Uploaded July 2023 | Updated September 2026, 1 week ago

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This 4 bit adder/subtractor uses 2s compliment subtraction. Left 4 crates are A3,A2,A1,A0 and right 4 crates are B3,B2,B1,B0.
The check point that appears is the Cout bit.
Example, is A = 1000, B = 0001, A-B = 0001.

Below is some links I used to learn this.
binary-code.org/bits/4
everycircuit.com/circuit/4935493180981248/4bit-adder-subtractor
arith-matic.com/notebook/binary-subtraction
Share your level in this discord server: discord.gg/e8ZSrhVyRg
Get Crash Bandicoot: Back in Time here: gembit.itch.io/crash-back-in-time
dropbox.com/s/rn03ld3biscog0j/4BItADDERSUBTractor?dl=0