808 lines
19 KiB
HTML
808 lines
19 KiB
HTML
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<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>ocpu</title>
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/* add a generic configuration mode; LaTeX export needs an additional
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table { border-collapse:collapse; }
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td, th { vertical-align:top; }
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th.org-right { text-align: center; }
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th.org-left { text-align: center; }
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th.org-center { text-align: center; }
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td.org-right { text-align: right; }
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td.org-left { text-align: left; }
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td.org-center { text-align: center; }
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dt { font-weight: bold; }
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border: 2px solid gray;
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margin: 10px;
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background: #ffffcc;
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}
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#org-div-home-and-up
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{ text-align: right; font-size: 70%; white-space: nowrap; }
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textarea { overflow-x: auto; }
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.linenr { font-size: smaller }
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.code-highlighted { background-color: #ffff00; }
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.org-info-js_info-navigation { border-style: none; }
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#org-info-js_console-label
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{ font-size: 10px; font-weight: bold; white-space: nowrap; }
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.org-info-js_search-highlight
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{ background-color: #ffff00; color: #000000; font-weight: bold; }
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.org-svg { width: 90%; }
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</style>
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<link rel="stylesheet" type="text/css" href="style.css"/>
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</head>
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<body>
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<div id="content" class="content">
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<h1 class="title">ocpu</h1>
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<div id="outline-container-orgebc8d28" class="outline-2">
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<h2 id="orgebc8d28">GRU ocpu - yet another cpu design</h2>
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<div class="outline-text-2" id="text-orgebc8d28">
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</div>
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<div id="outline-container-orgea57f0e" class="outline-3">
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<h3 id="orgea57f0e">Features</h3>
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<div class="outline-text-3" id="text-orgea57f0e">
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<ul class="org-ul">
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<li>little endian</li>
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<li>16-bit</li>
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</ul>
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</div>
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</div>
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<div id="outline-container-orgb176908" class="outline-3">
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<h3 id="orgb176908">Registers</h3>
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<div class="outline-text-3" id="text-orgb176908">
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<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
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<colgroup>
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<col class="org-left" />
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<col class="org-left" />
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<col class="org-left" />
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</colgroup>
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<thead>
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<tr>
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<th scope="col" class="org-left">Register</th>
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<th scope="col" class="org-left">Category</th>
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<th scope="col" class="org-left">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="org-left">AL</td>
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<td class="org-left">General</td>
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<td class="org-left">0xA0, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">AH</td>
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<td class="org-left">General</td>
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<td class="org-left">0xA1, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">A</td>
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<td class="org-left">General</td>
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<td class="org-left">0x0A, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">BL</td>
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<td class="org-left">General</td>
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<td class="org-left">0xB0, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">BH</td>
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<td class="org-left">General</td>
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<td class="org-left">0xB1, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">B</td>
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<td class="org-left">General</td>
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<td class="org-left">0x0B, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">CL</td>
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<td class="org-left">General</td>
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<td class="org-left">0xC0, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">CH</td>
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<td class="org-left">General</td>
