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A project log for Evolving Z80

Because I'm too poor for a full computer

FloppidyDingoFloppidyDingo 06/11/2016 at 01:220 Comments

I have the test circuit up and running, and I've done what I can to record the behavior of the CPU.

The clock IC is there, it's just very small and doesn't show well on my low res phone camera.

There were some issues with this circuit though. I have to let it sit for several seconds after powering it off before powering it back up, or else the CPU will stall. This was fixed by adding in a POR chip (shown below) so the CPU resets every power up. The CPU also seems to work on 3.3 volts too.

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