23 Nov
2003
23 Nov
'03
6:42 a.m.
I just recieved a few DECmate III "motherboards" which are supposedly
functional (the guy is selling more of them on eBay right now, for
their Intersil 6120 chips). Before I attempt to desolder the chip,
does anyone have information on these things? I'm looking for
information on what each of the connectors is, and the pinout of the
power connector (J2) and kb/video connector (J5?). Also, any manuals
or images of software disks for this thing would be nice : ).
Here's what the connectors are labelled on my board:
J1 and J? (can't see a label for that one) are 34pin headers, and I'm
guessing go to RX50s, J3 is probably the 'expansion connector', J6 and
J4 are serial(?) and J5 is the video/kb (?). I'm fairly certain that
J2 is power, but don't know what its pinout is without playing with my
DMM... but I'd rather get it right the first time and *not* smoke the
board...
Btw, J? hangs off of the side of the board, and is a right-angle header,
unlike all the rest of the connectors.
+------------------------------------------+
| ______J6______ ____J5____ ___J4__ |
| \___DB25P____/ /___DA15P__\ \_DE9P/ |
| _____________ +-+ |
| |__34pin hdr__| |'| |
| J1 |:| |
| |:|J|
| |:|2|
| |:| |
| +------------+ +-+ |
| | | +--+
| | E30 | | |
| | DC382 | | |J?
| | | | |
| +------------+ | |
| +--+
| +------------+ __ |
| | | | | |
| | E25 | | | |
| | DC381 | ___ | |J|
| | | | 6 | | |3|
| +------------+ | 1 | | | |
| | 2 | | | |
| | 0 | |_| |
| |___| |
| |
+------------------------------------------+
--
Purdue University ITAP/RCS
Information Technology at Purdue
Research Computing and Storage
http://www.itap.purdue.edu/rcs/
23 Nov
23 Nov
8:38 a.m.
On Sun, 23 Nov 2003, Patrick Finnegan wrote:
I just recieved a few DECmate III
"motherboards" which are supposedly
functional (the guy is selling more of them on eBay right now, for
their Intersil 6120 chips).
Some people deserve to be shot. Who wants to aim
first?
--f
9:01 a.m.
From: "Fred N. van Kempen" <waltje(a)pdp11.nl>
Some people deserve to be shot. Who wants to aim
first?
That wasn't very helpful :-).
I tried to look up some info for Patrick, but my service guide info is all
at the module replacement level, with no detail about the actual boards
themselves. I could open mine up and get the answers to some of his
questions, but surely someone has a document?
Patrick, you have your work cut out for you, trying to restore those
machines :-).
You can still get working ones from time to time on eBay (that's where I got
mine). I hate to admit it, but it is my most functional and reliable
"PDP-8".
Vince
11:18 a.m.
From: "Fred N. van Kempen" <waltje(a)pdp11.nl>
On Sun, 23 Nov 2003, vrs wrote:
If you were referring to the idiot that took working DECmate-IIIs apart,
then I'll line up with you. No idea why he thought the rubble would outsell
the working machine, let alone why he wants to make a living that way.
Patrick didn't do that bit of violence, though.
From: "Fred N. van Kempen"
<waltje(a)pdp11.nl>
Well, I'm just not too fond of
'strippers'. Some people deserve to be shot. Who wants to aim
first?
That wasn't very helpful :-). (um.. that came out wrong, didn't it? :)
I suppose everyone needs to make a living. ;-)
Vince
11:26 a.m.
On Sun, 23 Nov 2003, vrs wrote:
If you were referring to the idiot that took working
DECmate-IIIs apart,
then I'll line up with you. No idea why he thought the rubble would outsell
the working machine, let alone why he wants to make a living that way.
Yes, thats
the person I meant to aim at.
Patrick didn't do that bit of violence, though.
Naah.
Fred
--
Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist
Visit the VAXlab Project at http://www.pdp11.nl/VAXlab/
Visit the Archives at http://www.pdp11.nl/
Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Sunnyvale, CA, USA
9:15 a.m.
On Sunday 23 November 2003 17:38, Fred N. van Kempen wrote:
On Sun, 23 Nov 2003, Patrick Finnegan wrote:
I've got stuff from the guy before, and he's an OK person. I asked him
if he had any complete DECmate IIIs, and he said he had one and wanted
$80ish for it (no keyboard/monitor/cables). I decided I'd just get a
couple of boards. I'm willing to bet that these are just spares he had
and wants to get rid of.
Personally, I think for $23+shipping (I actually managed to pay a bit
less), the boards are an OK buy to get either as a spare module or for
the chip to build something else from (perhaps an SBC6120?) if you can
skillfully desolder 40pin DIPs from multi-layer PCBs. Now, I get to
learn how to do that... on some 3com network cards or something. : )
Rest assured that the DECmate board will hopefully be preserved, with a
socket for its 6120.
Pat
--
Purdue University ITAP/RCS
Information Technology at Purdue
Research Computing and Storage
http://www.itap.purdue.edu/rcs/
I just recieved a few DECmate III
"motherboards" which are
supposedly functional (the guy is selling more of them on eBay
right now, for their Intersil 6120 chips).
Some people deserve to be shot. Who wants to aim first? 
9:35 a.m.
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of Patrick Finnegan
Sent: 23 November 2003 23:15
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: DECmate-III questions
I've got stuff from the guy before, and he's an OK person. I asked him
if he had any complete DECmate IIIs, and he said he had one and wanted
$80ish for it (no keyboard/monitor/cables). I decided I'd just get a
couple of boards. I'm willing to bet that these are just spares he had
and wants to get rid of.
At this point I'm pleased that both my complete DECmate IIIs were given to
me! Now to flush out a DECmate I :)
*rubs hands*
In other news I've just been offered a VT180. Anyone like to bet the current
owner isn't in the UK?
cheers
--
adrian/witchy
www.binarydinosaurs.co.uk - the online computer museum
www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(
11:04 a.m.
On Sun, Nov 23, 2003 at 11:38:40PM +0100, Fred N. van Kempen wrote:
On Sun, 23 Nov 2003, Patrick Finnegan wrote:
Personally, I recently aquired a DM-III motherboard for that very purpose.
I also removed the chip carefully enough to install a socket in the
motherboard. The board is safe on the shelf as a spare for my *working*
DM-III. The chip is with me, installed in an SBC-6120.
Chip removal is not a crime. Butchering classic boards is another matter
entirely.
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 24-Nov-2003 01:00 Z
South Pole Station
PSC 468 Box 400 Temp -43 F (-41.7 C) Windchill -45.2 F (-42.9 C)
APO AP 96598 Wind 3.7 kts Grid 103 Barometer 679.3 mb (10651. ft)
Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html
I just recieved a few DECmate III
"motherboards" which are supposedly
functional (the guy is selling more of them on eBay right now, for
their Intersil 6120 chips).
Some people deserve to be shot. Who wants to aim first? 
10:30 a.m.
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ard＠p850ug1.demon.co.uk -
dickset＠amanda.spole.gov -
pat＠computer-refuge.org -
vrs＠msn.com -
waltje＠pdp11.nl -
witchy＠binarydinosaurs.co.uk