January 2025 - cctalk - classiccmp.org

by John Robertson

Hi Folks! Anyone have one or more of the old TI CPUs? The usual suspects don't stock it (Unicorn, Abra, Jameco...). I have a customers game board in where the CPU was backwards and previously destroyed... In case anyone is curious the game was from Japan - Universal's COSMIC GUERILLA. This is NOT the TMS9918A - video chip - that some folks are trying to emulate with Raspberry Pi(e)s. Thanks! John :-#)# -- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"

1 year, 1 month

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Re: Ram and vram

by Teo Zenios

How much for the quadra VRAM and how many are there? -----------------------------------------From: "Juan del Pino via cctalk" To: cctalk(a)classiccmp.org Cc: "Juan del Pino" Sent: Tuesday January 21 2025 11:24:00AM Subject: [cctalk] Ram and vram Hello, people: anyone interested? hitachi hb56a19a. 150 TC514400ASJ-70 256KB VRAM Apple Macintosh Quadra 700 900 950 68-Pin SIMM RAM 70ns MT42C8128DJ-7 50 IBM Memory Ram 4MB 1M x 32 B1D1320BA-7 DRAM SIMM 72 PINES 60NS 16MB TI TMS417409ADJ-2E. x2 Thanks

1 year, 1 month

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Ram and vram

by Juan del Pino

Hello, people: anyone interested? hitachi hb56a19a. 150 TC514400ASJ-70 256KB VRAM Apple Macintosh Quadra 700 900 950 68-Pin SIMM RAM 70ns MT42C8128DJ-7 50 IBM Memory Ram 4MB 1M x 32 B1D1320BA-7 DRAM SIMM 72 PINES 60NS 16MB TI TMS417409ADJ-2E. x2 Thanks

1 year, 1 month

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Looking for bootable floppy image for a PDP11/20

by Martin Eberhard

I'm in the process of restoring a PDP11/20. Here is what is working so far: KA11 PDP11/20 CPU , power supply, programmer's console, etc. 32Kx16 SRAM/ROM board of my own design (Core memory will come later!) KE11-A Extended Arithmetic Element RX211 controller with RX02 drive, cleaned, spindle bearings replaced, aligned, tested, and working DL11-W Serial Line Unit with Real-Time Clock DL11 2nd serial port, modified to operate at 19,200 baud VT100, connected to the DL11-W I've written a program that lets me load a raw disk image (via Xmodem protocol) from the serial port onto a floppy disk, and verify the write. This works great, for both single-density and double-density. (It can set the media density as needed too.) I'm now looking for a bootable RT-11 floppy disk image (just a raw image, e.g. .IMG) that can boot and run on this limited hardware. The file should be exactly 256,256 bytes long if single-density, or 512,512 bytes long of double-density. (Actually, anything bootable on this hardware would be appreciated!) I'm new to this forum - let me know what is the protocol for giving you my email address... Thanks! Martin E.

1 year, 1 month

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null modem for DEC Pro 380

by Cameron Kaiser

DEC Pro owners: does the DEC Professional use a straight-thru serial cable, or null? -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com -- BOND THEME NOW PLAYING: "All-Time High" from "Octopussy" -------------------

1 year, 1 month

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VCF EAST 2025 CALL FOR VOLUNTEERS!

by Jeffrey Brace

Volunteers are the backbone of making VCF East one of the best vintage computer shows. We are in need of volunteers in all areas. VCF East 2025 <https://vcfed.org/events/vintage-computer-festival-east/> takes place April 4-6 in Wall, NJ at the InfoAge Science and History Museums. Register to become a volunteer today! <https://docs.google.com/forms/d/e/1FAIpQLScRIqB1ZuseQ2ANYszT2RTw2_AMnnCv0ZI…> Click here to read Volunteer FAQ <https://vcfed.org/vcf-east-volunteers-faq/> Thanks! Jeff Brace VCF East Showrunner Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/>

1 year, 1 month

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AI? Really?

by Anders Gustafsson

Yes. I tried Operas Aria and asked a bit about HP1000 A-series. I started by asking the difference between A900 and A400 and got a reply that was partly correct, then followed up with some specific questions about the A400 that I happen to know rather well. It insisted that it had only 32Mb and it corrected itself. But the problem as always was that the answer LOOKED ok, but there was no way, without prior knowledge to weed out the errors. -- Med vänlig hälsning Anders Gustafsson, ingenjör

1 year, 1 month

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

by Anders Gustafsson

OK. As usual was the problem quite evident, once I understood it... I have two A400 boards. On that board I tested with I never took note of switch 8. It was unfortunately set to OFF indicating that there was backup power for memory. Thus the power lost flag was never set, which caused the parity error on startup. -- Med vänlig hälsning Anders Gustafsson, ingenjör

1 year, 1 month

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CDC Cyber 18x parts

by hupfadekroua

Hello all, I‘m searching the following CDC parts: 52948476 CM Board extender 91915206 CM Board extender 24614635 ZIF Board extender Of course I do know looking for such kind of items in our days may be some kind of peculiar, but who knows … Andreas

1 year, 1 month

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Try Algol 68 on Windows

by Mike Parr

Hello all. Here is a link to something I wrote - brief intro to Algol 68's background, and how to run it on Windows - with a toy IDE as well. https://mikeparr.info/algol68.html Mike Parr

1 year, 1 month

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cctalk January 2025