test-drb

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101090 discussions

by jwest＠classiccmp.org

Several people asked, here's the scoop: The common proms for HP 21MX M/E/F are 1K, 4K, and 8K. 1K are used for either loader roms on the cpu board or microcode on the FAB 4K are used for microcode on the FAB or FEM 8K are used for microcode on the FEM The manuals you'll want to print and keep handy: HP 12992 Loader Roms Installation Manual, 12992-90001 (April '86) HP 1000 M/E/F-series Firmware Installation and Reference Manual, 12791-90001 (September, '83) I believe these are both on bitsavers. They are "must have" manuals. These are all bipolar proms, and most modern prom programmers will not be able to program them. I use a Data I/O 29B (with Unipak 2B), and it can program all these parts. Those programmers appear on ebay from time to time at around roughly $400. The blank proms are not terribly easy to find these days. Ebay has them occasionally, but your best bet is sites that cater to arcade machine repair. Here's a non-exhaustive but useful list of compatible parts for each: 1K parts MMI 6301 Harris 7611 Signetics N82S129 National 74S287 TI 24S10 AMD 27S21 Fujitsu 7114 (possibly 7052 as well, need to verify that) 4K parts Signetics N82S141 Harris 7641 MMI 6341 8K parts Signetics N82S181 Harris 7681 MMI 6381

10 years, 9 months

Control Data 160 Ebay

by billdegnan＠gmail.com

Anyone here get the Control Data 160 (Ebay 252070822992)? I must admit time, money, and space aside I would love to have had this one! (I have the manuals at least) -- Bill vintagecomputer.net

10 years, 9 months

'New' PDP-11 prints

by jnc＠mercury.lcs.mit.edu

> There are a number of things like that (e.g. the H786 power supply for > the BA11-N; [print sets] not available separately [online], but in the > 11/23 FMPS [online], if you know to look there): we ought to produce > some sort of registry, to collect such information in one place. So I have started such a registry. http://ana-3.lcs.mit.edu/~jnc/tech/FMPSOnline.html The concept is that eventually search engines will index that page, so people looking for, say, '"BA11-N" prints' will wind up there, and that page will tell them where to go. I went through a number of PDP-11 print sets which are online (11/05S, 11/23, 11/34, etc) to compile the initial list, but it's just a start. I will add others as I come across them; and if any knows of, or finds, any others (i.e. print sets which _are_ online, but do not show up when looked for in common search engines such as Google), please let me know, and I will add them. > I also found prints for the MF11-U, MF11-W, and MM11-Y; none of which > appear to be on-line (although the MF11-U ones might be in the 11/05S print > set, which ISTR is online). On looking at the 11/05S print set online, I think it has most of the MM11-Y prints, but some pages are apparently missing (it claims), so I think not everything is there. > I don't think the ME11-L prints are online either, but those I have in > my 11/05 print set - I'll have to see if that print set is online > somewhere, no point re-scanning them, if so. So it turns out that these don't seem to be online (in any form), but I have a set of hardcopy in my set "PDP-11/05 Engineering Drawings" (which is different from the 05S set which _is_ online), so I will scan them in and make them available at some point (especially since these seem to be the most common PDP-11 core memory boards). If anyone is desperately searching for them, please let me know, and I will accelerate that process. The situation with the ME11-L/MF11-L/MM11-L (which are all the same boards) is slightly complicated. The board set is called an MM11-L (or -LP, depending); G110+G231+H214 for non-parity, G109+G231+H215+M7529 for parity. The MF11-L seems to be a backplane, plus an MM11-L board set; the ME11-L seems to be an MF11-L in a box. Some CPU backplanes (e.g. the older 11/05's) can also take an MM11-L board set. (The _newer_ 11/05's have backplanes which take an MM11-Y - whether an MM11-L would work in them, I have no idea.) Noel

10 years, 9 months

'New' PDP-11 prints

by jnc＠mercury.lcs.mit.edu

> On looking at the 11/05S print set online, I think it has most of the > MM11-Y prints Err, make that the 11/04 print set. (Sorry!) The 11/05S has the MF11-U (or would that be MM11-U - I wonder if there's a system to the ME/MF/MM designators). Noel

