6 Aug
2015
6 Aug
'15
6:22 p.m.
Four, I expect:
CPU, Memory, VAX Interface, Floppy Controller.
I have one in pieces floating around here somewhere.
One of those puppies (probably the one I have) held our VAX hostage for
DAYS while the service folks from the OEM (Intergraph) tried to figure
out what was wrong - they kept blaming the console processor which was
not the problem. Turned out to be a recently added power supply - which
I had pointed out to them was something that changed, and something we
could do without as a test. Sigh.
On 8/6/2015 7:13 PM, Jon Elson wrote:
On 08/06/2015 04:01 PM, Jay Jaeger wrote:
Until that console processor fails with no
backups. I seem to recall
having 4 or 5 "backups" (aka operators). ;)
Well, the idea is that the console or diagnostic processor is WAY
simpler than the mainframe CPU. So, if the console computer dies, you
can troubleshoot it and be sure it is running in just a few minutes, and
then get on to the real problem.
The VAX 11/780 had an LSI-11 with a floppy controller and an interface
board to the VAX, so I think it was down to 3 boards or something.
Jon