13 Aug
2015
13 Aug
'15
8:24 a.m.
On 08/13/2015 09:40 AM, dwight wrote:
If you can write your own code, usually a simple write
and read
sequence will find a dead RAM.
Memtest 86 ought to run on that machine. (Might
have to
find a very old archived version, but any version that will
boot from floppy ought to run on it.) Then, you only have
to figure out which row of chips is which bank, and which
column is which bit. Depending on what docs exist, that may
not be real easy. Last resort is to trace wires on the
board to see which chips are wired to which bus lines and
address decoders.
Jon