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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