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Forums > Vintage Apple > Macintosh > Macintosh LC & Performa
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Mike's Future Retro New Tinkerer -------- Joined: Mar 18, 2025 Posts: 7 Likes: 3 |
Sep 26, 2025 - #1
I recently acquired a performs 475. Can some one answer what goes in the empty simm slot ? The simm slot on the top row is regular 80ns ram, then a slightly smaller width simm slot (empty in the picture) then 2 simm slots for video ram... what's that empty slot for ???
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dougg3 Tinkerer -------- Joined: Jan 10, 2022 Posts: 33 Likes: 47 |
Sep 26, 2025 - #2
It's for a ROM SIMM that could override the soldered-on ROM chips. Most 475 boards I've seen don't have that socket populated; you might have an early board.
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