CPU upgrades, pt. II

From: Peter Pachla <peter.pachla_at_wintermute.org.uk>
Date: Thu Apr 13 13:14:09 2000

Anyone come across an "XTEND MICROPRODUCTS" processor upgrade card for MCA

I've found one inside my PS/2 Model 50, which I was previously unable to
identify as the markings on the PCBs are hidden inside the "sandwich"

Anyway, it appears to replace the onboard '286(?) with a '486SLC (no real
clues as to clock speed, but could be 25MHz) and has a socket next to the
processor which I'm assuming is for a math co-processor?

Would I be correct in assuming that the system will not start up if the
72-pin SIMM sockets on the upgrade board are empty....I've never gotten very
far with this machine as I don't have any 72-pin SIMMs to try in it?

  TTFN - Pete.

Hardware & Software Engineer. Sound Engineer.
Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC)
peter.pachla_at_wintermute.org.uk            | www.wintermute.org.uk
Received on Thu Apr 13 2000 - 13:14:09 BST

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