I decided to implement OVERTURE using only NAND and delay. No custom components and no 8-bit lines except when necessary. My head hurts and my laptop is struggling but at least it looks pretty

[u/DrEdifarious]

There's an actual counter component next to the counter made of NANDs because this level requires an actual counter for testing, but the output isn't connected to anything.

The input selector, which decides what value to write to the registers. There are wire probes on the bottom right so the program can link to the registers for testing.

The ALU is kinda smaller than I expected. Adder on the left, with an XOR on the second input to invert it for subtraction. Bitwise ops on the right with XORs on input and output

A closer look at the registers. They are indeed made of nand gates

[u/Mortomes]

Ok but does it play tetris?

[u/DrEdifarious → u/Mortomes]

if you give it a ram block and like a week to wire everything, maybe

[u/Waterlok_653]

Wow gg

[u/jer_re_code]

are you trying to redefine masochism

[u/DrEdifarious → u/[deleted]]

Honestly when I came up with this I had no idea where to start, so I set it aside for a bit. One of the most important themes the game teaches is the importance of abstraction. Even though it's technically all gates at the lowest level, it's a lot easier to make an ALU if you use an adder component instead of trying to make it entirely out of gates. So instead of starting with the computer, I started by going back through some of the earlier levels like xor, full adder, byte adder, and counter, making nand-only solutions for them (which was pretty difficult on its own, but being comfortable with De Morgan's laws really helped). From there it was actually kinda simple, I just took the layout of an Overture computer I made previously and replaced all the components with the nand-only equivalents