On October 11, John Allain wrote:
> > How come noone (not even I) has mentioned Apollo Tokenring?
>
> Maybe some of us have decided to get a life in the last month.
>
>
> Banyan VINES?
Isn't Vines a protocol, rather than a medium?
What I mean is...can't you run Vines over ethernet/fddi/whatever?
-Dave
--
Dave McGuire
Laurel, MD
>_White_ line? All IBM5151 monitors that I've seen are green-screen (in
>fact that's specified somewhere in the techref). Is this a genuine IBM
>monitor?
You know, it might be a bright green line. I haven't powered it up in
years. The only reason I didn't pitch it is because it IS a genuine IBM
monitor (the 5151), and I didn't want to seperate it from its PC... which
I wanted to keep because it was the first "IBM PC".
>Is the line vertical or horizontal. You imply the former, which is rare
>(most horizontal deflection faults kill the EHT as well, leaving a dark
>screen). If that is the case, there's only about 4 components that can be
>at fault....
I am fairly sure it is vertical. I remember when it started to die, I did
the Mac Plus analog board fix for it (whack it on the side), and that
would bring it back for a bit. Finally it just stopped coming back, and
stayed as a bright line.
Humm... maybe in November I will pull it out and see if I can get it
running. (I have too much work to do this month to get to the fun stuff).
-chris
<http://www.mythtech.net>
>If it is a Wyse 60, then I have the schematic in front of me....
>
>First question :
[snip]
ROFL... halfway reading thru all that, I suddenly had flashbacks of the
briefing from "Hardware Wars" (attack the flip flop over ride...huh?...
ya pull the plug!)
I will take a look at it tomorrow and see what some tests turn up.
-chris
<http://www.mythtech.net>
>If the daughtercard is indeed an RS422 interface, as someone
>suggested, an ordinary RS232 or RS423 terminal will probably not work.
Thanks to a link I found pointing to a reference page on wyse's web site,
I have found out MUCH more info on this.
Yes, the card is a RS422 card. Wyse even specifies that the ONLY company
that it was made for was Isoetec, and they give the part number on it
(and specify that replacements have to be bought thru isoetec). They do
imply that it can be fitted on a standard wyse 60, but don't come right
out and say that.
> RS232 and 423 are single-ended interfaces, which means that each signal
>consists of one wire plus a common ground connection. RS422 is a
>differential system, where each signal has a positive and negative
>connection. If your system is intended to connect to an RS422 terminal,
>you'd need to do some hardware hacking to make it work.
This suddenly makes all the sense in the world as to why my laptop can't
connect to it. My laptop just has a standard RS232. I will probably have
to try my Mac as it has an RS422 port on it. Otherwise, I am fairly sure
I have a 422 serial card for a PC, I can always lug a whole PC to the
site (it is at a different office, so hands on tests are hard to do... I
make a list of things to try, and do them all in one visit)
>Do you have any
>information on the pinout of the interface?
the Wyse link I came across has some info on it. IF I can track down the
tech manual for the phone system, and IF it is like the manual I have to
my 96 phone system, then it will have lots of tech info on pinouts... but
so far I have been unsuccessful in finding a 66 techmanual :-(
-chris
<http://www.mythtech.net>
Philip,
I have one shelved here it you want it for parts? Shipping only.
Phil
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Philip Pemberton
Sent: Thursday, October 11, 2001 4:38 PM
To: classiccmp(a)classiccmp.org
Subject: [possibly OT]: Citizen 120D+ interface connector and Acorn
System questions
Hi,
I've just dug out my old Citizen 120D+ 80-column dot-matrix printer,
reseated the connectors, etc. and I've managed to break a few of the pins
off the interface connector on the printer. I've bodged in a few bits of
wire to get it running, but it's a bit temperamental. Anyone know what sort
of connector Citizen used on this thing? I'm not talking about the
Centronics connector, I'm talking about the one that connects up to the
interface board. It looks like a two-row DIN41612 and has 15 pins per row
(30 total pins). There is some text on it in black ink, but I don't know if
it's relevant. It (the connector) has a 0.1" (2.54mm) pitch both vertically
and horizontally.
Anyone got a service manual for this almost-ten-year-old monster of a
printer? I'd hate to throw it away for the sake of a knackered connector...
BTW, anyone got a schematic for the Acorn Teletext Video card for the Acorn
System-series machines?
Thanks.
--
Phil.
philpem(a)bigfoot.com
http://www.philpem.f9.co.uk/
>Also note that IBM PC used the same model number series.
>
>The 5110 and 5120 were both portables like the 5100, with added features.
>We researched it before but I forgot what the 5130 is. The 5140 is the
>IBM PC Convertible. And of course the 5150 is the PC, the 5160 is the XT,
>the 5170 is the AT.
