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New DRAM (SIMM) board works but gives a parity error, only on cold powerup

by Anders Gustafsson

Hi! I have been mostly lurking here, but I have been designing a DRAM board for the HP1000 A-Series, using a more modern 72-pin SIMM. The A400 can adress 32Mb of parity ram so I use 17 bits on a 64Mb SIMM. I have taken inspiration from the original HP12103X boards and tried to keep away from esoteric parts. The board prototype works now and passes all tests, except that it gives a partity error in one of the first addresses (ie 2,7,10 octal) when booted cold. If I then run a %T it works fine, and also if I reset by bringing PON low. I have tested with different SIMMs and the two different types I have tested both exhibit the same issue. The 64Mb one has Samsung KM41C16000C chips. As this is for hobby-use, it is not a big deal as the board works, otherwise, but it is annoying. If anyone here, and I expect there are several that have worked with DRAM chips, have any suggestions on this issue or the board in general? Schematic is here:www.dalton.ax/hp1000/Memory/HP1000RAM_SIMM_Buffers_20241130.pdf Yes. I have also written protocol decodes for the KingstWiz LA5032 32-bit LA to analyse the HP memory bus if anyone is interested. -- Med vänlig hälsning Anders Gustafsson, ingenjör

8 months

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DECtalk for Digital UNIX

by Cameron Kaiser

Anyone out there collecting Digital UNIX or Tru64 stuff? I'm trying to find the Alpha version of DECtalk V4.2A that ran on Digital UNIX. The readme file is easy to find but not the actual package. If you know where it is or have a good guess, I'd be much obliged (and so will this AlphaPC 164LX running Tru64 5.1B). -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com -- The surest test of discipline is its absence. -- Clara Barton --------------

8 months

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Not Try Algol 68 on Windows

by Lyndon Nerenberg (VE7TFX/VE6BBM)

Could we maybe change the subject headers here? Neither Fortran nor IBM terminal controllers has anything to do with Algol :-)

8 months

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Re: Try Algol 68 on Windows

by Paul McJones

This sounds like FLACC (Full Language Algol68 Checkout Compiler) by Chris Thomson and Colin Broughton: "You know, we only ever got 22 copies installed, and less than 5 of those in North America. Even though it ran on 370's under MVS, CMS and MTS, and was cheap and reliable. Talk about a marketing disaster. " [Chris Thomson, comp.lang.misc, November 27, 1988] https://www.softwarepreservation.org/projects/ALGOL/algol68impl/#FLACC > Date: Mon, 13 Jan 2025 07:02:08 -0800 > From: "Lyndon Nerenberg (VE7TFX/VE6BBM)" <lyndon(a)orthanc.ca <mailto:lyndon@orthanc.ca>> > Subject: [cctalk] Re: Try Algol 68 on Windows > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org>> > Message-ID: <58bac767a09d3a37(a)orthanc.ca <mailto:58bac767a09d3a37@orthanc.ca>> > Content-Type: text/plain; charset="us-ascii" > > Mike Parr via cctalk writes: >> Hello all. >> Here is a link to something I wrote - brief intro to Algol 68's background, a >> nd how to run it on Windows - with a toy IDE as well. > > This triggers a fuzzy memory of an Algol 68 compiler running on > MTS at the U of Alberta, circa 1980. ISTR Chris Thompson at UofA > Computing Services had a hand in its development. > > Was this just a UofA thing? Did it escape to other MTS installations? > Did anyone use it to write substantial programs on MTS? Or was it > intended for Comp. Sci. teaching purposes? > > --lyndon

