test-drb

test-drb@ccmp.vtda.org

101090 discussions

(Fwd) Re: print-wheel/daisy-wheel printers / was Re: Apple ][*

by cclist＠sydex.com

On 15 Oct 2008 at 12:16, Brent Hilpert wrote: > I sure do remember that: as an undergrad, my first task for an OS > research project was to convert the system troff-style fixed-pitch text formatter > to support proportional font spacing. Output was to a daisy-wheel printer (don't > recall the actual printer manuf/model) using that same sort of micro-spacing feature. > > This would have been late-'79/early-'80, so the same time frame as your task. The first impact printer that I owned was a Diablo 1340 (? the one with the very noisy separate PSU). Raw 12- bit interface. I hooked it to a 3-port S-100 parallel I/O board and then went about figuring out how to make it act like a regular printer under CP/M, including bidirectional logic seeking. I even wrote up proportional spacing tables and still have the code somewhere. Sometime in the late 70's, I picked up a copy of "Proportional Spacing with WordStar". It seems that WordStar 3.0+ did have hooks for PS, but they were a bit buggy. The document I purchased (still have it if anyone's interested) gives patches and workarounds for the bugs. I used it for quite awhile. FWIW, I have a Diablo 1620 (RO, serial interface) for adoption if anyone wants to see to packing and shipping. It works. Cheers, Chuck

17 years, 8 months

Looking for Gifford's Concurrent Dos-86 for CompuPro 8-16

by trebor72＠execpc.com

I am Looking for Gifford's Concurrent Dos-86 for CompuPro 8-16. I have a set of 8" Floppies but the Files are not complete. I need a CCP/M.sys that boots to Concurrent Dos-86 V 5.0 Hopefully someone out there can help me Bob in Wisconsin

17 years, 8 months

old 386 pc, vga port - but one pin is blocked?

by oldcpu2＠rogerwilco.org

Brad Parker said: > This is something I've never seen before; I'm trying to revive an old > dead Compaq for a friend of a friend. > > I went to plug in a stock VGA cable (15 pin) and it would not go. The > connector on the Dell motherboard (this is a very very old 386) has one > pin blocked. > > Someone here must know what that means; what do I do? grab the needle > nose and hack my cable? The VGA connector specification shows that Pin 9 is not connected and sometimes used as a key, that is, blocked, see: http://pinouts.ru/Video/VGA15_pinout.shtml I doubt it would hurt any future use of the cable to pull/break the pin on your monitor cable, but if you want to keep that side of things stock, you could use a 1/32" bit and drill out the position on the motherboard's connector, to allow the pin to pass through the plastic. - Jared

17 years, 8 months

a DG /20 up for auction

by james＠jdfogg.com

> A local auction site ( Switzerland ) lists a Data General > DG/20 Micreclipse system. I believe it is rare enough to > mention here . > > I would take it but there is just so much you can tackle. > http://www.ricardo.ch/accdb/viewitem.asp?AuctionNr=550137758 That is beautiful. And small. And and probably an odd voltage for the USA. I can provide 220V, but if it requires 50hz I'm out of luck.

17 years, 8 months

DEC LA75 printer

by malcolm_h＠optusnet.com.au

Greetings from an old DEC Tech, Australia. I have a number of DEC LA 75 printers for repair. I am looking for circuit diagrams/ service manual for the LA 75 printer family. Can you help ..just a circuit diagram for the electronics board would be of assistance. Regards, Malcolm Holroyd malcolm_h at optusnet.com.au 31 Renwick Street, Marrickville. NSW Australia. 2204 Ph: 61 2 9558 7808

17 years, 8 months

Heath ET100

by mcguire＠neurotica.com

Hey folks. Does anyone here have any information about the Heath ET100 "Educational Computer"? Specifically, I'm looking for keyboard protocol information, as I have one that's lacking a keyboard, but I'd like to find any other available documentation as well. Thanks, -Dave -- Dave McGuire Port Charlotte, FL

17 years, 8 months

Keyboard for Beehive B-100?

by derschjo＠msu.edu

Hey all -- I suppose this is extremely unlikely, but does anyone have a spare keyboard for a Beehive B-100 terminal? Picked this up awhile back and it needs some repair (cap kit, etc...) but I assume that I'm probably never going to find a matching keyboard for this thing :). I'm not nearly ready to take this one on as a project, but I'm making a list of things that I'm keeping vs. things that need to get into other hands, and while I'd love to hold onto this, if I can't get a keyboard I'm never going to get any use out of it... Anyone have any leads? Thanks, Josh

