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   paulrickards (paulrickards@mastodon.social)'s status on Thursday, 28-Sep-2023 03:28:36 JST paulrickards

   in reply to

   Some progress on the #AppleLisaClone today.

   -Received a new COP402 processor to replace the COP402M (microchannel version).

   -Replaced the two new W65C22N with real MOS 6522 chips (from a 1541 floppy drive!)

   -Replaced a 74HC132 with a proper 74LS132 (IO board clock).

   With that, soft power now works the way it should!

   Next problem: it gives a single beep at startup with a scrambled screen (see video). Fault: CPU or RAM?

   #RetroComputing