This is a cool little game (in development) that lets you build a CPU from scratch starting with a single nand gate.
Post your progress
NandGame
Asher Powell
Other urls found in this thread:
Joshua Thompson
i don't know shit about programming or hardware but this is fun
Logan Edwards
Surprisingly intriguing.
Brayden Diaz
I thought it would be as easy as linking a to b and b to a. I guess not
Robert Hill
seems similar to MHRD
Angel Cook
I'm not autistic enough for this
William Cooper
Can anyone tell me why this solution is wrong? It's kind of driving me crazy. I thought the idea was that each 2-bit input gets its own adder, and the carry output from one adder is the carry input to the next. My only idea is that maybe I'm mixing up 'l' and 'h' somewhere, those confuse me a bit.
Jaxon Anderson
You're adding the wrong things together. You're adding 2-bit binary numbers, so the first digit (from the right) is the number of 1s in the number and the second digit is the number of 2s. You're using the add gate to add the number of 1s and 2s together. You should be adding the 1s from both numbers together, and the 2s from both columns together. The carry is just another count of how many 1s there are. And the high (the h value) of adding the ones together is just another count of how many 2s there are, since adding 2 1s together will result in haivng 1 two, so it acts as a carry for the second add gate.
To put it simply, use one add gate to add all the 1s, and another to add all the 2s, including the 2 that is made by adding 2 ones together. Cheers~
Easton Rogers
this is difficult
Hunter Barnes
This was basically my undergrad. Pretty fun desu. It's a pretty amazing feeling to pull a CPU out of silicon
William Scott
CE?
James Bailey
Sebastian Bailey
I'm a brainlet and can't get past level 2.
Anthony Torres
And EE. It was actually mostly verilog, but I think I could design a CPU from basic gates if I tried. Properly wiring it, probably not
Aiden Jackson
Don't worry user. If this stuff was easy, everyone would hold a CS degree.
Jayden Scott
Wow. This is the first 4 labs of my computer organization course in game format
Hunter Wilson
Dev is also working on adding support for starting with only a xor gate instead of a nand gate.
Jeremiah Gomez
Aha, thanks! That makes sense.
Daniel Myers
Chase Jackson
swiftly downloaded and installed. Thanks user~
Christian Nguyen
What do I do for counter. I feel like a brainlet, but the "what you did wrong" explanation is using variables that don't exist at all. It's like it was machine translated.
Joseph Price
Luke Murphy
>starting with only a xor gate
That should be a nor gate, surely
Joseph Smith
Owen Long
Behold, true S K I L L S
Nathaniel Baker
So this fails and I'm not sure why, I think it's because the left latch (Q1?) shouldn't update if cl = 1. But I don't know how to encode "make st = 0 if cl = 1, otherwise leave it alone". What do?
John Russell
Why doesn't it work? I seem to have followed the instructions perfectly.
Owen Allen
You don't really want st to be controlling _when_ your first latch latches, that's the clock's job. You want it to control whether it it latches at all.
Ryder Hill
If anyone gets through the whole thing, it'd be cool if they would screenshot all their answers so we'd have a solution guide. Us brainlets would appreciate it.
Nolan Myers
what would be the point?
Alexander Walker
"j indicate if the condition specified by the instruction is fulfilled by the ALU output"
Carter Gomez
Also "The X input of the ALU is always the D register"
Jonathan Foster
OK, I'm stupid. I didn't read half the instructions.
Isaac Rodriguez
The point would be to learn. If you've given something a good deal of effort but you really can't figure it out, checking the answer helps you see what you did wrong and how to fix it. That's still a learning experience even though you """cheated""" to get there.
John Powell
Alexander Edwards
What am I doing wrong here? Trying to make a full adder.
Josiah Hill
John Gray
the OR should be going to the higher bit, just swap your outputs
Austin Harris
Is this just graphical nand2tetris? I completed that one up to where I had a working assembler in python but then I got bored
Gabriel Allen
I got to the full adder and I checked wikipedia and I found the scheme but now I feel like an idiot because I checked the solution. Am I one? Also on which basis am I supposed to get the answer? Just think logically until something falls to my mind or do a research?
Samuel Wilson
yeah just think about it
Jacob Evans
O I did it haha
Jackson Morales
the AND gate is the one true gate, our lord and savior.