9 Mar
2016
9 Mar
'16
11:29 a.m.
-----Original Message-----
From: cctech [mailto:cctech-bounces at classiccmp.org] On Behalf Of Dr.
Roland Schregle
Sent: 09 March 2016 18:27
To: ClassicCmp Tech <cctech at classiccmp.org>
Subject: Options for resurrecting VAX 4000/400 and Vaxstation 3200
Dear all,
I have two VAXen that I'd like to resurrect simply for the sake of playing
around with The Real Thing[tm] running VMS. Note that I'm completely new
to VMS and DEC hardware -- hence the interest!
Box #1 is a VAX4000 model 400 with no working CPU (KA-675) and 2x 32Mb
RAM, an RF72 (wiped), plus a KZQSA QBUS controller. PSU is good, fans
squeal on startup but run silently once spun up. Have VMS installation media
in CD.
I have two KA-675s for this beast: Board #1 (originally installed) has a failed B-
cache (console reports SUBTEST_35_12, DE_B_Cache_diag_mode.LIS) and
crashes with an asynchronous write memory failure when booting VMS from
CD. Board #2 (DOA from eBay but fully refunded) has a dead DSSI bus 0
controller and crashes on SHOW DEV; I assume that's a write-off. Any chance
of identifying the flaky B-cache SRAM on board #1 and replacing it?
Alternatively, anyone out there have a KA-675 for sale?
Box #2 is a VAXstation 3200 with TK50, and an RD54. PSU and fans ok (and
very quiet), ditto CPU. The RD54 is unformatted; I understand this can only
be formatted in the field with a VS2000 or with some obscure field
diagnostics. There's no SCSI controller, so I can't install from CD. I
haven't
been able to track down VMS installation media on TK50, and I doubt they'd
still be readable anyway. On top of that I have no idea what condition the
drive is in, as I have no blank tapes to test with. I've found tape images online
but see no way to dump these to TK50 (assuming the drive is ok), unless I get
a TZ30.
What are my options and chances of success for getting either of these
boxes up and running with VMS? A KA-675 and TZ30 can be obtained from
resellers, but I hesitate to invest several hundred in something this old purely
for the occasional mucking about. I have also considered selling the units (or
parts thereof) if nothing gives.
Any ideas much appreciated,
You could run the 3200 by netbooting it from a SIMH instance of VMS. If the RD54 was
formatted (and working!) then you could transfer VMS onto the disk from the boot node. To
format the RD54 you would need to find a 2000 though, or at least borrow one. You should
tell the list where you live as there might be someone close by who could help out. It
might be though that the RD54 is formatted, worth trying once you netboot.
As for the KA675, I don't know really, I suspect you would be into surface mount work,
but with two boards you might be able to swap bits around to get a working board. Perhaps
if you got a KFQSA or a KZQSA you could get this to work?
Regards
Rob