LISP machine with tagged memory / typed instructions. To compile it simply run GCC on systemBshell.cpp.
</p>
</div>
</div>
<div id="outline-container-orga54f3a6" class="outline-2">
<h2 id="orga54f3a6">Example Programs</h2>
<div class="outline-text-2" id="text-orga54f3a6">
</div>
<div id="outline-container-org8e2cd13" class="outline-3">
<h3 id="org8e2cd13">mult.sba</h3>
<div class="outline-text-3" id="text-org8e2cd13">
<div class="org-src-container">
<pre class="src src-asm"><span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">this is a program that finds c for ;</span>
<span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">a * b = c ;</span>
<span style="font-weight: bold; font-style: italic;">JIE</span> <span style="color: #E53935; font-style: italic;">05</span> 07 04 <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x00 jumps to the stop instruction if the counter equals a</span>
<span style="font-weight: bold; font-style: italic;">ADD</span> <span style="color: #E53935; font-style: italic;">06</span> 254 254 <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x01 adds b to c and places it in c</span>
<span style="font-weight: bold; font-style: italic;">ADD</span> <span style="color: #E53935; font-style: italic;">07</span> 082 07 <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x02 increments the counter up by one</span>
<span style="font-weight: bold; font-style: italic;">JMP</span> <span style="color: #E53935; font-style: italic;">00</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x03 jumps to address 0x00</span>
<span style="font-weight: bold; font-style: italic;">STP</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x04 stop instruction</span>
<span style="font-weight: bold; font-style: italic;">3</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x05t a</span>
<span style="font-weight: bold; font-style: italic;">256</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x06 b</span>
<span style="font-weight: bold; font-style: italic;">0</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x07 counter</span>
<span style="font-weight: bold; font-style: italic;">1</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x08 storage for 1</span>
</pre>
</div>
</div>
</div>
<div id="outline-container-org14f9cc7" class="outline-3">
<h3 id="org14f9cc7">subEX.sba</h3>
<div class="outline-text-3" id="text-org14f9cc7">
<div class="org-src-container">
<pre class="src src-asm"><span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">this is a program that finds c for ;</span>
<span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">a - b = c ;</span>
<span style="font-weight: bold; font-style: italic;">FLP</span> <span style="color: #E53935; font-style: italic;">4</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x00 this flips the value a</span>
<span style="font-weight: bold; font-style: italic;">ADD</span> <span style="color: #E53935; font-style: italic;">4</span> 5 4 <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x01 this adds one to a</span>
<span style="font-weight: bold; font-style: italic;">ADD</span> <span style="color: #E53935; font-style: italic;">3</span> 4 6 <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x02 this adds a to b, and places the ansewer c in address 0x6</span>
<span style="font-weight: bold; font-style: italic;">0</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x03 this stores the value a</span>
<span style="font-weight: bold; font-style: italic;">0</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x04 this stores the value of b</span>
<span style="font-weight: bold; font-style: italic;">1</span> <span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x05 this is where the one is stored for the add one operation</span>
<span style="color: #a4a4a4; font-style: italic;">; </span><span style="color: #a4a4a4; font-style: italic;">0x06 this is where the value c will go</span>
</pre>
</div>
</div>
</div>
</div>
<div id="outline-container-orgca9234c" class="outline-2">
<h2 id="orgca9234c">Source Code</h2>
<div class="outline-text-2" id="text-orgca9234c">
</div>
<div id="outline-container-orgfd32513" class="outline-3">
<h3 id="orgfd32513">systemBshell.cpp</h3>
<div class="outline-text-3" id="text-orgfd32513">
<div class="org-src-container">
<pre class="src src-C++"><span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">iostream</span><span style="color: #494949;">></span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">string</span><span style="color: #494949;">></span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;">"ioStrings.h"</span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;">"assembler.h"</span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;">"SystemBvm.h"</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> * This is the system/b "shell" allows the user to interact with it. Feel free to write your own if you want.</span>
<span style="color: #a4a4a4; font-style: italic;"> * note : the shell is not complete and needs more work to add full functionality to system/b</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">int</span> <span style="font-weight: bold; font-style: italic;">main</span><span style="color: #494949;">()</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">quit</span> = <span style="color: #E53935;">false</span>;
<span style="color: #E53935;">SystemBvm1024</span> <span style="font-style: italic;">vm</span>;
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">cmdInput</span>,
<span style="font-style: italic;">command</span>,
<span style="font-style: italic;">argument1</span>,
<span style="font-style: italic;">argument2</span>;
<span style="color: #E53935;">std</span>::cout << welcomeText<span style="color: #bbb;">()</span>;
<span style="color: #E53935; font-style: italic;">do</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cin.clear<span style="color: #494949;">()</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"system/b> "</span>; <span style="color: #E53935;">std</span>::cin >> command;
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>command == <span style="color: #494949;">"m"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935;">std</span>::cout << manualText<span style="color: #bbb;">()</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #E53935;">std</span>::endl;
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"assemble"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"a"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"inFile> "</span>; <span style="color: #E53935;">std</span>::cin >> argument1;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"outFile> "</span>; <span style="color: #E53935;">std</span>::cin >> argument2;
assemble<span style="color: #494949;">(</span>argument1, argument2<span style="color: #494949;">)</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"file assembled sucessfully "</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">std</span>::cout << <span style="color: #E53935;">std</span>::endl;
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"boot"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"b"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"inFile> "</span>; <span style="color: #E53935;">std</span>::cin >> argument1;
