I finally finished building the ALU part! Here's a picture. The FPGA in the middle does addition, subtraction, complement, and, or, xor, and shifts. The rest off the chips are buffers, comparaters, registers, and the A register. The eight LEDs are connected to the data bus. If you have any suggestions please comment! Thanks!

Bohan Xu
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Hi Bohan, does your ALU also do AND, OR, XOR ? They are important. Perhaps you can get inspiration from my project, the ALU is described here:
https://hackaday.io/project/190345-isetta-ttl-computer/log/217189-the-alu-of-isetta
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Hi roelh! Yes my ALU does support AND OR and XOR. I’ll also definitely take inspiration from your ALU. Thanks a ton for the link this is super helpful!
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