Many HP printers take 72-pin SIMMs ("PS/2" SIMMs). What does that imply? This is determined by the type of printer you could have. Some want SIMMs with parity, some can take SIMMs with or with out parity (SIMMs w/o parity are too much cheaper). The SIMM needs parity. Real parity, not "faux" (computed) parity. The SIMM needs to be FPM, 70ns or faster. EDO memory will work in some printers, but not all. The Presence Detect pads should be related accurately. N.B.: HP's part numbers for parity SIMMs are C2065A and C2066A (4MB and 8MB respectively). The SIMM doesn't want parity. The SIMM needs to be FPM, 70ns or sooner. EDO memory will work in some printers, however not all. The Presence Detect pads must be connected appropriately. N.B.: HP's part numbers for non-parity SIMMs are C3132A, C3133A and C3146A (4MB, 8MB and 16MB respectively). There seem to be a number of half numbers for 32MB SIMM, I have seen D2298A, D3578A and KTH-NPVEC/32.

FPM stands for "Fast Page Memory". This is an outdated memory type, often found at 70ns or 80ns. Anything 60ns or sooner stands a very good likelihood of being EDO, Memory Wave though there's 60ns FPM memory. You can't inform FPM and EDO Memory Wave Workshop apart by just trying on the module

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Pub: 09 Aug 2025 14:02 UTC

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