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<td class="org-left">0xC1, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">C</td>
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<td class="org-left">General</td>
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<td class="org-left">0x0C, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">DL</td>
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<td class="org-left"> </td>
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<td class="org-left">0xD0, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">DH</td>
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<td class="org-left"> </td>
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<td class="org-left">0xD1, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">D</td>
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<td class="org-left"> </td>
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<td class="org-left">0x0D, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">EL</td>
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<td class="org-left"> </td>
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<td class="org-left">0xE0, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">EH</td>
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<td class="org-left"> </td>
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<td class="org-left">0xE1, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">E</td>
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<td class="org-left"> </td>
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<td class="org-left">0x0E, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">FL</td>
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<td class="org-left"> </td>
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<td class="org-left">0xF0, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">FH</td>
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<td class="org-left"> </td>
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<td class="org-left">0xF1, 8-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">F</td>
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<td class="org-left"> </td>
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<td class="org-left">0x0F, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">PC</td>
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<td class="org-left">Pointer</td>
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<td class="org-left">Program Counter, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">SP</td>
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<td class="org-left">Pointer</td>
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<td class="org-left">Stack Pointer, 16-bit</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">ZF</td>
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<td class="org-left">Flag</td>
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<td class="org-left">Zero Flag</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">NF</td>
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<td class="org-left">Flag</td>
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<td class="org-left">Negative Flag</td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">CF</td>
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<td class="org-left">Flag</td>
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<td class="org-left">Carry Flag</td>
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</tr>
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<tr>
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<td class="org-left"> </td>
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<td class="org-left"> </td>
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<td class="org-left"> </td>
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</tr>
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</tbody>
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<tbody>
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<tr>
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<td class="org-left">OF</td>
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<td class="org-left">Flag</td>
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<td class="org-left">Overflow Flag</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div id="outline-container-org97202a6" class="outline-3">
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<h3 id="org97202a6">Instuctions</h3>
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<div class="outline-text-3" id="text-org97202a6">
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<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
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<colgroup>
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<col class="org-left" />
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<col class="org-right" />
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<col class="org-left" />
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</colgroup>
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<thead>
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<tr>
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<th scope="col" class="org-left">Instructions</th>
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<th scope="col" class="org-right">Opcode</th>
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<th scope="col" class="org-left">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="org-left">MOV reg, imm16</td>
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<td class="org-right">0x01</td>
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<td class="org-left">Place value to register.</td>
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</tr>
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<tr>
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<td class="org-left">MOV reg, reg</td>
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<td class="org-right">0xA1</td>
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<td class="org-left">Takes 2 bytes as arguments:</td>
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</tr>
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<tr>
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<td class="org-left"> </td>
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<td class="org-right"> </td>
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<td class="org-left">1 - Opcode of register</td>
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</tr>
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<tr>
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<td class="org-left"> </td>
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<td class="org-right"> </td>
