A fully populated SunRem 2MB RAM card for an Apple Lisa, a green circuit board with many ICs and 8x30 pin SIMMs.

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   paulrickards (paulrickards@mastodon.social)'s status on Thursday, 26-Oct-2023 04:31:27 JST paulrickards

   in reply to

   When I bought the ICs for the SunRem 2MB card, I missed the fact the top two chips (highlighted in yellow) are supposed to be 74LS373. Instead I stuffed 73S373 chips (note S vs LS) just like the bottom three (highlighted in red).

   I finally got the LS parts and swapped those in.

   Much to my surprise the card now seems to work perfectly, at least with MacWorks! 🎉✨

   Thanks to @iconicbits for reminding me!

   #AppleLisaClone #RetroComputing