12 Feb
2002
12 Feb
'02
7:47 p.m.
Hi all.
Many times I read with envy those phantastic finds in the US.
Now it is my time to get lucky:
- several 8- and 16-line serial MUXen with distr. panels
- Q-Bus Centronics printer interface with connector
- SC-08 Q-Bus (dual) SCSI controller (MSCP/TMSCP compatible)
with the Emulex doc and the rear connector panel
- KDJ11-A manual (0.5 inch thick)
- LA120
(with flaky electronics and both pin-feeds bands broken)
- PDP-11/73 with TK50, RD54 (Maxtor) disk and 2 M7551 memory boards
(but when powered up produced the smell of burning paper ...)
- PDP-11/93 (M8981-BA) but without documentation.
AFAIK, the 11/93 was the fastest DIGITAL PDP-11, so I consider this
a nice addition to my collection. Since the chassis only contained
in slot 1 A-B: M8981 PDP-11/93
in slot 2 A-B: M8047 grant continuity
in slot 3 A-B: M7546 TK50 controller
and the PSU of course, I moved the TK50 and the RD54 from the 11/73
into the 11/93 and added in slot 4, position A-B, the RQDX3 (M7555).
On the M8981 are 8 diagnostic LEDs, from top to bottom a yellow, 3
red LEDs, a green and 3 red ones again.
I call them yellow, red 1-2-3, green, red 4-5-6.
When the system is turned on (with HALT button in) the display on
the backpanel reads "7.7." and all LEDs on the CPU module are on.
When I push the HALT button out and press the RESTART button, the
display reads "0.4." and the LEDs are as follows:
yellow - on
red 1 - off
red 2 - off
red 3 - off
green - on
red 4 - on
red 5 - off
red 6 - off.
What does this mean?
BTW I connected a VT set at 9600 Bd to the console DB-25 connector.
Nothing appears on the screen.
The DIP switches on the backpanel are set as follows:
(left) (right)
+-----------------+
| # # |
| # # # # # # |
+-----------------+
Last piece of information I can think of is the backplane. It is
an H9278-A.
Reading what I have written, I come to think that I forgot to check
jumpers/DIP switches on the M8981 board itself ....
If necessary I can tell that tomorrow.
TIA
- Henk.
http://home.hetnet.nl/~tshaj