billh@hp-pcd.UUCP (06/04/83)
#R:cvl:-33900:hp-pcd:13600006:000:903
hp-pcd!billh Jun 3 12:59:00 1983
Although I have no experience with this particular
add on board, I was able to add a 256K ram board to
a PC/XT recently (after populating the mother board first).
The first thing to check is that the switches are correct (both
on the mother board and on the add on ram board. The mother
board switch1 positions 3 and 4 should both be OFF. The ram
board switches should be set to respond to the address range
40000H-7FFFFH (256K-512K). Note that if it worked in a 64K
machine before, the switches are probably set to show up in the
range 10000H-4FFFFH (64K-320K). If the machine still hangs
during power on, watch the CRT for clues as to where the hangup
occurs. The new boot/self test roms display the current block
of memory being tested (or the last block that passed - I'm not
sure which).
I know this ain't much, but it is worth a try...
Bill Hunt