On Wed, 25 Dec 2002, Gunther Schadow wrote:
Jonny's boot com file helped a little. At least I
now know that
something doesn't work (and not just me not knowing what to do :-)
Assuming that you have a working disk... :-)
Glad the file came through. Seems some virus catchers are of the opinion
that my
boot.com is a virus. :-)
Although it's still looking pretty bad. I'm
afraid the cold
garage is causing some damage to the VAX. I did run the TEST
again and got an error where I didn't get one last time. Now
it complains that M8230 is defective ...
That's definitely a bad sign.
This time I got up until a "BOOT-F-Unexpected
Machine Check" somewhere
inside VMB.EXE running.
Okay. So VMB is running. That's good news. Do you have any kind of system
on any disk, that should boot (Ultrix, VMS, 4.3BSD ?).
I could never see any sign of special
activity, neither from the RA90 drive nor the UDA-50.
It would flicker very briefly, but I suppose you should see some
action. Anyhow, the A or B button should light up if things are working.
I assume you have the cabling correct. You know. The total number of
cables between the UDA-50 and the disk must be an odd number.
And that you have the A and/or B channel selected (matching your cables
connection).
The UDA-50
shows the cycling pattern on the LEDs, not unlike the KDA-50 in
my VAX6000s.
That's the normal idle pattern. Shows that the UDA-50 is working
correctly.
It could be that I messed up the UDA-50s hardware
address, so it may never be talked to. Is there a way of examining
UNIBUS addresses from the console, so that I could see if some
magic number comes up at a certain address on the UDA-50 that
would indicate that I have the right hardware address?
Yech. Yes, it can be done. No, I won't try to tell you how. Perhaps
someone a little more familiar with the unibus map and all the stuff can
help out (probably ragge, or someone else who have played exensively with
it). I'm just happy I don't have to. I could probably figure it out if I
had to, but it's a minor headache.
Basically you have to just configure the unibus map, and then find the
UDA-50 in the address range that UBA have. The UDA-50 should be at 772150
(8) in that range.
As for VMS, at this time I have the VMS 5.2 disk
hooked on the
780, and I would gladly take VMS for now if it would get that
far at all.
Well, if you have a known working VMS disk, set it to write protect, and
then try booting it.
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol