On 25/05/2021 18:53, Zane Healy via cctalk wrote:
I’m still not 100% sure if this is a 3300 or a 3400. It’s in a BA400X chassis,
and after looking at the manuals last night, it seems like it’s closer to the
3400. My familarity with Q-Bus MicroVAXen is limited to MicroVAX/VAXstation
II’s, and a MicroVAX 3.
After getting a power cable (the only one at PCH Cables was a 3’ one, and I
didn’t want to wait for more to come in), it powered right up, but is failing 4
tests.
I quickly learned last night that “TEST 9E” prints all the tests out to screen.
This effort is making me wish I had a DEC LA50 plugged into the terminal. :-)
It starts counting down diagnostics at “41”.
27..
?57 2 17 FF 00 0000
22..
?C2 2 01 FF 00 0001
07..
?5C 2 01 FF 00 0002
06..
?5D 2 0B FF 00 0003
57 = SI_memory incr test_matter *****
C2 = SSC RAM ALL *
5C = SII_initiator ******
5D = SII target *******
I think this is indicating issues with the DSSI interface. The system has two
RF73 DSSI drives, which sound like they spin up. It also has a TK70 tape
drive. It says it has 4MB and 16MB RAM, all good.
One odd thing is that the KA640-A seems to plug into another board, before the
DSSI drives. I’m getting ready to dig into that, and find out what that board
is.
Zane
SII is the built-in DSSI interface. Is it terminated properly?
SSC is (iirc) the System Support Chip ... that may be more serious.
FWIW I think the distinction between the 3300/3400 is the size of the
box: the innards are the same. (So same as the 3500/3600 and 3800/3900
and the uV3100-30/40 etc.).
Both the uV3300 and the uV3400 use the KA640 board.
If you plug KA640 into manx you'll find two useful manuals online.
Antonio
--
Antonio Carlini
[email protected]
