You can also do it with NOT gates. The driver needs to overpower the gates to change the bit and then it acts like a D flip flop rather than an RS flip flop like NAND gates will. But that’s generally how they’re actually made. SRAM generally looks like this: The side transistors are called access transistors; they’re there so you can selectively read/write, but aren’t needed to store the bit.
So here’s some bad math. 160 crabs per NAND gate / byte. Doom’s original file size is roughly 2.39MB (I couldn’t find an actual source for this but it’s touted all over the web).
2 NAND gates are only a bit. You need 8 of those for a byte, that is 8 * 160 = 1280 crabs. For Doom you need 1280 * 2390000 = 3059200000 = 3059.2 million crabs
uh. no? a logic gate isn’t a bit. you can store a single bit with a pair of not gates to make a flip flop, but the core logic here is flawed
Right? Even if it weren’t, this only calculates how many crabs it would take to store Doom, not run it.
No mention of fps or latency, authors clearly not gamers.
Imagine some Smash Bros players who get pissy about 16.6ms playing on a CrabCPU with 13s latency…
Authors never said anything about gaming, the tweet did
With over sixteen billion crabs involved, I’m sure the latency would be measured in years.
Of course they’re not gamers, they have brains.
I see no downsides to this.
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You can also do it with NOT gates. The driver needs to overpower the gates to change the bit and then it acts like a D flip flop rather than an RS flip flop like NAND gates will. But that’s generally how they’re actually made. SRAM generally looks like this:
The side transistors are called access transistors; they’re there so you can selectively read/write, but aren’t needed to store the bit.
So here’s some bad math. 160 crabs per NAND gate / byte. Doom’s original file size is roughly 2.39MB (I couldn’t find an actual source for this but it’s touted all over the web).
So 2390000 bytes * 160 crabs is 382400000 crabs.
So you can run doom on 382.4 million crabs
Edit: store, not run
you can
runstore doom2 NAND gates are only a bit. You need 8 of those for a byte, that is 8 * 160 = 1280 crabs. For Doom you need 1280 * 2390000 = 3059200000 = 3059.2 million crabs
yes, tired brain hiccup :)
From the paper the picture is of an and gate.
https://wpmedia.wolfram.com/uploads/sites/13/2018/02/20-2-2.pdf
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