Humm... I think I might have a 5150, 5160, and a 5170 around as well
(actually, I KNOW I have a few 5170's left... but only two or three, the
rest were dumpstered, or stripped for parts). I don't think my 5150
works, but it is an original "IBM PC" (I know the matching monochrome
monitor for it is broken, just displays a bright white line down the
middle). I would have to search and see if I have a 5160, or just XT
clones (again, they might have all been dumpstered).
Yup... sitting on the other side of my desk is a 5170, the case is open,
and it is on its side, currently supporting the Wyse 60 terminal I was
questioning (and making the 5170's video card bow pretty bad under the
weight of the terminal). I know, some people might be cringing at my
abuse of it... but the ATs are worthless to me (outside of the fact that
you can stick a pentium baby AT logic board in it, and reuse the case and
power supply... I think that is where most of my 5170's went)
-chris
<http://www.mythtech.net>
Hi,
I've just dug out my old Citizen 120D+ 80-column dot-matrix printer,
reseated the connectors, etc. and I've managed to break a few of the pins
off the interface connector on the printer. I've bodged in a few bits of
wire to get it running, but it's a bit temperamental. Anyone know what sort
of connector Citizen used on this thing? I'm not talking about the
Centronics connector, I'm talking about the one that connects up to the
interface board. It looks like a two-row DIN41612 and has 15 pins per row
(30 total pins). There is some text on it in black ink, but I don't know if
it's relevant. It (the connector) has a 0.1" (2.54mm) pitch both vertically
and horizontally.
Anyone got a service manual for this almost-ten-year-old monster of a
printer? I'd hate to throw it away for the sake of a knackered connector...
BTW, anyone got a schematic for the Acorn Teletext Video card for the Acorn
System-series machines?
Thanks.
--
Phil.
philpem(a)bigfoot.com
http://www.philpem.f9.co.uk/
>The Wyse does indeed look like a 60, but I think the 55 and 35
>look similar. Had it been a 50 or a 100, it would have been a
>more obvious identification.
I have a wyse 50 (I know it is, cause the case says so). I have tried it
in place of this dead one, and it didn't work. I don't know how different
each model is from one another, but maybe since the 50 didn't work, I can
rule out a 55?
>Can you get it into Setup mode? There may be a clue there...
>it's something like Function-Setup, at least, it is on the 50...
The unit powers up and beeps like it should, but the screen doesn't
charge, so I can't see anything in the setup.
-chris
<http://www.mythtech.net>
Tony,
The machine powers up okay.....but the keyboard repeats (a bit like local
echo). If I press a key, I get two of the same character on the screen. One
appears when the key is pressed, and the other when it is released.
Any ideas ?
Rgds
Simon
-----Original Message-----
From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk]
Sent: 11 October 2001 00:25
To: classiccmp(a)classiccmp.org
Subject: Re: Research Machines Information
>
> Hi,
>
> I am looking for any information or resources relating to the UK based
> Research Machines 380Z and 480Z products. These were Z80 based micros,
> mainly used in UK schools during the mid-eighties.
I have both machines, and documentation on them. Including schematics for
the 380Z (CPU, memory, text video, hi-res video, floppy controller) and
the 480Z (machine only, but including the option board).
>
> I have a 480Z in my collection, but it isn't 100% operational and I really
> need service information to enable me to track the faulty
component.....Can
I don't have the service manual, but I do have the hardware manual. It
includes schematics. Alas my manual was mis-assembled by RML, so some
pages are missing and others repeated, but the scheamtics _are_ all there
and readable.
What is the fault?
-tony
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Thank you everyone for your help.
It looks like from pictures I am able to find (or was sent links to) that
it is indeed a Wyse 60. I think the tell tale part is the contrast slider
on the front bottom right of the screen (and the matching ID plate on the
left side).
So now I am on the hunt for a cheap replacement (looks like ebay has them
around $40), where I will open it, and see if the daughter card is
installed, if not, I will transfer mine.
I also have a lead on a wyse 60 emulator to keep on the back burner for
when my replacement terminal dies too.
Alas, I am still stuck on the Qume one, but at least I know what Qume it
is, and that one isn't half as important to me, as I can interface with
that phone system thru a programmers back door running an old copy of
ProComm Plus, so if the terminal never gets replaced, the receptionist
just has nothing cool to look at during the day.
And the #1 thing I learned from all this... when taking digital pictures,
don't put your $2000 DV Camcorder down on something without verifying
that it is stable and won't tip over (I caught the camera mid fall
thankfully... now I am out looking for the cheapest, crappy digital
camera I can find, so I can return my good camcorder to its bag and use
it only when shooting movies like it was intended)
-chris
<http://www.mythtech.net>