vm.boot<span style="color: #494949;">(</span>argument1<span style="color: #494949;">)</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"boot completed "</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"immDump"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"imm"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
vm.immDump<span style="color: #494949;">()</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"imm dump completed "</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"immDump"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"idr"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
vm.idrDump<span style="color: #494949;">()</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"idr dump completed "</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"stepCycle"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"sc"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
vm.stepCycle<span style="color: #494949;">()</span>;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"cycle step completed "</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"checkCounter"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"cc"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"current instruction counter : "</span> << vm.getinstructionCounter<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"getOutput"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"go"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"output address contains : "</span> << vm.getOutput<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"setInput"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"si"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">try</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cin >> argument1;
vm.setInput<span style="color: #494949;">(</span>argument1<span style="color: #494949;">)</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">catch</span> <span style="color: #bbb;">(</span><span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">std</span>::<span style="color: #E53935;">invalid_argument</span>& <span style="font-style: italic;">e</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::cout << e.what<span style="color: #494949;">()</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #bbb;">(</span>command == <span style="color: #494949;">"quit"</span><span style="color: #bbb;">)</span> || <span style="color: #bbb;">(</span>command == <span style="color: #494949;">"q"</span><span style="color: #bbb;">)</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
quit = <span style="color: #E53935;">true</span>;
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935;">std</span>::cout << errorText<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #bbb;">}</span> <span style="color: #E53935; font-style: italic;">while</span> <span style="color: #bbb;">(</span><span style="color: #000; font-weight: bold;">!</span>quit<span style="color: #bbb;">)</span>;
<span style="color: #E53935;">std</span>::cout << quitText<span style="color: #bbb;">()</span>;
<span style="color: #E53935; font-style: italic;">return</span> 0;
<span style="color: #494949;">}</span>
</pre>
</div>
</div>
</div>
<div id="outline-container-orgddb254e" class="outline-3">
<h3 id="orgddb254e">SystemBvm.h</h3>
<div class="outline-text-3" id="text-orgddb254e">
<div class="org-src-container">
<pre class="src src-C++"><span style="color: #000; font-weight: bold;">#pragma</span> once
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">fstream</span><span style="color: #494949;">></span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">iostream</span><span style="color: #494949;">></span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">cmath</span><span style="color: #494949;">></span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> * This is the basic system\b vm with 1024 possible indirectly addressed locations in memory. The addresses FD and FE are used for input and output, repsectively</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">WORD_SIZE</span> = 32;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">IMM_ADDR_SPACE_SIZE</span> = 256;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">unsigned</span> <span style="color: #E53935;">int</span> <span style="font-style: italic;">IDR_ADDR_SPACE_SIZE</span> = 1024;
<span style="color: #E53935; font-style: italic;">class</span> <span style="color: #E53935;">SystemBvm1024</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">private</span>:
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">immediateAddressSpace</span><span style="color: #bbb;">[</span>IMM_ADDR_SPACE_SIZE<span style="color: #bbb;">][</span>WORD_SIZE<span style="color: #bbb;">]</span>;
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">indirectAddressSpace</span><span style="color: #bbb;">[</span>IDR_ADDR_SPACE_SIZE<span style="color: #bbb;">][</span>WORD_SIZE<span style="color: #bbb;">]</span>;
<span style="color: #E53935;">short</span> <span style="font-style: italic;">instructionCounter</span>;
<span style="color: #E53935;">short</span> <span style="font-weight: bold; font-style: italic;">addressToShort</span><span style="color: #bbb;">(</span><span style="color: #E53935;">short</span> <span style="font-style: italic;">start</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">short</span> <span style="font-style: italic;">address</span> = 0;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 8; i > 0; i--<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>immediateAddressSpace<span style="color: #494949;">[</span>instructionCounter<span style="color: #494949;">][</span>i + start - 1<span style="color: #494949;">]</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
address += pow<span style="color: #494949;">(</span>2,<span style="color: #bbb;">(</span>8 - i<span style="color: #bbb;">)</span><span style="color: #494949;">)</span>;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">return</span> address;
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">unsigned</span> <span style="color: #E53935;">int</span> <span style="font-weight: bold; font-style: italic;">addrToInt</span><span style="color: #bbb;">(</span><span style="color: #E53935;">short</span> <span style="font-style: italic;">addr</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">unsigned</span> <span style="color: #E53935;">int</span> <span style="font-style: italic;">address</span> = 0;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = WORD_SIZE; i > 0; i--<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>immediateAddressSpace<span style="color: #494949;">[</span>instructionCounter<span style="color: #494949;">][</span>i - 1<span style="color: #494949;">]</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
