14 Aug
2009
14 Aug
'09
1:13 p.m.
PICKUP ONLY in the Seattle, WA area (I live about 15
mi north of
Seattle). I'm happy to drive out a ways (say, 2-3 hours) to meet you
Why can't things like this be near London (England)? :-)
- HP 9000/236 (works, but floppy controller is not
happy)
The real reason for my reply, for the benefit of whoever rescuses this
fine machine.
The floppy controller PCB contains a little buffer RAM, 256 bytes. It's
made of either 256*4 or 1K*4 SRAM chips, in the latter case 2 of the
address pins are tied to ground so that only 256 locations are used.
Using 1K chips seems ot be more common, and, you guessed it, they're
2114s. I've fixed a number of 9826s and 9836s by replacing those RAMs.
If that doesn;t do it, I have scheamtics...
-tony