test-drb

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101090 discussions

by hachti＠hachti.de

Hi, I seem to remember that it was possible to save a FORTRAN IV program together with the FRTS runtime system as a runnable .SV core image file. It seems that ADVENT does so... Any idea? (minor question: How does something like "R PROG ARGS" work?) Regards, Philipp -- http://www.hachti.de

15 years, 7 months

Burroughs core memory module <-> machine

by dm561＠torfree.net

----------------------Original Message: Date: Fri, 27 Aug 2010 00:30:24 -0700 From: Paxton Hoag <innfoclassics at gmail.com> Subject: Re: Burroughs core memory module <-> machine To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <AANLkTik=GrMyH34cMQahxmPcSYoraFQ5+7bS=e2a=7dD at mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 > I have a core memory module from some Burroughs machine. It is a large > plug-in PCB about 16 inches square containing address & inhibit drivers & > such. Mounted to this is a near-same-size daughter-board containing the > sense amplifiers and the folded planar array of cores underneath a metal > shield. > > It is organised as 32 KWords, 20 bits wide. > > Any suggestions as to what machine this may have come from? > Burroughs made several successful solid state accounting machines before branching to full computers. Some of these had core memory and were made in the 1970s. ... Paxton ------------------------Reply: Indeed, specifically a few models in the E series, but those memories were *much* smaller; I think I still have one somewhere. In the transition from mechanical base10 systems to solid state binary systems some early E models used an interesting device called a "core counter" which was effectively a non-volatile IC-sized solid state magnetic divide-by-ten counter that emitted a pulse for every ten pulses in, a logically direct replacement for the mechanical cams and 10-position gears that most adding and accounting machines had been built around up till then. 32K x 20 sounds like it'd be out of a Medium or Large system (B2xxx or greater).

15 years, 7 months

Burroughs parts? (was Re: PROMS but from what ?)

by ethan.dicks＠gmail.com

On 8/25/10, MikeS <dm561 at torfree.net> wrote: > Are you sure that they're PROMs? > > They might be Burroughs numbers, but not PROMs (at least not the ones I > looked up). > > For instance: > > 1447 3581 7438 4x2 NAND gate > 1447 3540 7410 3x3 NAND gate > 1447 3797 9322 4x2to1 MUX > 2600 1495 7404 6xINV Hey! I think I've got a tackle box full of stuff like this. One drawer is marked "3581 '38" for example. I picked up the tacklebox and the chips from a vendor at Dayton some years ago. It's loaded with the following part numbers (dates listed are representative): 1447-3532 SN7404N 7909 (Nat'l Semi/Signetics/TI) 1447-3524 SN7408N 7650 (Nat'l Semi/Signetics/ITT/TI) 1447-3540 7410F 7915 (Nat'l Semi/Signetics/ITT) 1447-3565 7420 7907 (Signetics/ITT/TI) 1447-3607 SN7474N 7836 (TI/Fairchild/Signetics) 1447-3615 74107N 7912 (Nat'l Semi/Fairchild/Signetics) 1447-3557 74H11N 7738 (Nat'l Semi/ITT/Signetics) 1447-3581 7438N 7838 (Nat'l Semi/ITT/Signetics) 1447-3797 SN74157 7827 (Nat'l Semi/ITT/TI) 1447-3771 SN74161N 7701 (Nat'l Semi/TI/AMD) 1447-3755 74195 7644 (Signetics/TI/AMD) 1447-3722 74155 7709 (Signetics/TI) 1447-3714 SN74153 7832 (Nat'l Semi/Signetics/TI) ... plus a mish-mash in a bin marked "misc"... part numbers include 1447-* * == 3599, 3706, 3623, 3698, 3789, 3649 and several more Until this thread, I had no idea the 1447-* numbers were Burroughs. Is anyone restoring such equipment and looking for spares? My own interest are such that if I used these anywhere, it'd be to replace parts gone bad in DEC M-series modules for my PDP-8/i and PDP-8/Ls. In particular, I'm always hunting for 7474s since those seem to be favored to fail in the gear I have (along with 7440s, statistically). Is there a list of these part numbers? The ones I gave happen to be listed with both the 1447-* numbers _and_ 74-series TTL numbers. The misc drawer has numerous ones with only 1447-* numbers, and I'd like to know what's what. Cheers, -ethan

