Hello list, The supply of the IM6654 PROM i use in my Spider clone has dried up and was wondering if anyone had suggestions on how to use a modern part for a replacement. IM6654 is a 8x512B device so could using a AT28C512 on an adapter do the trick? My PROM/EEPROM knowledge is limited so any help would be greatly appreciated. -R
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[sdiy] PROM Replacement for Spider
2026-01-27 by Raf Wlodarczyk