10 years, 9 months

Reading ROMs

by gerardcjat＠free.fr

List of blank for 21MX and microcode : That would be very usefull. Thanks in advance --- L'absence de virus dans ce courrier ?lectronique a ?t? v?rifi?e par le logiciel antivirus Avast. https://www.avast.com/antivirus

10 years, 9 months

What kind of keyboard is this?

by wheagy＠gmail.com

I picked this up at Radio Shack about 25-30 years ago and have been hauling it around ever since. http://imgur.com/oNEcRFv,VacFqrY#0 (There should be two images...a link to the second.) It was a surplus thing that RS was selling on the parts wall and I grabbed on the off chance I'd need it someday. I lost the cardboard top to the plastic bag it came in, so I know nothing about it. Anyone have any idea? Thanks...Win

10 years, 9 months

Problem with RF73 DSSI disk

by holm＠freibergnet.de

Since the capacity of 2x RF31 and 1x RF71 disks is a little bit low for VMS with some compilersi (~400MB every disk), I've looked for a bigger disk, at least for the sytem itself. (I've already relocated the pagefile to the 2nd disk). Ok, there are RF73 available at ebay US for $100, but addiotional $50 and more for shipping is to much, I have to pay additional 19% of customs VAT on top of the sum from disk+shipping.. Maybe there are people that think that this prices are ok, but not me, not for an old 2GB disk for an computer with that power consumtion and that computing "power".. In the case there is someone in europe that want to give away such a disk for an acceptable price, please mail me.. Luckily an old friend of mine found 2 Disks in his stock, another RF31 (not tried jet) and an RF73. I've changed now the working but still almost empty RF71 in my VAX4000-300 against that RF73 disk and tried to integrate it to the system. It starts with all LEDs on (as the other do), begins to rattle a little with the head assembly (as the others do) but stops then and begins to reposition somewhere in 0.5s cycles. It never finishes doing that, it is not going to ready. The ready led is blinking for a short time after every 0,5s cycle. I've tried to talk with the disk using the KA670 Firmware with set host/dup/dssi/bus:0 2, PARAMS is working and STATUS is responding, the displayed last failure was 3304(X) and I don't know what that could be.. All other commands do work, but they are aborted since the disk is busy. The available RF72DUG8 gives the hint that the error codes are listed in the service manuals, but it seems that those manuals aren't available somewhere. What could the error be? Is the disk dead? Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

10 years, 9 months

Fw: MITS Altair 8800b switches needed

by mhs.stein＠gmail.com

Oops: http://www.dailywell.com.tw/uploadpic/file/20130914143655f.pdf ----- Original Message ----- From: "Mike Stein" <mhs.stein at gmail.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Sent: Monday, September 07, 2015 12:41 AM Subject: Re: MITS Altair 8800b switches needed > Anything here you like? > > Might have to hunt for a distributor/retailer > though. > > m > > ----- Original Message ----- > From: "drlegendre ." <drlegendre at gmail.com> > To: "General Discussion: On-Topic and Off-Topic > Posts" <cctalk at classiccmp.org> > Sent: Sunday, September 06, 2015 4:21 PM > Subject: Re: MITS Altair 8800b switches needed > > >> Since Erik brought it up.. >> >> I could also use a couple switches, but in my >> case they are for an 8800A >> model. (Well, it's sort-of a 'B' now as it was >> upgraded to the 'B' power >> supply, but it still has the original 'A' type >> D/C board). >> >> Like the 'B' it uses mostly Mom-Off-Mom >> mini-toggles, with panel mount >> bushing, and the long solder terminals that >> solder directly to the PCB (not >> the small eyelet type). But the handles are the >> standard mini-toggle bat >> handle - not the flatted paddles Erik >> describes. >> >> Any leads, feel free to mail me off-list. >> Thanks! >> >> -Bill >> >> On Sun, Sep 6, 2015 at 1:13 PM, Erik Klein >> <classiccmp at vintage-computer.com> >> wrote: >> >>> I am desperately seeking NOS, working pulls or >>> accurate replacement >>> switches for my MITS 8800b. >>> >>> These are flattened paddle switches, both >>> ON-OFF and MOM-Off-MOM type. >>> SPDT, Panel mount, solder post with a 15mm >>> actuator. This last part is the >>> pain as everything I've found is 10mm or less. >>> >>> I've checked every online source that I know >>> of plus all of the local >>> electronics and surplus shops with no luck. >>> >>> I'm sure someone here has a stash or knows >>> someone who does. I need at >>> least one of each type but would prefer a few >>> more as I do have a few >>> marginal switches to replace if I can. >>> >>> I'd even buy a complete 8800b D/C board if >>> that's what it took. >>> >>> Please email me at my webmaster@ >>> "vintage-computer.c0m" address if you can >>> help. >>> >>> Thank you! >>> >>> >>> -- >>> Erik Klein >>> www.vintage-computer.com >>> www.vintage-computer.com/vcforum - The Vintage >>> Computer Forums >>> marketplace.vintage-computer.com - The Vintage >>> Computer and Gaming >>> Marketplace >>> >

