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