Here is the pin out for the 25pin video cable on the monitor.
Connector: D25
1. horizontal sync
2. ID0 (monitor id)
3. vertical sync
4. red
5. green
6. blue
8. nothing
9. nothing
10. ID1
11. Mode0
12. nothing
13. -Degauss
14-21. gnd
22. nothing
23. nothing
24,25. +15V
for a monochrome monitor ID0 and ID1 are open
for color, ID0 is 0, and ID1 is 1, probably 5V, not 15v
I have eight different 6300s, and in every case, the monochrome systems have
the power connector plugged into the video card, and the color systems have
this connector unplugged. Also, I plugged a color monitor into one of the
systems using monochrome, plugged the power cord into the wall, turned on
the monitor, then the system and poof, the color monitor popped and went
out. Maybe it was a coincidence but now, I unplug that power connector to
the video card when I want to use a color monitor. Looking at the pin map
above, it looks like pins 24 and 25 are the hot ones, which might explain
why my color monitor popped but I'm not an electrician, so I'm not sure.
There are two other power wires that plug into the bus, where it connects to
the motherboard and video card, so I assume that is where the rest of the
system gets it's power.
Olivetti may have licensed the 6060 from Xerox but the Xerox 6400 is a
knockoff of the 6300, which is a knockoff of the Olivetti M24 (?) -the
boards inside even say Olivetti on both the 6300 and 6400. These two systems
are based on what I believe is the Olivetti M24 (1984.)To tell you the
truth, I know that Olivetti produced this system for both AT&T, and Xerox
but I'm not sure who designed it.
http://www.obsoletecomputermuseum.org/oliv_m24.html
http://www.obsoletecomputermuseum.org/att-6300.html
Ernest
-----Original Message-----
From: owner-classiccmp_at_classiccmp.org
[mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of Merle K. Peirce
Sent: Sunday, February 13, 2000 5:58 PM
To: classiccmp_at_classiccmp.org
Cc: classiccmp_at_classiccmp.org
Subject: RE: AT&T 6300/Xerox 6400
I thought the Olivetti was Xerox's 6060? It's an elegantly beautiful
machine, with the styling improved over the 6300, but all minor changes.
I have only seen two myself, a stripped carcass, and an almost mint set
with software that we were given.
On Sun, 13 Feb 2000, Ernest wrote:
> Xerox licensed the 6300 system from AT&T, repainted it, and called it the
> 6400. The machines are mostly identical inside and out, except for the
> coloring. The Xerox is a little newer.
>
> I know of a place, here in Seattle, that has lots of 6300 monitors and
> keyboards for very cheap so if anyone buys the 6300 at San Antonio, I can
> gather up the extra parts that you would need and ship them to you for
cost
> plus shipping -maybe $30 to $40 total, and as I said before, I also have a
> the ATT MSDOS, and other software so that's available also. I even have an
> extra mouse that I could sell, for the right price.
>
> The 6300 is a funky machine but you won't see to many of them around in
> working condition. Everything about them is proprietary, but you can add 8
> bit ISA cards.
>
> -----Original Message-----
> From: owner-classiccmp_at_classiccmp.org
> [mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of Ernest
> Sent: Sunday, February 13, 2000 3:04 PM
> To: classiccmp_at_classiccmp.org
> Subject: RE: Available in San Antonio, TX, moderately boring stuff.
>
>
> You can plug other old monitors into it if you get an adapter, however
there
> are a couple of things that you should know first.
>
> The monochrome monitor does get it's power from the video card but if you
> open the case, and unplug the little orange/black power plug off of the
> video card, you can then plug the AT&T color monitor into it. If you don't
> unplug the video power plug first, you will melt your color monitor. If
you
> do a search for AT&T 6300 on altavista, you'll get a bunch of pin maps for
> the 6300 video and keyboard plugs.
>
> Also, if anyone is interested, I have a bunch of 6300 software, including
> the hard to find keyboard mouse drivers. I also have UNIX System 5 release
2
> for the 6300+. I can make copies for you. Does anyone else have any
unusual
> 6300 software -I have a little ATT product catalog which lists tons and
tons
> of 6300 series software and add on parts.
>
> Ernest
>
> -----Original Message-----
> From: owner-classiccmp_at_classiccmp.org
> [mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of Tony Duell
> Sent: Sunday, February 13, 2000 11:27 AM
> To: classiccmp_at_classiccmp.org
> Subject: Re: Available in San Antonio, TX, moderately boring stuff.
>
>
> > picking it up. Also the 6300s need special monitors with 15 (or 25?)
pin
> > connectors.
>
> IIRC, it's a DB25 connector, and it carries the (12V) power for the
> monochrome monitor, so plugging anything else into the monitor socket is
> a very bad idea.
>
> -tony
>
>
>
M. K. Peirce
Rhode Island Computer Museum, Inc.
215 Shady Lea Road,
North Kingstown, RI 02852
"Casta est qui nemo rogavit."
- Ovid
Received on Sun Feb 13 2000 - 22:37:49 GMT