15 years, 7 months

Emulating a smart CRT display unit - ideas?

by Arno_1983＠gmx.de

"Chuck Guzis" <cclist at sydex.com> wrote: > For a really nice VGA display, check out the PICASO from SparkFun. > Coupled with a low-end microcontroller, that should give you pretty > much everything that you need, save for the differential receivers. ...and quite a lot I don't need, like colo(u)r and graphical "primitives" which aren't (drawing rectangles and circles,...), at a somewhat steep price. > Google "VGA microcontroller" for other ideas. I'll go looking for "BAS" (VBS) "Microcontroller", too, since that's probably the way I'm wanting to go in the long run (using a cheap portable TV as display), if the controller turns out to be intact after all. Thanks, Arno Kletzander -- GRATIS f?r alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

15 years, 7 months

GET LAMP is here

by ragooman＠gmail.com

GET LAMP is here =Dan -- --http://www.vintagecomputer.net/ragooman/

15 years, 7 months

In search of: DEC LP20 interface boards

by RichA＠vulcan.com

Folks, Does anyone on the list have any of the following DEC PDP-11 printer interface boards squirreled away? M8585 LP20 Translation RAM Module M8586 LP20 Line Printer Control Module M8587 LP20 Line Printer Data Paths Module or M8571 LP20 Line Printer Data Paths Module Please contact me if you have one or more of these. Thanks, Rich Rich Alderson Vintage Computing Sr. Server Engineer Vulcan, Inc. 505 5th Avenue S, Suite 900 Seattle, WA 98104 mailto:RichA at vulcan.com mailto:RichA at LivingComputerMuseum.org http://www.PDPplanet.org/ http://www.LivingComputerMuseum.org/

15 years, 7 months

PROMS but from what ?

by dm561＠torfree.net

--------------Original Message Date: Wed, 25 Aug 2010 21:06:37 +0200 From: "Rik Bos" <hp-fix at xs4all.nl> Subject: PROMS but from what ? I aquired a lot of small DIL14/16 PROMS ceramic package with a 8 digit number on it some of the numbers are : 2584 0821 2574 6975 2571 5418 2600 1529 1447 3581 1447 3540 2600 1495 1447 3797 2600 1487 2603 2623 2625 5562 2554 0888 2600 1495 I can't find any reference about them, so if some one recognizes the numbers or can use them let me know (I've a few hundreds of them) If no one wants them I'm going to archive them in the big metal bin. -Rik -------------------Reply: Are you sure that they're PROMs? They might be Burroughs numbers, but not PROMs (at least not the ones I looked up). For instance: 1447 3581 7438 4x2 NAND gate 1447 3540 7410 3x3 NAND gate 1447 3797 9322 4x2to1 MUX 2600 1495 7404 6xINV mike

15 years, 7 months

Burroughs parts? (was Re: PROMS but from what ?)

