test-drb October 2001

test-drb@ccmp.vtda.org

259 participants
770 discussions

ArcNet and the Pursuit of Multiple Topologies

by mcguire＠neurotica.com

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

22 years, 8 months

Looking for : IBM 5110 Serial IO adapter software`

by mythtech＠Mac.com

>_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>

22 years, 8 months

IDing WYSE terminal

by mythtech＠Mac.com

>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>

22 years, 8 months

IDing WYSE terminal

by mythtech＠Mac.com

>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>

22 years, 8 months

[possibly OT]: Citizen 120D+ interface connector and Acorn System questions

by pjschilling＠gcstech.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/

22 years, 8 months

Looking for : IBM 5110 Serial IO adapter software

by mythtech＠Mac.com

>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>

22 years, 8 months

[possibly OT]: Citizen 120D+ interface connector and Acorn System questions

by philpem＠bigfoot.com

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/

22 years, 8 months

IDing WYSE terminal

by mythtech＠Mac.com

>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>

22 years, 8 months

Research Machines Information

by Simon.Hardy＠hemel-hempstead.sema.slb.com

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 ___________________________________________________________________________ This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of SchlumbergerSema. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please notify the SchlumbergerSema Helpdesk by telephone on +44 (0) 121 627 5600. ___________________________________________________________________________

22 years, 8 months

IDing WYSE terminal

by mythtech＠Mac.com

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>

22 years, 8 months

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test-drb October 2001