11 Nov
1997
11 Nov
'97
2:55 p.m.
The BUS ERROR wasn't from the card not being installed. I reinstalled
everything, and it refuses to boot.
Apparently, I've snipped the wrong wires on the UDA50 slots.
Or forgotten to plug things in...
No, that's not it. EVerything's plugged in, the lights on the UDA strobe,
I've cut the wrong pins and boogered this up worse.
I really should stop destroying these machines and just pass them on to
more capable people...
But I like them too much. Where are the pins I am SUPPOSED to have
clipped? I'll rejumper the old ones, it doesn't look hard...
11 Nov
11 Nov
3:10 p.m.
On Tue, 11 Nov 1997, Daniel A. Seagraves wrote:
-tony
The BUS ERROR wasn't from the card not being
installed. I reinstalled
Can you halt the CPU (RUN light off) from the panel? If not, then you've
probably got grant problems. Try pulling the terminator (M9302 card, I
think - anyway it's in the far left slot). If you can now halt the CPU
from the panel, you've certainly got grant
problems.
everything, and it refuses to boot.
Apparently, I've snipped the wrong wires on the UDA50 slots.
Or forgotten to plug things in...
No, that's not it. EVerything's plugged in, the lights on the UDA strobe,
I've cut the wrong pins and boogered this up worse.
These things happen. Remember 'The designer who never blew a chip is a bad
designer. He never designed anything'. That was said to me years ago, and
I've lived by it ever since. You don't want to see a list of the stupid
mistakes I've made...
I really should stop destroying these machines and
just pass them on to
more capable people...
Nonsense. The only way to learn is by doing...
But I like them too much. Where are the pins I am
SUPPOSED to have
clipped? I'll rejumper the old ones, it doesn't look hard...
OK. They're on the 3rd connector from the back (2 connectors behind them,
3 in front). They're the rearmost 2 pins on the righthand side (looking
from the _TOP_ of the backplane). You'll find
they're linked by a little
loop of wire close to the backplane. That's what
you should have cut.
What, in fact, did you cut?
12 Nov
12 Nov
4:57 p.m.
On Tue, 11 Nov 1997, Tony Duell wrote:
On Tue, 11 Nov 1997, Daniel A. Seagraves wrote:
Can you halt the CPU (RUN light off) from the panel?
If not, then you've
probably got grant problems.
That's it. When I push CTRL/HALT, I get BUS ERR.
Try pulling the terminator (M9302 card, I
think - anyway it's in the far left slot). If you can now halt the CPU
from the panel, you've certainly got grant problems.
Okay... You're right. I've got grant trouble.
OK. They're on the 3rd connector from the back (2
connectors behind them,
3 in front). They're the rearmost 2 pins on the righthand side (looking
from the _TOP_ of the backplane). You'll find they're linked by a little
loop of wire close to the backplane. That's what you should have cut.
What, in fact, did you cut?
I have to look later, I have work to do.
6:31 p.m.
On Tue, 11 Nov 1997, Tony Duell wrote:
OK. They're on the 3rd connector from the back (2
connectors behind them,
3 in front). They're the rearmost 2 pins on the righthand side (looking
from the _TOP_ of the backplane). You'll find they're linked by a little
loop of wire close to the backplane. That's what you should have cut.
What, in fact, did you cut?
4th set from the frontpanel, pins 1 and 2 closest to the PSU.
PSU
6
5
4 \
3
2
1
13 Nov
13 Nov
3:25 a.m.
On Wed, 12 Nov 1997, Daniel A. Seagraves wrote:
-tony
On Tue, 11 Nov 1997, Tony Duell wrote:
It sounds like you cut the right thing. I think it's high time we used the
official DEC naming of the pins to avoid confusion (Should this go in a
FAQ somewhere??)
OK. The complete hex slots are _numbered_, starting with 1 on the far
right. In an 11/34 the CPU boards are in slots 1 and 2.
The individual subslots (6 to a slot here) are lettered, with A nearest
the PSU and F nearest the front panel in this machine. If you pull a
card, set it down component side up, edge fingers towards you, then A is
on the right, F on the left
The pins in the slot are also lettered, using DEC's alphabet which avoids
characters that could be confused. Starting at the back (PSU side), they
are called : A B C D E F H J K L M N P R S T U V.
The sides of the board are numbered. Side 1 is the component side, Side 2
is the solder side.
Now, you want to cut the jumper between CA1 and CB1 (the 2 pins are on the
same connector). So, that's on the 3rd connector from the PSU (2 between
it and the PSU, 3 between it and the front panel), the rearmost (closest
to the PSU) 2 pins on the component side of the board.
Can you find it from that description?
Just one quick thing. Pull the UDA50 cards. Check that (a) one of the
cards (I think it's the one without the disk cable) has traces from those
2 pins going into the logic and (b) the other card has these 2 pins
shorted together.
OK. They're on the 3rd connector from the
back (2 connectors behind them,
3 in front). They're the rearmost 2 pins on the righthand side (looking
from the _TOP_ of the backplane). You'll find they're linked by a little
loop of wire close to the backplane. That's what you should have cut.
What, in fact, did you cut?
4th set from the frontpanel, pins 1 and 2 closest to the PSU.
PSU
6
5
4 \
3
2
1
4:11 p.m.
On Thu, 13 Nov 1997, Tony Duell wrote:
The individual subslots (6 to a slot here) are
lettered, with A nearest
the PSU and F nearest the front panel in this machine. If you pull a
card, set it down component side up, edge fingers towards you, then A is
on the right, F on the left
Alright.
The pins in the slot are also lettered, using DEC's alphabet which avoids
characters that could be confused. Starting at the back (PSU side), they
are called : A B C D E F H J K L M N P R S T U V.
OK
The sides of the board are numbered. Side 1 is the
component side, Side 2
is the solder side.
Now, you want to cut the jumper between CA1 and CB1 (the 2 pins are on the
same connector). So, that's on the 3rd connector from the PSU (2 between
it and the PSU, 3 between it and the front panel), the rearmost (closest
to the PSU) 2 pins on the component side of the board.
Can you find it from that description?
Uhh... That's what I already cut.
Looks like something WORSE is screwed up...
Just one quick thing. Pull the UDA50 cards. Check that
(a) one of the
cards (I think it's the one without the disk cable) has traces from those
2 pins going into the logic and (b) the other card has these 2 pins
shorted together.
The board with the drive connector has them shorted, and the one without
the cable has them going off into the logic.
4:16 p.m.
New subject: DEC Rainbow 100
What is this? I have one.
Some guy brought it in, said it was an XT he got at a garage sale, and
wanted it upgraded. Bought it for $10.
No video or whatever...
Is it a PDP relative?
12 Nov
12 Nov
6:33 p.m.
On Tue, 11 Nov 1997, Tony Duell wrote:
OK. They're on the 3rd connector from the back (2
connectors behind them,
3 in front). They're the rearmost 2 pins on the righthand side (looking
from the _TOP_ of the backplane). You'll find they're linked by a little
loop of wire close to the backplane. That's what you should have cut.
Do you mean back as in PSU side or back as in frontpanel side?
13 Nov
13 Nov
3:27 a.m.
On Wed, 12 Nov 1997, Daniel A. Seagraves wrote:
Do you mean back as in PSU side or back as in
frontpanel side?
Back == towards the PSU. I almost always give locations as if you're
standing in front of the machine (frontpanel nearest to you, PSU away from
you) with the machine the right way up.
You did cut the jumper on the right 2 slots, I assume. It's easy to make a
mistake and go one slot further over.
-tony
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