saturn5tony via groups.io wrote:
OK Completed the SIO board today! Like the above comment, this is really a great Z80 machine. Here is the finished board as well as the 1st listing entering into C/PM enclosed. So cool to see that classic C/PM operating system and MBasic as well.
Still have this issue tho with not only having to slide the Top keypad board half way onto the CPU board, I even have to slide the SIO half way as well. idk whats happening because it works fine with all functions but if they are "squeezed" together for a tight fit, no led display or even now sio access is possible. I have to look into this more but halfway works for the time being and I am having fun. Even checked out the SD card and Xmodems stuff and everything works great!
Congratulations, Tony! Your build is all the more impressive because you just got the bare boards, and had to source everything else yourself.
On the connector intermittents: What kind of connectors did you use? I supply Molex KK with gold plated pins. They have been pretty reliable, even with bent or mis-aligned pins and other problems.
Lee
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Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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Lee Hart