address += pow<span style="color: #494949;">(</span>2, <span style="color: #bbb;">(</span>8 - i<span style="color: #bbb;">)</span><span style="color: #494949;">)</span>;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">return</span> address;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : JIE</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1010</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> JIE [argument address] [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> jumps to the third argument address if the value of the first argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address equals the second argumet address</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">JIE</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">addrEquality</span> = <span style="color: #E53935;">true</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr0</span> = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr1</span> = addressToShort<span style="color: #494949;">(</span>16<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr2</span> = addressToShort<span style="color: #494949;">(</span>24<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>immediateAddressSpace<span style="color: #494949;">[</span>argAddr0<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> != immediateAddressSpace<span style="color: #494949;">[</span>argAddr1<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
addrEquality = <span style="color: #E53935;">false</span>;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">if</span><span style="color: #494949;">(</span>addrEquality<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
instructionCounter = argAddr2;
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #494949;">{</span>
instructionCounter++;
<span style="color: #494949;">}</span>
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : JMP</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 0101</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> JMP [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> unconditionally jumps to the argument address provided</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">JMP</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
instructionCounter = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : MOV</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1100</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> MOV [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> copies the value stored in the first argument address to the second argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address unconditionally</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">MOV</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr0</span> = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr1</span> = addressToShort<span style="color: #494949;">(</span>16<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
immediateAddressSpace<span style="color: #bbb;">[</span>argAddr1<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span> = immediateAddressSpace<span style="color: #bbb;">[</span>argAddr0<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
<span style="color: #494949;">}</span>
instructionCounter++;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : ADD</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1011</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> ADD [argument address] [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> adds the contents of the first argument address to the second argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address and then places the result in the third argument address</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">ADD</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr0</span> = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr1</span> = addressToShort<span style="color: #494949;">(</span>16<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr2</span> = addressToShort<span style="color: #494949;">(</span>24<span style="color: #494949;">)</span>;
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">carry</span> = <span style="color: #E53935;">false</span>,
<span style="font-style: italic;">bit0</span> = <span style="color: #E53935;">false</span>,
<span style="font-style: italic;">bit1</span> = <span style="color: #E53935;">false</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = WORD_SIZE; i >= 0; i--<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
bit0 = immediateAddressSpace<span style="color: #bbb;">[</span>argAddr0<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
bit1 = immediateAddressSpace<span style="color: #bbb;">[</span>argAddr1<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span><span style="color: #494949;">(</span>bit0 + bit1 == 1<span style="color: #494949;">)</span> && <span style="color: #494949;">(</span>carry == 0<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>argAddr2<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 1;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"1"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span><span style="color: #494949;">(</span>bit0 + bit1 == 0<span style="color: #494949;">)</span> && <span style="color: #494949;">(</span>carry == 1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>argAddr2<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 1;
carry = 0;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"2"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>bit0 + bit1 + carry == 0<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>argAddr2<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 0;
carry = 0;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"3"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>bit0 + bit1 + carry == 2<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>argAddr2<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 0;
carry = 1;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"4"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>bit0 + bit1 + carry == 3<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>argAddr2<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 1;
carry = 1;
<span style="color: #E53935;">std</span>::cout << <span style="color: #494949;">"5"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935;">std</span>::cout << <span style="color: #E53935;">std</span>::endl;
<span style="color: #E53935;">std</span>::cout << argAddr0 << <span style="color: #494949;">"::"</span> << argAddr1 << <span style="color: #494949;">"::"</span> << argAddr2 << <span style="color: #E53935;">std</span>::endl;
instructionCounter++;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : FLP</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 0100</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> FLP [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> flips the bits in the argument address provided</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">FLP</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr0</span> = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
immediateAddressSpace<span style="color: #bbb;">[</span>argAddr0<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span> = <span style="color: #000; font-weight: bold;">!</span>immediateAddressSpace<span style="color: #bbb;">[</span>argAddr0<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
<span style="color: #494949;">}</span>
instructionCounter++;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : RED</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1101</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> RED [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> special instruction, reads the value located in the directly addressed</span>
