test-drb

test-drb@ccmp.vtda.org

101090 discussions

by imp＠bsdimp.com

Greetings I'm looking for any and all information I can find on the DEC Rainbow ethernet cards. I know for sure that two exist, both plugged into the communications slot that most rainbows have filled with a hard disk controller. DEC made one, and Univation made the other. Univation also advertised a ARCnet card, but I found that only in one issue of Digital Review and the next issue moved up to Ethernet. So far all I've been able to find is DECnet DOS/Rainbow 1.0 which might have drivers for the former on it. I've seen no trace of the latter. Also, is there a convenient way to extract teledisk disks these days to something like an image file on Linux/FreeBSD? MAME almost can do this (I can read it in with the Rainbow emulator and diskcopy to a flat file that I can then examine), but I was hoping there was a tar-like tool to do the deed. Warner

4 years, 7 months

Linearizing PDF scans

by jdbryan＠acm.org

On Monday, August 16, 2021 at 22:46, Wayne S wrote: > I asked because i was curious if what you wanted to do could not be > done in Acrobat. Never having used Acrobat, I cannot say. -- Dave

4 years, 7 months

IBM PC diagnostics disks

by rsmilward＠frontier.com

I have these 5-1/4" diagnostics disks but no need for them. If you're interested, I'll send them to you for the cost of the postage from Durham, NC. * Diagnostics for IBM Personal Computer AT, ver. 2.03 copyright 1981, 1986 maroon disk label, p/n 6183111 * Advanced Diagnostics, ver. 2.20, copyright 1981, 1986 dark blue label, p/n 6139804 They are in excellent physical condition. Sorry, I don't have the manuals. (I used to work for a ComputerLand store in '81-'82 and probably acquired them there.) They might be available for download somewhere, but these are the physical, displayable versions. **Richard

4 years, 7 months

WTB: Amiga 3000 front/floppy

by ethan＠757.org

Scored an A3000. Prior owner cut a hole where the floppy goes and mounted a PC floppy in there. Looking for an original front plate and the matching floppy drive to restore machine to original look. - Ethan

4 years, 7 months

30 yrs. ago

by c.murray.mccullough＠gmail.com

30 years ago this month the IBM PC debuted at $1565. Some say this began the era of mass-computing and it is now what classiccmp.org <cctalk at classiccmp.org> is all about! For those interested in the OS world LINUX is 30 years old. Time has passed but this is what classic computing is all about. Happy computing. Murray ?

4 years, 7 months

VT101 free to good home, pick up in w. Oregon

by invi＠vivaldi.net

It was sitting in the trash. No keyboard, no power cord. Case was open and some of the bundles of wires inside are disconnected, so I doubt it's in working condition. I'm not much of a hardware collector, so I was hoping to put it in the hands of someone who would like it.

4 years, 7 months

30 yrs. ago

by c.murray.mccullough＠gmail.com

My apologies. ? It was 40 years ago that the IBM PC became a retail computer this month. Murray ?

4 years, 8 months

How do CRT's age?

by healyzh＠avanthar.com

Odd question, how well do CRT?s age? Just the CRT, if what I think exists, is actually there, they?ve never been in Oscilloscopes. Zane

4 years, 8 months

ISO Laserjet I/II/III firmware

by charlesmorris800＠centurytel.net

On 8/13/21 7:00 PM, cctalk-request at classiccmp.org wrote: > Message: 1 > Date: Thu, 12 Aug 2021 13:10:43 -0400 > From: Ethan Dicks<ethan.dicks at gmail.com> > To: Al Kossow<aek at bitsavers.org>, "General Discussion: On-Topic and > Off-Topic Posts"<cctalk at classiccmp.org> > Subject: Re: ISO Laserjet I/II/III firmware > Message-ID: > <CAALmimnjndcx5G0mPoP7sPb-c+Aocibms_RfCDQFW7aA5bPs3A at mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > On Thu, Aug 12, 2021 at 10:48 AM Al Kossow via cctalk > <cctalk at classiccmp.org> wrote: >> I suspect interest in emulating them will die out once they get past the 68000 models. > I may still have a II, and I definitely still have at least one > (functional) III and a 4Si > > I still use my 4M/L all the time - Postscript + LocalTalk + IEEE1284. > It's a great little printer. > > -ethan I have a IIp+ that I got for $2 at a hamfest around 15 years ago... I have repaired it several times (most recently, visibly bad electrolytics in the switching PS startup circuit). In fact that's the second time the power supply has failed - the first time was years ago and I just replaced the board. Now it's crinkling the bottom of pages... there used to be a kit to fix that. I love those old "bricks". Although mine is like my grandfather's axe (new head and new handle but it's still my grandpa's axe) :) The trick nowadays is finding toner cartridges that weren't just refilled, but actually rebuilt (with a new wiper blade). -Charles

4 years, 8 months

Early '80s Motorola Semiconductor Reference - anyone?

by bear＠typewritten.org

Anyone have an early ?80s Motorola semiconductor reference manual? I am attempting to repair a Boschert power supply from ~1983 that is full of Motorola parts marked as 1027 (DO-42ish), 1077 (TO-3ish), 1078 (DO-5ish), etc. It would be extremely helpful to know their specifications, or ideally how to cross-ref them to ?standard? parts. ok bear.

