Ok so scoping that out, VCC and Ground on the keyboard controller looked like a data pin. Someone suggested I have the sockets mixed up, and yes I did. The keyboard controller goes in the other 40 pin socket, the one furthest from the keyboard. Of course it does!
(I had this out before to test a different board with, seems like I didn't pay attention. And of course the sockets are not labeled)
I feel so dumb. Real bun moment. No brain, just fluff.
(I had this out before to test a different board with, seems like I didn't pay attention. And of course the sockets are not labeled)
I feel so dumb. Real bun moment. No brain, just fluff.
Recently picked up this General Electric EE7-4325 flip clock radio at a flea market for Eiliko over at https://news.1rj.ru/str/eilikosretrostube
Time to ship it to him :3
Time to ship it to him :3
CRT technology is so incredibly cool and fascinating to me. On the surface, the physics is high school level easy, but tons of engineering went into it to get it to where it was at its peak.
Been asked to look at a few signals here and there, as a comparison to help someone fix theirs.
When I got this Atari only one bank of 512k RAM was working. It has the infamous MT made RAM ICs that are known to be problematic. And indeed, two were bad. At that time I only had one replacement IC. Now, thanks to some recent bulk acquisitions of D-RAM ICs I have plenty of spare parts.
The test program is called TESTRAM.TOS.
I also put a new set of ROMs in with the latest TOS that this machine supports.
The test program is called TESTRAM.TOS.
I also put a new set of ROMs in with the latest TOS that this machine supports.
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