<span style="color: #a4a4a4; font-style: italic;"> space to the second argument address, the first argument address provides</span>
<span style="color: #a4a4a4; font-style: italic;"> the pointer to the location of the data in the directly addressed space</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">RED</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr0</span> = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr1</span> = addressToShort<span style="color: #494949;">(</span>16<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">unsigned</span> <span style="color: #E53935;">int</span> <span style="font-style: italic;">idrAddr</span> = addrToInt<span style="color: #494949;">(</span>argAddr0<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
immediateAddressSpace<span style="color: #bbb;">[</span>argAddr1<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span> = indirectAddressSpace<span style="color: #bbb;">[</span>idrAddr<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
<span style="color: #494949;">}</span>
instructionCounter++;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : WRT</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 0010</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> WRT [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> special instruction, writes the value located in the second argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address to an address located in the directly addressed space, the first</span>
<span style="color: #a4a4a4; font-style: italic;"> argument address provides the pointer to the location of the data in the</span>
<span style="color: #a4a4a4; font-style: italic;"> directly addresssed space</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">WRT</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr0</span> = addressToShort<span style="color: #494949;">(</span>8<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">short</span> <span style="font-style: italic;">argAddr1</span> = addressToShort<span style="color: #494949;">(</span>16<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">const</span> <span style="color: #E53935;">unsigned</span> <span style="color: #E53935;">int</span> <span style="font-style: italic;">idrAddr</span> = addrToInt<span style="color: #494949;">(</span>argAddr0<span style="color: #494949;">)</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
indirectAddressSpace<span style="color: #bbb;">[</span>idrAddr<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span> = immediateAddressSpace<span style="color: #bbb;">[</span>argAddr1<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
<span style="color: #494949;">}</span>
instructionCounter++;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : STP</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1111</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> STP</span>
<span style="color: #a4a4a4; font-style: italic;"> Stops the execution of code by system/b</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">STP</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">public</span>:
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">stepCycle</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">i0</span>, <span style="font-style: italic;">i1</span>, <span style="font-style: italic;">i2</span>, <span style="font-style: italic;">i3</span>;
i0 = immediateAddressSpace<span style="color: #494949;">[</span>instructionCounter<span style="color: #494949;">][</span>4<span style="color: #494949;">]</span>;
i1 = immediateAddressSpace<span style="color: #494949;">[</span>instructionCounter<span style="color: #494949;">][</span>5<span style="color: #494949;">]</span>;
i2 = immediateAddressSpace<span style="color: #494949;">[</span>instructionCounter<span style="color: #494949;">][</span>6<span style="color: #494949;">]</span>;
i3 = immediateAddressSpace<span style="color: #494949;">[</span>instructionCounter<span style="color: #494949;">][</span>7<span style="color: #494949;">]</span>;
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">JIE</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>i0 && <span style="color: #000; font-weight: bold;">!</span>i1 && i2 && <span style="color: #000; font-weight: bold;">!</span>i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
JIE<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">JMP</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #000; font-weight: bold;">!</span>i0 && i1 && <span style="color: #000; font-weight: bold;">!</span>i2 && i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
JMP<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">MOV</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>i0 && i1 && <span style="color: #000; font-weight: bold;">!</span>i2 && <span style="color: #000; font-weight: bold;">!</span>i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
MOV<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">ADD</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>i0 && <span style="color: #000; font-weight: bold;">!</span>i1 && i2 && i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
ADD<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">FLP</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #000; font-weight: bold;">!</span>i0 && i1 && <span style="color: #000; font-weight: bold;">!</span>i2 && <span style="color: #000; font-weight: bold;">!</span>i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
FLP<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">RED</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>i0 && i1 && <span style="color: #000; font-weight: bold;">!</span>i2 && i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
RED<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">WRT</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span><span style="color: #000; font-weight: bold;">!</span>i0 && <span style="color: #000; font-weight: bold;">!</span>i1 && i2 && <span style="color: #000; font-weight: bold;">!</span>i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
WRT<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">//</span><span style="color: #a4a4a4; font-style: italic;">STP</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>i0 && i1 && i2 && i3<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
STP<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #494949;">{</span>
instructionCounter++;
<span style="color: #494949;">}</span>
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">writeInput</span><span style="color: #bbb;">(</span><span style="color: #E53935;">bool</span> <span style="font-style: italic;">input</span><span style="color: #494949;">[</span>WORD_SIZE<span style="color: #494949;">]</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
input<span style="color: #bbb;">[</span>i<span style="color: #bbb;">]</span> = immediateAddressSpace<span style="color: #bbb;">[</span>254<span style="color: #bbb;">][</span>i<span style="color: #bbb;">]</span>;
<span style="color: #494949;">}</span>
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-weight: bold; font-style: italic;">getOutput</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">output</span> = <span style="color: #494949;">""</span>;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>immediateAddressSpace<span style="color: #494949;">[</span>254<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