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<td class="org-left">2 - Value or register</td>
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</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"> </td>
|
|
<td class="org-right"> </td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">ADD reg, imm16</td>
|
|
<td class="org-right">0x10</td>
|
|
<td class="org-left">Add</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">ADD reg, reg</td>
|
|
<td class="org-right">0xB0</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">ADC reg, imm16</td>
|
|
<td class="org-right">0x11</td>
|
|
<td class="org-left">Add with carry</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">ADC reg, reg</td>
|
|
<td class="org-right">0xB1</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">SUB reg, imm16</td>
|
|
<td class="org-right">0x12</td>
|
|
<td class="org-left">Subtract</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">SUB reg, reg</td>
|
|
<td class="org-right">0xB2</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">MUL reg, imm16</td>
|
|
<td class="org-right">0x13</td>
|
|
<td class="org-left">Multiply</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">MUL reg, reg</td>
|
|
<td class="org-right">0xB3</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">DIV reg, imm16</td>
|
|
<td class="org-right">0x14</td>
|
|
<td class="org-left">Divide</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">DIV reg, reg</td>
|
|
<td class="org-right">0xB4</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">INC reg</td>
|
|
<td class="org-right">0x15</td>
|
|
<td class="org-left">Increment</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"> </td>
|
|
<td class="org-right"> </td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">DEC reg</td>
|
|
<td class="org-right">0x16</td>
|
|
<td class="org-left">Decrement</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">NOT reg</td>
|
|
<td class="org-right">0x20</td>
|
|
<td class="org-left">Logical NOT</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">AND reg, imm16</td>
|
|
<td class="org-right">0x21</td>
|
|
<td class="org-left">Logical AND</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">AND reg, reg</td>
|
|
<td class="org-right">0xC1</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">OR reg, imm16</td>
|
|
<td class="org-right">0x22</td>
|
|
<td class="org-left">Logical OR</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">OR reg, reg</td>
|
|
<td class="org-right">0xC2</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">NOR reg, imm16</td>
|
|
<td class="org-right">0x23</td>
|
|
<td class="org-left">Logical NOR</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">NOR reg, reg</td>
|
|
<td class="org-right">0xC3</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">XOR reg, imm16</td>
|
|
<td class="org-right">0x24</td>
|
|
<td class="org-left">Logical XOR</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">XOR reg, reg</td>
|
|
<td class="org-right">0xC4</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">NAND reg, imm16</td>
|
|
<td class="org-right">0x25</td>
|
|
<td class="org-left">Logical NAND</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">NAND reg, reg</td>
|
|
<td class="org-right">0xC5</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">CMP reg, imm16</td>
|
|
<td class="org-right">0x26</td>
|
|
<td class="org-left">Compare</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left">CMP reg, reg</td>
|
|
<td class="org-right">0xC6</td>
|
|
<td class="org-left"> </td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">PUSH imm16</td>
|
|
<td class="org-right">0x30</td>
|
|
<td class="org-left">Push to stack</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">POP</td>
|
|
<td class="org-right">0x31</td>
|
|
<td class="org-left">Pop to stack</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JMP imm16</td>
|
|
<td class="org-right">0x40</td>
|
|
<td class="org-left">Jump</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JSR imm16</td>
|
|
<td class="org-right">0x41</td>
|
|
<td class="org-left">Jump to subroutine</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JC imm16</td>
|
|
<td class="org-right">0x42</td>
|
|
<td class="org-left">Jump with carry</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JNC imm16</td>
|
|
<td class="org-right">0x43</td>
|
|
<td class="org-left">Jump without carry</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JZ imm16</td>
|
|
<td class="org-right">0x44</td>
|
|
<td class="org-left">Jump if zero</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JNZ imm16</td>
|
|
<td class="org-right">0x45</td>
|
|
<td class="org-left">Jump if non-zero</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JE imm16</td>
|
|
<td class="org-right">0x46</td>
|
|
<td class="org-left">Jump if equal</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JL imm16</td>
|
|
<td class="org-right">0x47</td>
|
|
<td class="org-left">Jump if lower</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">JH imm16</td>
|
|
<td class="org-right">0x48</td>
|
|
<td class="org-left">Jump if higher</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">RTS</td>
|
|
<td class="org-right">0x49</td>
|
|
<td class="org-left">Return from subroutine</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">INB imm16</td>
|
|
<td class="org-right">0x50</td>
|
|
<td class="org-left">Copies value from I/O port to destination</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">OUTB imm16</td>
|
|
<td class="org-right">0x51</td>
|
|
<td class="org-left">Copies value from operand to I/O port</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">NOP</td>
|
|
<td class="org-right">0x90</td>
|
|
<td class="org-left">No operation</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">SEC</td>
|
|
<td class="org-right">0x61</td>
|
|
<td class="org-left">Set carry flag</td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr>
|
|
<td class="org-left">CLC</td>
|
|
<td class="org-right">0x62</td>
|
|
<td class="org-left">Clear carry flag</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
|
|
<p>
|
|
0x0* - MOV instructions (maybe it will for LDA or something)
|
|
</p>
|
|
|
|
<p>
|
|
0x1* - Arithmetic (ADD, SUB and others)
|
|
</p>
|
|
|
|
<p>
|
|
0x2* - Logic (AND, OR and others)
|
|
</p>
|
|
|
|
<p>
|
|
0x3* - Stack Operations (PUSH, POP)
|
|
</p>
|
|
|
|
<p>
|
|
0x4* - Jumps
|
|
</p>
|
|
|
|
<p>
|
|
0x5* - Ports Operations
|
|
</p>
|
|
|
|
<p>
|
|
0x6* - Flags Operations
|
|
</p>
|
|
|
|
<p>
|
|
0x90 - NOP
|
|
</p>
|
|
|
|
|
|
<p>
|
|
TODO: add interrupts
|
|
</p>
|
|
|
|
<p>
|
|
TODO: add HLT
|
|
</p>
|
|
|
|
<p>
|
|
TODO: add instructions for memory use
|
|
</p>
|
|
|
|
<p>
|
|
TODO: add more description
|
|
</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|