15 May
2010
15 May
'10
6:31 p.m.
I have a MicroVAX 2000 motherboard which boots fine unless I plug in a 4MB memory
expansion card. I already tried the following:
[1] Attempted to boot with a different 4MB card. Doesn't work.
[2] Booted a different MicroVAX 2000 motherboard with the original memory card. Worked.
So, it would seem that the problem isn't with the memory card, since the card appears
to work on another machine and another machine's card doesn't work on this
machine.
However, the odd thing is that it worked just 5 minutes ago. I know, if something's
going to fail it has to fail sometime.
Is there anything I should be looking for? Jumpers I should wiggle or anything like
that?
I'm doing this with the motherboad just sitting on the desk connected to a power
supply and console cable (a special cable with pins 7 and 8 shorted) to make it a MicroVAX
2000 console cable.
16 May
16 May
1:28 p.m.
David J. Cooper wrote:
I have a MicroVAX 2000 motherboard which boots fine
unless I plug in a 4MB memory expansion card. I already tried the following:
[1] Attempted to boot with a different 4MB card. Doesn't work.
[2] Booted a different MicroVAX 2000 motherboard with the original memory card.
Worked.
I don't have any info to offer, except to say that I have a box with
what I think is about 3-4 different
MV2000 cpu's + lots of memory. As I recall the memory is all daisy
chained with a cable on the top
of the boards (I've never worked on a mv2000, so sorry for my ignorance).
I'd me more than happy to part with these if you (or anyone else) would
like them - all I would ask is postage. I suppose I should
put them on ebay, but I can't imagine they are worth much. I'm in
Boston if you want to calculate shipping.
As I recall I pulled at least one out of a BA-123 chassis - the "coffee
table with wheels" size cabinet.
-brad
1:31 p.m.
On 5/16/10 4:28 PM, Brad Parker wrote:
David J. Cooper wrote:
I think you're talking about MicroVAX-II, not MicroVAX-2000. They
use the same CPU chip (78032) but the -2000 is a lunchbox-sized system
with CPU, memory and some peripherals integrated on one board.
-Dave
--
Dave McGuire
Port Charlotte, FL
I have a MicroVAX 2000 motherboard which boots
fine unless I plug in a
4MB memory expansion card. I already tried the following:
[1] Attempted to boot with a different 4MB card. Doesn't work.
[2] Booted a different MicroVAX 2000 motherboard with the original
memory card. Worked.
I don't have any info to offer, except to say that I have
a box with
what I think is about 3-4 different
MV2000 cpu's + lots of memory. As I recall the memory is all daisy
chained with a cable on the top
of the boards (I've never worked on a mv2000, so sorry for my ignorance).
I'd me more than happy to part with these if you (or anyone else) would
like them - all I would ask is postage. I suppose I should
put them on ebay, but I can't imagine they are worth much. I'm in Boston
if you want to calculate shipping.
As I recall I pulled at least one out of a BA-123 chassis - the "coffee
table with wheels" size cabinet. 
1:53 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Brad Parker
Sent: 16 May 2010 21:28
To: General at heeltoe.com; Discussion at heeltoe.com :On-Topic and Off-Topic
Posts
Cc: cctech at classiccmp.org
Subject: Re: MicroVAX/VAXstation 2000 Memory Problem
David J. Cooper wrote:
I don't have any info to offer, except
to say that I have a box with
what I think is about 3-4 different
MV2000 cpu's + lots of memory. As I recall the memory is all daisy
chained with a cable on the top
of the boards (I've never worked on a mv2000, so sorry for my
ignorance).
I'd me more than happy to part with these if you (or anyone else) would
like them - all I would ask is postage. I suppose I should
put them on ebay, but I can't imagine they are worth much. I'm in
Boston if you want to calculate shipping.
As I recall I pulled at least one out of a BA-123 chassis - the "coffee
table with wheels" size cabinet.
-brad
If you have MicroVAX II memory that you don't need, that would fit in a BA23
(not sure if it uses the same backplane as a BA123) then I would be happy
to take them. I am in the UK and would pay whatever postage, particularly if
you have any 8MB modules.
Regards
Rob
I have a MicroVAX 2000 motherboard which boots
fine unless I plug in
a 4MB memory expansion card. I already tried the following:
[1] Attempted to boot with a different 4MB card. Doesn't work.
[2] Booted a different MicroVAX 2000 motherboard with the original
memory card.
Worked.
5334
days inactive
5334
days old
4 comments
4 participants
participants (4)
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brad＠heeltoe.com -
david＠marmotking.com -
mcguire＠neurotica.com -
robert.jarratt＠ntlworld.com