3 Nov
2009
3 Nov
'09
11:17 a.m.
cctalk-bounces at classiccmp.org wrote:
Hmm, ouch. :-( Is the service manual for the
'300 CPU
around? It
should tell you how to decode the message and will probably get you
down to the chip level.
Manx has a bunch of stuff, start here:
http://vt100.net/manx/details/1,1469 for the KA670 TM.
I *think* the max memory depends on the backplane, later revs
could cope with more. I *think* the CPU could always cope with
512MB.
As for testing, start (obviously) by running with any two boards,
and decide in which pair the fault lies. Then you isolate to a single
board.
Fixing that single board probably requires better diags than the console
provides (although it has been a long time and I could be wrong.
If you can isolate it to just a RAM chip, then a memory board is
probably
the simplest of all component level fixes, no?
Antonio