output += <span style="color: #494949;">"1"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #bbb;">{</span>
output += <span style="color: #494949;">"0"</span>;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">return</span> output;
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">setInput</span><span style="color: #bbb;">(</span><span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">input</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < WORD_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>input<span style="color: #494949;">[</span>i<span style="color: #494949;">]</span> == <span style="color: #494949;">'1'</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>253<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 1;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>253<span style="color: #494949;">][</span>i<span style="color: #494949;">]</span> = 0;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">short</span> <span style="font-weight: bold; font-style: italic;">getinstructionCounter</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">return</span> instructionCounter;
<span style="color: #bbb;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/* </span>
<span style="color: #a4a4a4; font-style: italic;"> * this is a dummy bootloader designed to clear the immediately addressable space and load the </span>
<span style="color: #a4a4a4; font-style: italic;"> * relevant system/b machine code file into the immediately addressable file space</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">boot</span><span style="color: #bbb;">(</span><span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">filename</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">ifstream</span> <span style="font-style: italic;">inFile</span><span style="color: #494949;">(</span>filename<span style="color: #494949;">)</span>;
<span style="color: #E53935;">char</span> <span style="font-style: italic;">bit</span>;
instructionCounter = 0;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < IMM_ADDR_SPACE_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #bbb;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">j</span> = 0; j < WORD_SIZE; j++<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>i<span style="color: #494949;">][</span>j<span style="color: #494949;">]</span> = 0;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < IMM_ADDR_SPACE_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #bbb;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">j</span> = 0; j < WORD_SIZE; j++<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
inFile >> bit;
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>inFile<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>bit == <span style="color: #494949;">'1'</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>i<span style="color: #494949;">][</span>j<span style="color: #494949;">]</span> = 1;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>bit == <span style="color: #494949;">'0'</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
immediateAddressSpace<span style="color: #494949;">[</span>i<span style="color: #494949;">][</span>j<span style="color: #494949;">]</span> = 0;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #494949;">{</span>
immediateAddressSpace<span style="color: #bbb;">[</span>i<span style="color: #bbb;">][</span>j<span style="color: #bbb;">]</span> = 0;
<span style="color: #494949;">}</span>
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>
instructionCounter = 0;
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">immDump</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">ofstream</span> <span style="font-style: italic;">otFile</span><span style="color: #494949;">(</span><span style="color: #494949;">"immDump.txt"</span><span style="color: #494949;">)</span>;
otFile << <span style="color: #494949;">"current instruction counter : "</span> << instructionCounter << <span style="color: #E53935;">std</span>::endl;
otFile << <span style="color: #494949;">"Immediate Address Space State :"</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < IMM_ADDR_SPACE_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #bbb;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">j</span> = 0; j < WORD_SIZE; j++<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
otFile << immediateAddressSpace<span style="color: #494949;">[</span>i<span style="color: #494949;">][</span>j<span style="color: #494949;">]</span>;
<span style="color: #bbb;">}</span>
otFile << <span style="color: #494949;">" "</span> << i << <span style="color: #E53935;">std</span>::endl;
<span style="color: #494949;">}</span>
otFile.close<span style="color: #494949;">()</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">idrDump</span><span style="color: #bbb;">()</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">ofstream</span> <span style="font-style: italic;">otFile</span><span style="color: #494949;">(</span><span style="color: #494949;">"idrDump.txt"</span><span style="color: #494949;">)</span>;
otFile << <span style="color: #494949;">"current instruction counter : "</span> << instructionCounter << <span style="color: #E53935;">std</span>::endl;
otFile << <span style="color: #494949;">"indirect address space state : "</span> << <span style="color: #E53935;">std</span>::endl;
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #494949;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">i</span> = 0; i < IDR_ADDR_SPACE_SIZE; i++<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">for</span> <span style="color: #bbb;">(</span><span style="color: #E53935;">int</span> <span style="font-style: italic;">j</span> = 0; j < WORD_SIZE; j++<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
otFile << indirectAddressSpace<span style="color: #494949;">[</span>i<span style="color: #494949;">][</span>j<span style="color: #494949;">]</span>;
<span style="color: #bbb;">}</span>
otFile << <span style="color: #494949;">" "</span> << i << <span style="color: #E53935;">std</span>::endl;
<span style="color: #494949;">}</span>
otFile.close<span style="color: #494949;">()</span>;
<span style="color: #bbb;">}</span>
<span style="color: #494949;">}</span>;
</pre>
</div>
</div>
</div>
<div id="outline-container-org3d05a37" class="outline-3">
<h3 id="org3d05a37">ioStrings.h</h3>
<div class="outline-text-3" id="text-org3d05a37">
<p>
This is a file that I used to store functions that would return strings. Honestly I probably should have just had a file of constant functions, but these were the old days when I didn't know better and wanted everything to be "functional" regardless of how good an idea that was. <label class="sidenote-number" for="2"><sup>2</sup></label><input checked="checked" id="2" style="display:none" type="checkbox" /><span class="sidenote"><span class="sidenote-number"> 2</span> Be glad I have spared you from the worst of it where I wrote several C++ programs with only recursion and constants, no loops or mutable variables. I probably gave my algorithms teacher nightmares.</span> As a consequence I did things a bit weirdly.