4 years, 8 months

ISO Laserjet I/II/III firmware

by aek＠bitsavers.org

There has been some work going on emulating early Laserwriters in MAME and I was wondering if anyone still has boards or firmware dumps from Laserjets. It seems most have been scrapped. "nobody collects printers"

4 years, 8 months

howto bitsavers BASIC-11 v2 disk image under simh

by fritzm＠fritzm.org

Hi folks, Could anybody spare a clue or some suggestions on how to access the contents of: http://bitsavers.trailing-edge.com/bits/DEC/pdp11/floppyimages/rx02/BASIC-1… under simh? I haven't had any luck mounting the contained BASIC.DSK e.g. on simh RY under RT-11. Looking through a dump of the image, there seems to be an "RT11A" signature. Tried putr under dosbox as well, but it seems to hang mounting the image. Suggestions appreciated! --FritzM.

4 years, 8 months

DQ11 prints needed

by jnc＠mercury.lcs.mit.edu

> From: Jay Jaeger > BTW, I have only the sales brochure for the DM11, near as I can tell. > 114X-00871-1715/J . If you want me to drag the box of sales lit from > the garage, and scan it, me know - could do it next week. No major need for it; I found the DM11-AA Tech Manual in my PDP-11 fiche set. So I doubt the brochure would answer any of the remaining questions; we'd probably need the Engineering Drawings for that. But there's so little on the DM11, it might be interesting to see the brochure. The big issue with the TM is that it has the same erroneous diagram for i) the boards in the DM11-A, and ii) their locations in the backplane, as the one in DEC-11-HDMBA-A-D, "DM11-BB modem control option manual", on pg. 1-5. The diagram there lists: M7245 Transmitter E M7244 Transmitter D M7245 Receiver M7242 Control C M7241 Control B M7240 Control A So two 'M7245's, with different functions listed! And no M7243... The DEC "Spare Module Handbook" shows: M7243 "DM11 transmitter D" M7244 "DM11 transmitter E" M7245 "DM11 receiver" so the M7245 probably _is_ the receiver; but this list shows that the 'transmitter E' card is the M7244, not the M7243 (as would be if the top line >from the module diagram had a typo '5' for '3'. Hence my observation that it would probably take takethe ED tostraighten thins out. But as I said recently, no real need; the thing is a total canine, and I doubt very much that there are any left in the world. Noel

4 years, 8 months

MTI MXV22M

by glitch＠glitchwrks.com

Does anyone have experience running the MTI MXV22M? It's a dual-height QBus card that emulates RX02 but uses a 5.25" 96 TPI drive. I've got a small heap of them and we're trying to get them going. When trying to format diskettes using the process documented in the manual, the drive selects for maybe a second then deselects, and we get a drive not ready error. The controller isn't using the ready line, as the SA-460 for which it is designed doesn't supply it. No traces physically connect to pin 34. Since we're close to out of ideas, we've also plugged in a pair of Shugart SA-800s, on the idea that maybe the MXV22M is close enough to the MXV22 to show some signs of life. It doesn't give a drive not ready error, and it will step the heads like it's really formatting, but never loads the heads. Happy for any input on this one! Thanks, Jonathan

4 years, 8 months

CPU Tests

by david＠thecoolbears.org

My KA655 CPU is freezing during the power up sequence, after test number 04: KA655-B V5.3, VMB 2.7 Performing normal system tests. 40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25.. 24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09.. 08..07..06..05..04.. Any suggestions as to what might be wrong?

4 years, 8 months

Atari 800 to C64

by kl＠2k.ca

https://redd.it/p24fo8 Turns ur 800 in a c64. Cool

4 years, 8 months

Xerox 820/II 8/16 Prom/Eproms ( Masters ) on e-bay

by Mark＠Misty.com

Hi, I'm not prepared to lay out $200 for these Xerox ROMs, but if I do manage to get them, I'll read and share them. I did not know there were 5.0 ROMs for the 820-II, but it appears there were, and they are included. https://www.ebay.com/itm/184980603844 Mark -- Mark G. Thomas <Mark at Misty.com>, KC3DRE

