17 Dec
1999
17 Dec
'99
3:37 p.m.
See comments below.
-----Original Message-----
From: Chuck McManis <cmcmanis(a)mcmanis.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, December 17, 1999 9:01 PM
Subject: H9278-A is this Q/CD or Q/Q
I'm trying to bring a Vaxstation 3200 back to life.
It had been depopulated
but I've got all the boards. It is in a BA23 chassis. Now my previous
experience with uVAXen in BA23's was that the first 3 slots were Q/CD and
the rest were Q/Q with a serpentine bus. However trying to set up the
boards this way yielded some very strange results. Not the least of which
was no response by the disk controller.
Caused by the blank in slot 2
The other oddity was the dual hard drive control
switches on the panel. The
chassis is marked:
VS31V-B2
Which the module database lists as:
650QV-A2,CLR,MS650-AA,VCB02,DELQA-M,CK-DELQA-YP,2 M9047,BC18Z-25,120V
If I read this correctly, then the stock configuration on this box was:
1 KA660 ----------------
2 clear
3 MS650-AA -------------Move up to 2 and insert grant here (M9047) on left
side
4 VCB02
5 VCB02 (4 plane)
6 VCB02 (4 plane)
7 DELQA M09047
8 M9047 ??? Insert disk controller here.
The backplane is marked Micro-11 and H9278-A which is described as:
Q22 BUS BACKPLANE, 8 QUAD SLOTS
Which sounds a whole lot like Q/CD all the way down to me. Anyone know for
sure? I'll be trying it out shortly so I may figure it out empirically. :-)
Slot 1,2 and 3 have the grant on the left. The right side is reserved for
memory interconnect.
I guess the real question is "Quad slot" code
for "Q/CD" slot?
No - Quad wide connector.
Q/CD has the right side "reserved" like on a ba213.
Q/Q is the serpentine section
Dan
--Chuck