"Matt Mc_carthy" wrote to "Roy J. Tellason" (11-23-02  01:42)
 --- on the topic of "ram parts"

 MM> One thing that really worries me, is that several of the ROM chips are
 MM> EPROM,  and back then, they were reported to have a data retention
 MM> of something like 10 years.  If one of those has quit, I'll
 MM> be out of luck for sure!  If I CAN get it running, I will
 MM> surely pull those and make 'fresh copies' for future use.

Not a bad idea, but I wouldn't be too worried about their state. I think
the 10 year figure is simply a guaranteed minimum spec, they typically
will hold data for much longer somewhere in the range of 100 years and
more. My old XT boards with eprom bios still boot perfectly. One thing
that will surely corrupt them is pluging them in backwards and that's an
easy mistake to make. BTW you might find yourself having a really hard
time locating blank 8K and 16K eproms.

 Mike
 ****

--- Maximus/2 3.01