test-drb June 2021

test-drb@ccmp.vtda.org

100 participants
47 discussions

by dave.g4ugm＠gmail.com

Its been a while but Attachate software generally only needed special hardware for stuff like 5250 twinax, 3270 co-ax, and various SDLC connections. This page might help check which versions support regis but they perhaps don't go back to the really old versions... https://support.microfocus.com/kb/doc.php?id=7021488 Dave G4UGM > -----Original Message----- > From: cctech <cctech-bounces at classiccmp.org> On Behalf Of Wayne S via > cctech > Sent: 19 June 2021 00:50 > To: Douglas Taylor <dj.taylor4 at comcast.net>; General Discussion: On-Topic > Posts <cctech at classiccmp.org> > Subject: Re: VT340 Emulation > > We tried to use Reflection 240 on IBM PS/2 machines circa 1990. IIRC, it > installed easily w/o needing special drivers. > For the most part it worked as advertised. We didn't really need Regis > graphics so we never tested that out. It's problem was that it was really slow > on PCs, much slower than a real VT240 terminal. We were trying to use Dec's > "all in one" office automation to do word processing and spreadsheets. It's > slowness caused us to abandon it and just use word perfect and lotus 123 > instead. FYI, There are reflection manuals on the wayback machine for > reference. > > > Wayne > > > > On Jun 18, 2021, at 12:51 PM, Douglas Taylor via cctech > <cctech at classiccmp.org> wrote: > > > > Right, according to the few notes I've seen on the packages currently for > sale on ebay. > > > > I hesitate to buy because I picked up a similar piece of software, Smarterm > 240, which seemed to do the desired emulation. It was old software for DOS, > but I have an old DOS machine I use for PUTR I thought I could install it on and > be up and running. It didn't turn out that way because Smarterm wanted a > particular video card and driver (which I didn't have, of course). I didn't find > that out until I got the package open and tried installing it. > > > > I don't know if the Reflection software has any restrictions like that. The > versions I see for sale are for Win3.1 and such, not exactly the heyday of plug > and play. I was hoping to get some guidance from someone who has used > the Reflection software on what the actual hardware/software requirements > are. > > > > On a side note, emulating a Tektronix 4010 is apparently free and high > quality (see github). It is the DEC graphics terminals that no one has > produced an open source emulation software for, so that's why I am asking > this question. > > Doug > > > >> On 6/18/2021 1:16 PM, Bill Degnan wrote: > >> Reflection 4 should do that, right? > >> Bill > >> > >> On Fri, Jun 18, 2021 at 1:15 PM Douglas Taylor via cctech > <cctech at classiccmp.org <mailto:cctech at classiccmp.org>> wrote: > >> > >> Does anyone have experience with the Reflection software that will > >> emulate a DEC VT340 color graphics terminal? > >

4 years, 1 month

Vintage Computer Museum eBay Sales

by organlists1＠sonic.net

It seems at least on the first page of their listings, $899.99 is a favorite asking price? https://www.ebay.com/str/vintagecomputermuseumservices?_trksid=p2047675.l256 3 Don Resor

4 years, 1 month

IBM Logic IC equivalency information needed

by santo.nucifora＠gmail.com

I am currently working on an IBM 5100 that has some issues. I know for certain that the 5100 has a bad graphics controller card so I need to dig into component level replacements for those ICs I can replace. I have a list of logic chip equivalents to the IBM part numbers that are written on the chips but I don't think it's 100% accurate because IBM part number 1582601 comes back as 74151 "DATA SEL/MUX" but when I use one of those cheap logic chip testers (that is surprisingly accurate), it comes back as a 74157. For the record, if I test a 74151, it comes back as a 74151 so the tester is correct. I just want to make sure the table I have is accurate and that the tester is not 100% accurate or if that chip has failed and tests like a 74157 in it's state. This is the current list I am using that I got from somewhere but I don't recall where: https://vintagecomputer.ca/ibm-vintage-logic-chip-equivalency-list/ Does anyone have an IBM logic chip equivalency table for 74 series logic chips? Any help is much appreciated. Santo

4 years, 1 month

PDP-11/05 (was: PDP-11/05 microcode dump?)