17 years, 8 months

Lot of 4 VAXstation II/GPX in Mass.

by oldcpu2＠rogerwilco.org

eBay item 360098064240 I'm not usually one to spam the list, but thought someone local might be interested. Looks like a nice opening price, with no reserve. I have no relationship with the seller. - Jared

17 years, 8 months

DEC LA75 printer

by tiggerlasv＠aim.com

I've seen an assortment of LA75 printers, many "new in the box" on e-bay over the last several months.???Several were selling for $19.95, plus shipping per printer. . . I'm not sure what they're going for "today", but it might be worth looking into.? .? . T

17 years, 8 months

PLM80 V4 docs needed

by jefferwin＠gmail.com

>Jeff Erwin said the following on 10/13/2008 1:44 PM: >> OK, time again to dust off the old brains out there. I found a ("the") >> ISIS-II emulator that runs under dos, which comes with a PLM80 compiler. It >> also comes with link, locate, objhex and other goodies. The PLM80 compiler >> identifies itself as PLM80 V4. I worked on the development of the ISIS-II >> stuff at Intel in the very early 80's as well as on the National >> Semiconductor Starplex system (anyone remember that one?) so I am able to > >tinker around and remember how most of this works, but version 4 of the > >PLM80 compiler is getting the better of me. >> >Yes, I remember the Starplex. But about all I remember was that it was >NS's development system and competed with Intel's MDS. The Starplex was the NS answer to the MDS, but was much more 'late 70's' in its design. The prom programmer was built into the system, as was the screen and floppy drives. All very modular. I learned asm80 writing the editor and assembler for that beast. >> I have the PLM80 Programmer's Manual, but it is for earlier versions of the >>two-pass version of PLM80, version 4 was a single pass version that used the >>inker and locator, all of which was the precursor to the PLM86 compiler and >> tools. I believe this version came out shortly before the 8086 was >> introduced, everyone went on to the segmented world and never looked back, >> which may explain why there isn't much out there for it. I am not able to >> locate any information on this version 4 of PLM80 anywhere, and the use and >> format is definitiely different from prior versions of PLM80. >> >I've used PL/M-80 extensively in the past, but I don't remember V4 being >that much different than earlier versions. All versions of PL/M-80 that >ran under ISIS-II used the linker and locater. The only version that I >know of that didn't was the Fortran version that ran on mainframes. It >produced absolute object code, usually in the form of an Intel hex format. Version 4 was radically different from the 3.X and prior versions. The earlier versions used the $X controls, version 4 used the controls that were then used in the PLM86 compiler. Also, the DATA statement was eliminated and other language constructs were changed. PLM80 V3 code would not compile without mods. I remember it being released at about the same time the 8086 and PLM86 was was released and the effort was to make PLM80 and PLM86 somewhat similar. The PLM80 3.x docs are pretty much worthless if you are using the 4.0 compiler. 4.0 was also one executable, a big change from the PLM81 and PLM82 2-pass method the earlier versions used. >> Anyone out there have any information or pointers for me? I have tried all >> of the excellent repositories of manuals and emailed Herb, his site >> indicates that he might have what I need. Anyone have an ISIS-II set of >> manuals sitting around that can check for me? >> >I'm sure I have a version of the manual that applies to V4 of the >compiler. It *may* be in pdf form, but certainly on paper. Are there >some specific questions that you have? I'll check when I get home >tonight. At work now. I'd love to get a copy of whatever you have relative to 4.0. Emailing the PDF is probably easiest, I am more than happy to pay any costs associated. >> Specifically, I am in need of: >> >> 98-00268B plm 80 programming manual, V4 >> >> Thanks. >> >> Jeff Erwin >> >> By the way, I am running the ISIS-II emulator in a DOS box under windows, >> itself an emulator. Windows is running under Parallels on my Mac Pro which >> is running OSx. Is it possible to get further from reality here?? >> >I've done many "jobs" using that DOS emulator. It works great! And >these days it is much faster than my real MDS systems. But it isn't >nearly as elegant as the big blue box powering up, dimming the lights in >my house, and the whir of cooling fans and glow of a real crt. Oh, >those were the days. >Dave Yes indeed! The rumble of the 7Mb hard drive (14" across if I remember right) as it spun up. My favorite, of course, is the famous "Error 7, User PC = xxxx" which covered almost every error you could make...

17 years, 8 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb