114 lines
2.4 KiB
HTML
114 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>etc-nand</title>
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<meta charset="utf-8">
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</head>
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<body>
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<div style="
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">
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<p><br></p>
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<h1>etc-nand</h1>
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</div>
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<div style="
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">
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<p><br></p>
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<h2>Overview</h2>
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<p>etc-nand is a real-world <a href="https://github.com/ETC-A/etca-spec/">ETC.A</a> CPU built from almost only quad NAND gate ICs (74hc00)</p>
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<p>It will probably be finished in a few months.</p>
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</div>
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<div style="
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<p><br></p>
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<h3>Estimates</h3>
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<p>Estimated gate count:</p>
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<ul>
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<li>2800 NAND gates</li>
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<li>320 tristate buffers</li>
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</ul>
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<p><br>
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Estimated component counts:</p>
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<ul>
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<li>700x 74hc00 quad NAND gates</li>
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<li>40x 74HC54 octal tristate buffers</li>
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<li>a few simple resistors</li>
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</ul>
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</div>
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<div style="
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<p><br></p>
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<h3>Planned Specifications</h3>
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<p>ETC.A base instruction set + byte operations + S&F + Von Neumann</p>
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<p>The CPU will communicate with peripherals over a 16 bit data + 15 bit address memory bus</p>
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</div>
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<div style="
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<p><br></p>
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<h2>Purchase</h2>
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<p>You will be able to purchase one in the future.</p>
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<p>Stay tuned!</p>
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</div>
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<div style="
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<p><br></p>
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<h2>Images</h2>
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<p>Images of PCBs that are either already manifactured or currently beeing manifactured by JLCPCB.</p>
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</div>
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<div style="
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<p><br></p>
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<h3>16 bit register</h3>
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<img src="res/etc-nand/reg16_front.png" style="width:100%;">
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</div>
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<div style="
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<p><br></p>
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<h3>8 bit ALU slice</h3>
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<p>A <a href="#add8">8 bit adder module</a> will be placed in the middle</p>
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<img src="res/etc-nand/alu8_front.png" style="width:100%;">
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</div>
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<div style="
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<p><br></p>
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<h3 id="add8">8 bit adder</h3>
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<img src="res/etc-nand/add8_front.png" style="width:100%;">
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</div>
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</body>
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</html>
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