Wang PC260 memory fault

Jon Elson elson at
Thu Aug 13 10:24:43 CDT 2015

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.


More information about the cctech mailing list