by dm561＠torfree.net

---------------------Original Message: Date: Thu, 26 Aug 2010 01:09:00 -0400 From: Ethan Dicks <ethan.dicks at gmail.com> Subject: Burroughs parts? (was Re: PROMS but from what ?) On 8/25/10, MikeS <dm561 at torfree.net> wrote: > Are you sure that they're PROMs? > > They might be Burroughs numbers, but not PROMs (at least not the ones I > looked up). > > For instance: > > 1447 3581 7438 4x2 NAND gate > 1447 3540 7410 3x3 NAND gate > 1447 3797 9322 4x2to1 MUX > 2600 1495 7404 6xINV Hey! I think I've got a tackle box full of stuff like this. One drawer is marked "3581 '38" for example. I picked up the tacklebox and the chips from a vendor at Dayton some years ago. It's loaded with the following part numbers (dates listed are representative): 1447-3532 SN7404N 7909 (Nat'l Semi/Signetics/TI) 1447-3524 SN7408N 7650 (Nat'l Semi/Signetics/ITT/TI) 1447-3540 7410F 7915 (Nat'l Semi/Signetics/ITT) 1447-3565 7420 7907 (Signetics/ITT/TI) 1447-3607 SN7474N 7836 (TI/Fairchild/Signetics) 1447-3615 74107N 7912 (Nat'l Semi/Fairchild/Signetics) 1447-3557 74H11N 7738 (Nat'l Semi/ITT/Signetics) 1447-3581 7438N 7838 (Nat'l Semi/ITT/Signetics) 1447-3797 SN74157 7827 (Nat'l Semi/ITT/TI) 1447-3771 SN74161N 7701 (Nat'l Semi/TI/AMD) 1447-3755 74195 7644 (Signetics/TI/AMD) 1447-3722 74155 7709 (Signetics/TI) 1447-3714 SN74153 7832 (Nat'l Semi/Signetics/TI) ... plus a mish-mash in a bin marked "misc"... part numbers include 1447-* * == 3599, 3706, 3623, 3698, 3789, 3649 and several more Until this thread, I had no idea the 1447-* numbers were Burroughs. Is anyone restoring such equipment and looking for spares? My own interest are such that if I used these anywhere, it'd be to replace parts gone bad in DEC M-series modules for my PDP-8/i and PDP-8/Ls. In particular, I'm always hunting for 7474s since those seem to be favored to fail in the gear I have (along with 7440s, statistically). Is there a list of these part numbers? The ones I gave happen to be listed with both the 1447-* numbers _and_ 74-series TTL numbers. The misc drawer has numerous ones with only 1447-* numbers, and I'd like to know what's what. Cheers, -ethan ---------------------------Reply: Have a look at the cross-reference on Bitsavers: http://www.bitsavers.org/pdf/burroughs/icData/ and if there are any that you can't find, send me a PM and I'll see what I can find; I have another list or two but no idea where they came from, as well as some dead-tree stuff from my days at BBM. mike

15 years, 7 months

Should you correct production mistakes?

by shoppa＠trailing-edge.com

Eric writes: > Tony Duell wrote: >> I could trivially desolder the IC, straighten the pin, and solder it back >> properly. But should I? What would others do? > Had we found any problem analogous to that in the PDP-1 restoration, > where the machine operated correctly despite a manufacturing defect, I'm > sure we would have had a debate on whether to fix it. I think my own > opinion in that case would be that we should leave it alone, but tag the > module (paper tag attached with a short loop of string) and document the > issue in the system logbook. > For something that isn't considered a museum artifact, I'd be more > inclined to fix it. Whatever happened to "if it ain't broke, don't fix it"? The ability of a robust assembly and QA process to result in working systems, despite small manufacturing errors, is remarkable. If the board passed QC and was released into the wild and is still working decades later, that is a fact worth noting but I see zero reason to correct it. I don't doubt anyone's soldering skill but there is still a small and nonzero chance that any attempted "fix" would result in hassles. When I was in college decades ago, I got to help a civil engineer who had tried to build a Heathkit maybe 10 years before that but never got it working. I looked inside, found a few diodes he had reversed, and said that was the reason. He looked at me incredulously: "You mean a couple of incorrectly assembled parts will stop the whole receiver from working?". Yep. "If we designed bridges that way, there wouldn't be a single bridge standing in the world!" Tim.

15 years, 7 months

PROMS but from what ?

by dm561＠torfree.net

----------------------Original Message: Date: Thu, 26 Aug 2010 11:38:45 +0200 From: "Rik Bos" <hp-fix at xs4all.nl> Subject: RE: PROMS but from what ? <snip> > I aquired a lot of small DIL14/16 PROMS ceramic package with > a 8 digit number on it some of the numbers are : > 2584 0821 ... > -Rik > > -------------------Reply: > > Are you sure that they're PROMs? > > They might be Burroughs numbers, but not PROMs (at least not > the ones I looked up). > > For instance: > > 1447 3581 7438 4x2 NAND gate > 1447 3540 7410 3x3 NAND gate > 1447 3797 9322 4x2to1 MUX > 2600 1495 7404 6xINV > > mike > > > Mike, Thanks, to be honest no I'm not sure. I was told it were proms and some of the ic's did have labels on them. When I removed on it was a 74S571J which is a 2K prom. Do you have a xref list for Burroughs parts or know where I can find one If any one needs one or more of those let me know. -Rik -------------------------Reply: As Al mentioned, there is a partial list at bitsavers: http://www.bitsavers.org/pdf/burroughs/icData/ There may also be more in some of the other manuals, and I have info on some more as well as a "parts catalogue" that I can't put my fingers on at the moment. If you do have some PROMs, I'd think that there's a good chance that they're already programmed and therefore not very useful (but worth checking JIC). mike

15 years, 7 months

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