10 years, 9 months

MITS Altair 8800b switches needed

by classiccmp＠vintage-computer.com

I am desperately seeking NOS, working pulls or accurate replacement switches for my MITS 8800b. These are flattened paddle switches, both ON-OFF and MOM-Off-MOM type. SPDT, Panel mount, solder post with a 15mm actuator. This last part is the pain as everything I've found is 10mm or less. I've checked every online source that I know of plus all of the local electronics and surplus shops with no luck. I'm sure someone here has a stash or knows someone who does. I need at least one of each type but would prefer a few more as I do have a few marginal switches to replace if I can. I'd even buy a complete 8800b D/C board if that's what it took. Please email me at my webmaster@ "vintage-computer.c0m" address if you can help. Thank you! -- Erik Klein www.vintage-computer.com www.vintage-computer.com/vcforum - The Vintage Computer Forums marketplace.vintage-computer.com - The Vintage Computer and Gaming Marketplace

10 years, 9 months

seeking Burroughs B6700 manuals and software

by nw＠retroComputingTasmania.com

We would be glad to hear from anyone who might have new material related to the Burroughs B6700. We're on the hunt for any manuals or software related to the Burroughs large systems so we can build an emulator for the B6700. This search includes the B5000, B6000, B7000 families, since there is considerable overlap across these families and collateral from one system family can assist understanding another. Example models include B5500, B5700, B6500, B7500, B6700, B7700, B6800, and B7800. We were amazingly lucky with the B5500 to have so much of the critical documentation (thanks Bitsavers!) and a complete suite of system software, but even though the B6700 was more recent and produced in larger numbers we're not having the same level of good fortune finding artifacts. What we have so far is documented here: https://docs.google.com/spreadsheets/d/1JnMsyE8ssJi_-MUsK0rT9LPtNpeJCpTv1Qr… If you're interested in this system then you likely remember that it had a particularly impressive front-panel display, seen here: http://www.retrocomputingtasmania.com/home/projects/burroughs-b6700-mainfra… This was known as the MDL display: Maintenance Diagnostics Logic display. Because the MDL had the 4 x top-of-stack registers down to the bit-level particular bit-patterns allowed words to be displayed. The early MCPs put IDLE into the display during IO waits, and subsequent releases: B for Burroughs, but sites quickly started putting their own company initials or the time. The Danish museum is so far the only place I've found that kept the MDL: http://datamuseum.dk/wiki/Genstand:11000045_Konsolpanel_Burroughs_B6700 Thanks to Finn Verner Nielsen for being so helpful and undertaking an expedition into their warehouse to locate and photograph the item for us. On that DDHF web-page you will see on the left of the picture the B7800 MDL they have too. My goal is to also construct a replica of the B6700 MDL. Steps undertaken so far: Posts to newsgroups Posts on LinkedIn, wikipedia, Yahoo groups Emails to a few dozen people who were involved with the system Trawling the Internet

10 years, 9 months

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