by jnc＠mercury.lcs.mit.edu

> From: Tom Uban > it has the early version M7261E Control Logic & Microprogram board and > the later version M7260 Data Paths board Ah, I'm glad someone found all that stuff I wrote up there useful. As always, I _think_ I got it all transcribed correctly, but do be on the lookout for errors! > it seems like an older/newer combination, but maybe that was common. I > would not have guessed that the four possible combinations would all > work together, but maybe they do? I honestly don't know. As far as I can tell, the DEC documentation doesn't even _mention_ the two different board generations; perhaps a sign that they are functionally interchangeable? (Although even the section on baud rate, in both DEC-11-HKDBB-A-D and EK-KD11B-MM-001, 4.11, doesn't even mention the early board. So maybe the manual just ignores the earlier version completely?) I don't have an /05 up and running at the moment, or I'd check all 4 and see if they all work. > Presently, the machine sometimes runs relatively well and other times > it does not. What are the failure symptoms? (It's almost certainly going to take a 'scope to fix it; I expect you have one?) I'd start by monitoring the CPU clock, and make sure it's running when the failure happens. (Note that the front console is handled by the microcode, so if the microcode isn't running, the machine will be totally dead. EK-KD11B-MM-001 has a good description of how that works.) > my initial messing with KM11 boards, reveals that I can step the > microcode with a KM11 in either the #1 or #2 position, but when two > KM11s are installed at the same time, they do not function properly > together. Is this expected or do I have an issue there too? Not sure. EK-KD11B-MM-001 (available at: http://www.bitsavers.org/pdf/dec/pdp11/1105/EK-KD11B-MM-001_Jan75.pdf and definitely something you need) says, at pg. 5-6 "KM11 switches have the same function in slots KM-1 and KM-2", and on 5-7 "permits the user who has only one KM11 to plug into either KM-1 or KM-2". So that _sounds_ like you should be able to plug two in together. The first indicates that the switches, the only input to the KD11-B from the KM11, are wired in parallel, and the only other thing on the KM11 are the lights, outputs. And why mention "user who has only one KM11", if having two is no use because one can't use two at once? Noel

4 years, 1 month

Sun 3/60 Up for Grabs

by john＠ziaspace.com

> I'm moving and I need to clean out a few things. > > I have a Sun 3/60 with no keyboard/mount/monitor/hard drive - just the > pizza box. It net booted NetBSD, but that was many years ago so YRMV. > > Free for pick-up only in Queen Creek, AZ. Is this still available? This is the kind of hardware I'd like to help preserve. Thanks, John Klos

4 years, 1 month

Sun 3/60 Up for Grabs

by david＠thecoolbears.org

I'm moving and I need to clean out a few things. I have a Sun 3/60 with no keyboard/mount/monitor/hard drive - just the pizza box. It net booted NetBSD, but that was many years ago so YRMV. Free for pick-up only in Queen Creek, AZ.

4 years, 1 month

Large Scale Systems Museum

by mloewen＠cpumagic.scol.pa.us

https://www.mact.io/ Hi folks! We've been away from Facebook for awhile, but we've been staying busy here. Now that things are starting to get back to normal from the disruption of Covid19, we're doing tours again, and we're getting our volunteer work days rolling again, restoring more and more vintage systems for you to enjoy. However, we're in a bit of a pickle, and we need your help. Our main floor air conditioning system has died, and is beyond repair. It's a 40-year-old power hungry system anyway, so it really just needs to be replaced. We have a quote in-hand from a local, reputable A/C contractor for a brand new, ultra-efficient system, and we're trying to raise funds for it, about $8500. We're already about halfway there from recent private donations. If we're unable to get the rest of the way there, we'll have no choice but to close for the summer. As an all-volunteer, donation-funded nonprofit educational organization, we depend on your support to keep doing what we do. Please help us if you can. We accept donations via PayPal to donations at mact.io, or via check/money order made out to Museum of Applied Computer Technology, mailed to the museum at 924 4th Avenue, New Kensington, PA 15068. Any overage will be put toward our utility bills and other operating expenses. LSSM/MACT is a 501(c)(3) nonprofit organization. Thank you, -Dave McGuire President/Curator, LSSM/MACT

4 years, 1 month

Memorex Telex IDE 711186669587 ISA controller

by w9gb＠icloud.com

The recently acquired a Memorex Telex IDE ISA controller (early 1990s), number 711186669587 , that has an unpopulated floppy / tape controller area on the board. The board has 34-pin internal header and DC-37 for external drive. I would like to populate those missing components on the PC board. I could reverse engineer the design, and ?fill in blanks? of the likely floppy/tape controller. The PLCC package (44-pin) is likely a late model chipset (tape/floppy). A schematic, parts list, or manual would shorten the effort for this board. Greg chicago

4 years, 1 month

Disk drives, keypunch offered in SF bay area:

by cclist＠sydex.com

This fellow-s been posting on VCF; thus far, he's offered a pair of Perkin-Elmer disk drives and a USB-modified 029 keypunch. Stuff is pickup-ony by July 8. The drives: https://sfbay.craigslist.org/pen/sop/d/los-altos-perkin-elmer-interdata-vt2… --Chuck

4 years, 1 month

Anyone need a 10 tape Compaq DLT drive with changer cart?

by cz＠alembic.crystel.com

Hi! Dragged out my old Compaq DAT tape drive and although it powers up some of the rubber wheels have turned to goo. Since I don't have any reason to fix it I thought I'd offer it here for shipping. Compaq 3000 series, this is a 199527-003, rebadged HP tape changer. It got a 10 tape capacity changer cartridge, powers up, moves the tape cart, however throws an error 40 because the rubber is gone. One of the wheels is liquid but intact so you can probably measure the OD to install a spare. Anyone want it? Or it goes in the recycling. CZ

4 years, 1 month

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test-drb June 2021