On Fri, Jun 11, 2021 at 05:21 PM, saturn5tony wrote:
Here is the 1st boot of just the Z80MC CPU board!? yippee!
Now here is the CPU and the Font panel display keypad system. Woot #2!!
Just finished it today. Had a bit of issues with glitching at 1st even though I did replace the 74LS245 with the 74HC245 I managed to find yesterday. I dont think it was necessary because there seemed to be an issue with the Molex connectors needing a bit more soldering. Even though I used the great Kester 186 flux the plating on the connectors really had a hard time making a good connection with the external leads and the pcb traces. Redid it and I was finally able to slide the top board down onto the CPU board. It only worked halfway so I new it was the molex's. Even put a real nice tiny piezo buzzer from CUI for about a buck or so. Not quite as loud as the flat ones but easier to mount and has a good sound. I did have to replace a key on keyboard tho as well. Glad I bought a few extra too.
Enclosed is a couple side views.
I will say I have been banging around with the software for a few hours now and man this looks great! I love the single-step controls and memory stuff on the hexkey pad and the access to data is just really cool. Both the terminal mode and keypad access are just really nice! I cant wait to finish the SIO board now. This is really an awesome machine.
-Tony