4 years, 8 months

Xerox 820/II 8/16 Prom/Eproms ( Masters ) on e-bay

by Mark＠Misty.com

4 years, 8 months

DQ11 prints needed

by jnc＠mercury.lcs.mit.edu

> From: Jay Jaeger > ROTFL - especially given the earlier case, and since Noel knows about > you folks quite well.. The joke's actually on you: DQ11_RevL_Engineering_Drawings_Aug75.pdf 2021-08-09 14:05 ^^^^^^^^^^^^^^^^ I'd actually looked in http://bitsavers.org/pdf/dec/unibus earlier that morning (before I sent my request), and by chance I still had that browser window open. I suppose I could have done a screen-shot... > From: Al Kossow >> You aren't by any chance sitting any DM11-AA manuals, are you? :-) > probably. there are still quite a few drawings to go through That was mostly a joke. I mean, there are no DM11-AA documents of any kind online, so it would be interesting to get some (there are still a few un-answered questions); but there's a good DM11 entry in "pdp11 peripherals and interfacing handbook", 1972 edition, that enabled me to produce a decent entry: https://gunkies.org/wiki/DM11_asynchronous_serial_line_interface which is probably more than good enough - the interface is actually a dog, I doubt any still exist. Noel

4 years, 8 months

PC floppy disk sets avaialble free

by mike_t_norris＠hotmail.com

Hello, During a clear out I found the following floppy disk sets, I am not sure if they are of any use to anyone: Pathworks V5.1 (35 disks) plus LAN Mgr Setup - these are copies not originals Mastering Windows Programming with Borland C++4 (Sams - don't have the book though!) Borland SQL Link for Windows for Interbase 3.3 (3 disk) Paradox for Windows V 4.5 (2 disk) Paradox for Windows Object Converters for Forms (1 disk) Turbo C++ for Windows 3.1 (7 disks) Proto Gen V2.2 (1 disk) Adaptec 7800 Family Manager Set for Win NT 3.5 or Win 95/98 (3 disks) CDs - Adaptec EZ-SCSI Deluxe Edition V5 Easy CD Creator & DirectCD All are untried and I have no means to read them, but have been stored in a clean environment, some still in their original wrapping, free except for the cost of postage (I am in the UK). Regards Mike Norris

4 years, 8 months

DQ11 prints needed

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > Date: Mon Aug 9 14:05:07 CDT 2021 Wow! That was _amazing_ speed, to get that uploaded so quickly (even if you had already scanned it in), considering I only posted my request at 14:32 EDT! Thank you very, very much: that allowed me to complete the DQ11 page on the CHWiki: https://gunkies.org/wiki/DQ11_NPR_Synchronous_Line_Interface The MM was unclear on many points (including the backplanes; the MM says, in 2.3.1.2, "double-system unit", making it sound like the option version uses a 9-slot backplane, but it's actually two 4-slot units). You aren't by any chance sitting any DM11-AA manuals, are you? :-) (The weirdest interface I've ever seen; the shift registers are kept in main memory, resulting in many DMA cycles _per character_.) Noel

4 years, 8 months

DQ11 prints needed

by jnc＠mercury.lcs.mit.edu

Anyone have a set of DQ11 prints? The DQ11 MM is missing some important info, which is apparently only on the prints. Noel

4 years, 8 months

r.stricklin: regarding SysV/68 and SysV/88 tapes

by matti.nummi＠hotmail.fi

I have tried to reach You Raymond. Presumably You have following tape images: Sys V/68 Graphic Services Extension R3V6 XW02.10(IR06) Sys V/88 R3.2V1.2C BOS Obj UZ88.01 We are trying to build a X environment with some success already for Motorola MVME unix computers. These tapes could help. Can You comment on this (privately). BR Matti Nummi matti dot-char nummi at-char hotmail dot-char fi

4 years, 8 months

Bell vs gray. The Telephone wars and invention.of telephone etc. History chan. tonight check your TV schedule.

by couryhouse＠aol.com

Bell vs gray. The Telephone wars and invention.of telephone etc. History chan. tonight check your TV schedule. Sent from the all new AOL app for Android

4 years, 8 months

Help reading a 9 track tape

by len＠shustek.com

> On Aug 5, 2021, at 8:39 AM, Jay Jaeger via cctech <cctech at classiccmp.org> wrote: > I know Paul well (we were contemporaries at U. WI). He does not do that very often. He did not indicate any issue with a fire at the building that contains his collection when I last spoke with him. > > He does not actually read "blocks". He reads the tape in an *analog* fashion, and then processes the results with software. That is how he recovered the IBM 1410 system tapes and diagnostics, for example. > > To be honest, I doubt that this content would be such that he would be likely to volunteer. Some years ago, inspired by Paul Pierce's earlier program in Java, I wrote similar software in C to decode the analog waveforms from tapes in a variety of formats: 7-track NRZI, 9-track NRZI, PE, and 6250 BPI GCR, and 6-track NRZI for Whirlwind. https://github.com/LenShustek/readtape As a one-time physics major, I *am* interested in the Schoonschip content. I've offered to James Liu to give it a go if he can't get someone like Chuck to read it in a more straightforward fashion.

4 years, 8 months

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