</p>
<div class="org-src-container">
<pre class="src src-C++"><span style="color: #000; font-weight: bold;">#pragma</span> once
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">string</span><span style="color: #494949;">></span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-weight: bold; font-style: italic;">welcomeText</span><span style="color: #494949;">()</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">return</span>
<span style="color: #494949;">" __ __ __ \n"</span>
<span style="color: #494949;">" _______ _______/ /____ ____ ___ _/_/ / /_ \n"</span>
<span style="color: #494949;">" / ___/ / / / ___/ __/ _ \\/ __ `__ \\ _/_/ / __ \\\n"</span>
<span style="color: #494949;">" (__ ) /_/ (__ ) /_/ __/ / / / / / _/_/ / /_/ /\n"</span>
<span style="color: #494949;">"/____/\\__, /____/\\__/\\___/_/ /_/ /_/ /_/ /_.___/ \n"</span>
<span style="color: #494949;">" /____/ \n"</span>
<span style="color: #494949;">"a simple virtual machine\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>;
<span style="color: #494949;">}</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-weight: bold; font-style: italic;">errorText</span><span style="color: #494949;">()</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">return</span>
<span style="color: #494949;">"Invalid input, could not parse.\n"</span>
<span style="color: #494949;">"Abort, Retry, Fail?\n"</span>
<span style="color: #494949;">"\n"</span>;
<span style="color: #494949;">}</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-weight: bold; font-style: italic;">manualText</span><span style="color: #494949;">()</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">return</span>
<span style="color: #494949;">"system/b manual : \n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"system/b is an evolution on the earlier system/a virtual machine archictecture using\n"</span>
<span style="color: #494949;">"a similar 32 bit word size and word addressed memory, but now with direct addressing\n"</span>
<span style="color: #494949;">"allowing for a signifigant expansion in the size of programs that can be run by\n"</span>
<span style="color: #494949;">"system/b from 1024 bytes to up to 17179869184 bytes of code. This is divided between\n"</span>
<span style="color: #494949;">"the 1024 bytes of immediately addressed space and 17179869184 bytes of directly\n"</span>
<span style="color: #494949;">"addressed space. Direct addressing is conducted using the RED and WRT instructions. An\n"</span>
<span style="color: #494949;">"explination of the instructions used by system/b and their use is contained in the\n"</span>
<span style="color: #494949;">"\"instruction setsection\" of the system/b manual.\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"sections :\n"</span>
<span style="color: #494949;">"0 basic operation \\ shell commands\n"</span>
<span style="color: #494949;">"1 instruction set\n"</span>
<span style="color: #494949;">"2 debugging code\n"</span>
<span style="color: #494949;">"3 system implmentation\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"0 basic operation \\ shell commands :\n"</span>
<span style="color: #494949;">"command, alias | arguments | description \n"</span>
<span style="color: #494949;">"assemble, a | input_file(sba), output_file(sbm) | assembles the input file\n"</span>
<span style="color: #494949;">"manual, m | null | displays this manual\n"</span>
<span style="color: #494949;">"quit, q | null | quits the shell\n"</span>
<span style="color: #494949;">"boot, b | input_file(sbm) | boots the systm/b vm with\n"</span>
<span style="color: #494949;">" | | the code in the immediately\n"</span>
<span style="color: #494949;">" | | addressed space.\n"</span>
<span style="color: #494949;">"stepCycle, sc | null | steps the system/b vm one cycle\n"</span>
<span style="color: #494949;">"immDump, imm | null | dumps the immediately addressed\n"</span>
<span style="color: #494949;">" | | space to the file \"immDump.txt\"\n"</span>
<span style="color: #494949;">"idrDump, idr | null | dumps the indirectly addressed\n"</span>
<span style="color: #494949;">" | | space to the file \"idrDump.txt\"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"1 instruction set :\n"</span>
<span style="color: #494949;">"The system/b instruction set is a fixed width instructon set containing eight\n"</span>
<span style="color: #494949;">"instructions, MOV, ADD, FLP, JIE, JMP, RED, WRT and STP. All instructions except the\n"</span>
<span style="color: #494949;">"special instructions RED and WRT only access data from the immediately addressed space.\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"standard instruction format :\n"</span>
<span style="color: #494949;">"[instruction] [argument address] [argument address] [argument address]\n"</span>
<span style="color: #494949;">" JIE AB 10 23 \n"</span>
<span style="color: #494949;">" 0000 1010 1010 1011 0001 0000 0010 0011 \n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : JIE\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 1010\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"JIE [argument address] [argument address] [argument address]\n"</span>
<span style="color: #494949;">"jumps to the third argument address if the value of the first argument\n"</span>
<span style="color: #494949;">"address equals the second argumet address\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : JMP\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 0101\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"JMP [argument address]\n"</span>
<span style="color: #494949;">"unconditionally jumps to the argument address provided\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : MOV\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 1100\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"MOV [argument address] [argument address]\n"</span>
<span style="color: #494949;">"copies the value stored in the first argument address to the second argument\n"</span>
<span style="color: #494949;">"address unconditionally\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : ADD\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 1011\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"ADD [argument address] [argument address] [argument address]\n"</span>
<span style="color: #494949;">"adds the contents of the first argument address to the second argument\n"</span>
<span style="color: #494949;">"address and then places the result in the third argument address\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : FLP\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 0100\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"FLP [argument address]\n"</span>
<span style="color: #494949;">"flips the bits in the argument address provided\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : RED\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 1101\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"RED [argument address] [argument address]\n"</span>
<span style="color: #494949;">"special instruction, reads the value located in the directly addressed\n"</span>
<span style="color: #494949;">"space to the second argument address, the first argument address provides\n"</span>
<span style="color: #494949;">"the pointer to the location of the data in the directly addressed space\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : WRT\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 0010\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"WRT [argument address] [argument address]\n"</span>
<span style="color: #494949;">"special instruction, writes the value located in the second argument\n"</span>
<span style="color: #494949;">"address to an address located in the directly addressed space, the first\n"</span>
<span style="color: #494949;">"argument address provides the pointer to the location of the data in the\n"</span>
<span style="color: #494949;">"directly addresssed space\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"instruction : STP\n"</span>
<span style="color: #494949;">"binary representatioin : 0000 1111\n"</span>
<span style="color: #494949;">"usage : \n"</span>
<span style="color: #494949;">"STP\n"</span>
<span style="color: #494949;">"Stops the execution of code by system/b\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"debugging code :\n"</span>
<span style="color: #494949;">"To debug system/b assembly programs, simply create a system/b instance\n"</span>
<span style="color: #494949;">"and load a system/b machine code file into the machine. Then step through\n"</span>
<span style="color: #494949;">"the code using the included assembler using the \"stepCycle\" command, it\n"</span>
<span style="color: #494949;">"may be advisable to use the immDump and idrDump commands to gain a \n"</span>
<span style="color: #494949;">"snapshot of the immediate address space and the indirect address space.\n"</span>
<span style="color: #494949;">"Viewing these snapshots, translate the binary to the assembly yourself and\n"</span>
<span style="color: #494949;">"use that to identify how the program is running\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"\n"</span>
<span style="color: #494949;">"system implmentation :\n"</span>
<span style="color: #494949;">"system/b is a simple machine modled loosely on the Analytical Engine\n"</span>
<span style="color: #494949;">"as created by Charles Babbage. The operation of system/b is simple to,\n"</span>
<span style="color: #494949;">"visualize. The code is loaded into the immediately addressable space as\n"</span>
<span style="color: #494949;">"a series of binary instructions that are read by the machine and then\n"</span>
<span style="color: #494949;">"executed, with all non-jump instructions iterating the instruction counter\n"</span>
<span style="color: #494949;">"by, causing the next instruction in the immediately addressed space to \n"</span>
<span style="color: #494949;">"be executed. Code can be loaded into the directly addressed space using the\n"</span>
<span style="color: #494949;">"special WRT instruction and read from it using the RED instruction. All numbers\n"</span>
<span style="color: #494949;">"are stored in a little endian two's complment format."</span>;
<span style="color: #494949;">}</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-weight: bold; font-style: italic;">quitText</span><span style="color: #494949;">()</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935; font-style: italic;">return</span>
<span style="color: #494949;">"Thank you for using system/b, have a nice day.\n"</span>;
<span style="color: #494949;">}</span>
</pre>
</div>
</div>
</div>
<div id="outline-container-org559422c" class="outline-3">
<h3 id="org559422c">assembler.h</h3>
<div class="outline-text-3" id="text-org559422c">
<div class="org-src-container">
<pre class="src src-C++"><span style="color: #000; font-weight: bold;">#pragma</span> once
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">fstream</span><span style="color: #494949;">></span>
<span style="color: #000; font-weight: bold;">#include</span> <span style="color: #494949;"><</span><span style="color: #494949;">bitset</span><span style="color: #494949;">></span>
<span style="color: #E53935;">void</span> <span style="font-weight: bold; font-style: italic;">assemble</span><span style="color: #494949;">(</span><span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">inputFile</span>, <span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">outputFile</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">ifstream</span> <span style="font-style: italic;">inFile</span>;
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">ofstream</span> <span style="font-style: italic;">otFile</span><span style="color: #bbb;">(</span>outputFile<span style="color: #bbb;">)</span>;
<span style="color: #E53935;">std</span>::<span style="color: #E53935;">string</span> <span style="font-style: italic;">instruction</span>,
<span style="font-style: italic;">argumentAddr1</span>,
<span style="font-style: italic;">argumentAddr2</span>,
<span style="font-style: italic;">argumentAddr3</span>,
<span style="font-style: italic;">machineLine</span>,
<span style="font-style: italic;">ignore</span>;
<span style="color: #E53935;">bool</span> <span style="font-style: italic;">complete</span> = <span style="color: #E53935;">false</span>;
inFile.open<span style="color: #bbb;">(</span>inputFile<span style="color: #bbb;">)</span>;
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span><span style="color: #000; font-weight: bold;">!</span>inFile<span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935; font-style: italic;">throw</span> <span style="color: #E53935;">std</span>::invalid_argument<span style="color: #494949;">(</span><span style="color: #494949;">"infile not accessable"</span><span style="color: #494949;">)</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">while</span> <span style="color: #bbb;">(</span><span style="color: #000; font-weight: bold;">!</span>complete<span style="color: #bbb;">)</span> <span style="color: #bbb;">{</span>
inFile >> instruction;
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>inFile<span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> * this checks if the instruction is actually a comment</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #bbb;">(</span>instruction == <span style="color: #494949;">";"</span><span style="color: #bbb;">)</span>
<span style="color: #bbb;">{</span>
<span style="color: #E53935;">std</span>::getline<span style="color: #494949;">(</span>inFile, ignore<span style="color: #494949;">)</span>;
<span style="color: #bbb;">}</span>
<span style="color: #E53935; font-style: italic;">else</span>
<span style="color: #bbb;">{</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : JIE</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1010</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> JIE [argument address] [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> jumps to the third argument address if the value of the first argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address equals the second argumet address</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>instruction == <span style="color: #494949;">"JIE"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
inFile >> argumentAddr1;
inFile >> argumentAddr2;
inFile >> argumentAddr3;
machineLine = <span style="color: #494949;">"00001010"</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr2<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr3<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : JMP</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 0101</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> JMP [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> unconditionally jumps to the argument address provided</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>instruction == <span style="color: #494949;">"JMP"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
inFile >> argumentAddr1;
machineLine = <span style="color: #494949;">"00000101"</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #494949;">"0000000000000000"</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : MOV</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1100</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> MOV [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> copies the value stored in the first argument address to the second argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address unconditionally</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>instruction == <span style="color: #494949;">"MOV"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
inFile >> argumentAddr1;
inFile >> argumentAddr2;
machineLine = <span style="color: #494949;">"00001100"</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr2<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #494949;">"00000000"</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : ADD</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1011</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> ADD [argument address] [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> adds the contents of the first argument address to the second argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address and then places the result in the third argument address</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>instruction == <span style="color: #494949;">"ADD"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
inFile >> argumentAddr1;
inFile >> argumentAddr2;
inFile >> argumentAddr3;
machineLine = <span style="color: #494949;">"00001011"</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr2<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr3<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : FLP</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 0100</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> FLP [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> flips the bits in the argument address provided</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>instruction == <span style="color: #494949;">"FLP"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
inFile >> argumentAddr1;
machineLine = <span style="color: #494949;">"00000100"</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #494949;">"0000000000000000"</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : RED</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 1101</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> RED [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> special instruction, reads the value located in the directly addressed</span>
<span style="color: #a4a4a4; font-style: italic;"> space to the second argument address, the first argument address provides</span>
<span style="color: #a4a4a4; font-style: italic;"> the pointer to the location of the data in the directly addressed space</span>
<span style="color: #a4a4a4; font-style: italic;"> */</span>
<span style="color: #E53935; font-style: italic;">else</span> <span style="color: #E53935; font-style: italic;">if</span> <span style="color: #494949;">(</span>instruction == <span style="color: #494949;">"RED"</span><span style="color: #494949;">)</span>
<span style="color: #494949;">{</span>
inFile >> argumentAddr1;
inFile >> argumentAddr2;
machineLine = <span style="color: #494949;">"00001101"</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr1<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #E53935;">std</span>::bitset<span style="color: #bbb;"><</span>8<span style="color: #bbb;">>(</span>stoi<span style="color: #494949;">(</span>argumentAddr2<span style="color: #494949;">)</span><span style="color: #bbb;">)</span>.to_string<span style="color: #bbb;">()</span> + <span style="color: #494949;">"00000000"</span>;
<span style="color: #494949;">}</span>
<span style="color: #a4a4a4; font-style: italic;">/*</span>
<span style="color: #a4a4a4; font-style: italic;"> instruction : WRT</span>
<span style="color: #a4a4a4; font-style: italic;"> binary representatioin : 0000 0010</span>
<span style="color: #a4a4a4; font-style: italic;"> usage :</span>
<span style="color: #a4a4a4; font-style: italic;"> WRT [argument address] [argument address]</span>
<span style="color: #a4a4a4; font-style: italic;"> special instruction, writes the value located in the second argument</span>
<span style="color: #a4a4a4; font-style: italic;"> address to an address located in the directly addressed space, the first</span>
<span style="color: #a4a4a4; font-style: italic;"> argument address provides the pointer to the location of the data in the</span>
<span style="color: #a4a4a4; font-style: italic;"> directly addresssed space</span>