I’ve come into an HP-Apollo 9000/425t which uses memory boards with 72-pin 
headers rather than using SIMMs.

Based on what I can see in pictures online, the boards themselves don’t appear 
to be anything special (they just carry TMS444000 etc. DRAM) and the 
connections aren’t anything special either, so I figure it shouldn’t be hard to 
design a SIMM adapter.

Does anyone have or know where I could find the pinout and timings?

  -- Chris

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