8 months

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Re: Try Algol 68 on Windows

by donald donaldwhittemore.com

Yes, but punch cards did not have to worry about magnets. 😊

8 months

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Re: FOCAL history

by Paul McJones

Note in his "FOCAL Notes and Background <http://www.softwarepreservation.net/projects/FOCAL/index#Merrill2024>”, Rick Merrill said: "Back in Maynard I took an editor, a floating point package and the specs for the JOHNNIAC Open Shop System (JOSS) and ideas from the Massachusetts General Hospital Utility Multi-Programming System (MUMPS) and wrote an interpreter that would do the user's job on the spot and interactively" > Date: Mon, 13 Jan 2025 10:33:46 +0100 > From: Hans-Ulrich Hölscher <vaxorcist(a)googlemail.com <mailto:vaxorcist@googlemail.com>> > Subject: [cctalk] Re: FOCAL history > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org>> > Cc: Mike Parr <mikeparr(a)live.com <mailto:mikeparr@live.com>> > Message-ID: > <CABG6mpaVHJWhECDiuxHZQcj+GwohHqqh9=HWJR0f2ooT+0PnPQ(a)mail.gmail.com <mailto:CABG6mpaVHJWhECDiuxHZQcj+GwohHqqh9=HWJR0f2ooT+0PnPQ@mail.gmail.com>> > Content-Type: text/plain; charset="UTF-8" > > Sorry, no: > BASIC 1963 > FOCAL 1968 > > Hans-Ulrich Hölscher <vaxorcist(a)googlemail.com <mailto:vaxorcist@googlemail.com>> schrieb am Mo., 13. Jan. > 2025, 10:31: > >> Isn't FOCAL older than BASIC? >> >> Mike Parr via cctalk <cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org>> schrieb am Mo., 13. Jan. >> 2025, 10:03: >> >>> I wondered about any influences from BASIC?

8 months

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Re: Try Algol 68 on Windows (fwd)

by Lyndon Nerenberg (VE7TFX/VE6BBM)

[Oops. Forgot to cc the list the first time.]

8 months

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Spare Time Gizmos SBC6128 PDP8 board

by Doug Jackson

Hi everybody, I used to own a SBC6128 which I built from Spare Time Gizmo's. It was a PDP8 on a chip, using a Harris 6128 PDP8 on a chip. It featured a serial port and an IDE disk interface. It was a heap of fun to use and recreated quite faithfully, my PDP8 that I had access to as a kid circa 1985... Sadly, I had to move a few years ago, and search as I can, I can't find it. I also can't find my HP41 HPIL cassette drive, printer and accessories but that's another story. Does anybody have a bare PCB or a built one that they don't use any more? I know I'm in Australia, but I don't mind paying postage. Happy to pay whatever you need.. Kindest regards, Doug Jackson

8 months

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FOCAL history

by Bruce Ray

'FOCAL's history is now highlighted on the Software Preservation Group web site. Originally created for the PDP-8 in 1968, this simple, approachable computer language significantly expanded the use of early DEC minicomputers into applications not previously possible. It was embraced by users in an extremely wide range of applications, like education, psychology, aviation, medicine, to nuclear physics and process control. Read about the personal motivations and decisions that shaped this language and its wide-ranging impact at: https://www.SoftwarePreservation.org/projects/FOCAL -- Bruce Ray Wild Hare Computer Systems, Inc. Denver, Colorado USA bkr(a)WildHareComputers.com ...preserving the Data General legacy: www.NovasAreForever.org

8 months

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Looking for S100 SCSI stuff

by Richard Cini

All — I haven’t posted to this list in the recent past, mostly posting to VCF or the S100 group. But, I’m trying to cast my net wide looking for some specific things for a project I’m working on. I’ve done recreations/clones of two Lomas S100 boards – the Color Magic and the Thunder 186 (https://github.com/RichCini/LomasBoards). This set creates a two-board computer that can run unmodified PC-DOS. While it’s PC-compatible, it’s compatible in the Tandy 2000 kind of way. I started work on the Color Magic about 2 years ago, pending reversing the PALs, which happened this year. The Thunder 186 was much easier to recreate, and thus was done in a few months. What this system currently lacks is a mass storage option. Lomas offered a SCSI board (which added an RTC and 4 serial ports), but copies of the manual and schematics aren’t known to exist on the Internet. There’s also a great alternative, the Lifeboat SCSI (for the Z-100 machines), but I haven’t been able to locate the software drivers or firmware for it (I have a manual which has the schematic and PAL equations). Finally, I can almost get Windows 1.0 running on this setup, but it needs custom drivers. I have the drivers from the Tandy 2000 (aka, the "Tandy 2000 MS-Windows Pre-Installation Disk") which don’t work as-is but I believe could with modifications. I posted to the Tandy Discord server but if anyone should know of the existence of these sources, please let me know. Thanks! Rich -- Rich Cini http://cini.classiccmp.org

8 months, 1 week

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