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Slow progress...

A project log for JACA 1 & 2 Homebrew Computer

JACA - Just Another CPU Again Homebrew CPU, starting by a simple POC 4-bit CPU on circuit simulator soft. (done), then 8-bit (in progress)

andre-baptistaAndre Baptista 03/22/2018 at 12:010 Comments

Slow project progress last month...

But at least I managed to finish the EasyEDA documentation of the modules (pictures below).

The situation so far: I have all the modules (a very crude version of them) finished and working on breadboards. This weekend I will try to put them together and hopefully see the CPU working for the first time outside the Logisim simulator.

By "working" I mean, capable of run one single instruction: LD A, value. That is, to load an 8 bit value in the A register (the only one avaliable).

After that, I could expand the modules, by adding registers, adding logic to connect the ALU to registers, logic to control the jumps, etc.

Thanks for reading.

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