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Re: ROM to Flash Adapter for HP Portable PC ROM Drawer help

by Martin.Hepperle＠dlr.de

Mike, you might also want to have a look at https://www.hpmuseum.org/forum/thread-15356.html For testing , I have used a regular EPROM mounted on an external PCB and connected it with a ribbon cable to the ROM drawer. There are ribbon cable - DIP connectors with thin pins, which can be used without destroying the sockets inside the ROM drawer. You should not use normal pin headers as these pins are too thick and will damage the sockets. Unfortunately, many replacement solutions use such headers. You can buy individual, thin pins, but these are relatively expensive (e.g. at Mouser). The height of a replacement should be similar to a normal EPROM, so a thin PCB with a flat SMC Flash RAM might be a viable solution. This will also require a programming adapter. On the other hand, 128 KB capacity is still rather limited - e.g. Turbo-C header files are too large to fit into one EPROM, even if compressed by removing comments and whitespace. However, it should be possible to link software over two 128K modules, as was obviously done with Word Perfect in the days (see the Portable Paper). This linking requires some modification of the FAT entries in the image files, which I have not yet tried. Martin

5 months

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Need a dot-matrix impact printer?

by Van Snyder

Do you need to print on multi-part carbon or NCR forms? Do you need a dot-matrix impact printer? I have a Star Micronics SB-10 dot-matrix impact printer. It has a parallel interface. My late brother was using it so I assume it still works. None of my computers have a parallel port so I can't test it. Printer, cable, manual, spare ribbon, original shipping packaging. If you want it, it's yours for the price of a PDF shipping label, 20" x 20" x 10" 30 pounds.

5 months

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Vendor for data recovery from TK50 and TK25 tapes?

by dbrock＠computerhistory.org

Hello everyone! I'm new to the list, but am posting here on the suggestion of Chuck Guzis. I'm a curator at the Computer History Museum, and am trying to identify a vendor who could potentially work with us to recover data from a set of TK50 and TK25 tapes that came to us in an archival collection. Any pointers would be much appreciated. I can be reached directly at dbrock(a)computerhistory.org Thanks in advance for your time, David

5 months, 1 week

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networking on CTOS

by r.stricklin

Trying to experiment with TCP/IP (and, to a lesser extent, OSI and BNet cluster) networking on a Convergent/Unisys CTOS system (SuperGen SG3600). Am experiencing several anomalous results and would love to have a chat with someone who has real experience with this… if some such person is on the list. Thanks! ok bear.

5 months, 1 week

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VCF East 2025 tickets now on sale!

by Jeffrey Brace

https://events.humanitix.com/vintage-computer-festival-east-2025 Jeff Brace VCF East Showrunner Vintage Computer Federation is a 501c3 charity

5 months, 1 week

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NeXT computer system...

by John Robertson

I'm just starting to clean up a NeXT system that a friend has had in storage for decades... I assume the thing has a battery somewhere - I just hope it isn't Ni-Cad! This is the original cube, monitor, keyboard (& mouse?), printer, assorted cables, and a SCSI secondary hard drive box. So far the manuals haven't shown up, but that is all online AFAICT. My plan is to give them all a good cleaning, then open up and inspect capacitors, look for batteries and any other perishable items, and then do diode checks prior to considering powering up. The remembered background story was a nearby lightning strike may have taken out the (1200 baud?) external modem, so will be paying extra attention to the serial ports! Sniff test may still be useful even after 20ish years. Any suggestions on what else to watch for on this setup prior to first power? I also will be using the Dim-Bulb setup once it seems safe to turn on. Anyone seen a common problem in power supplies for these components for example? Planned destination is auction... Thanks! John :-#)#

5 months, 1 week

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VCF Montréal Survey

by Jeffrey Brace

This survey is in its final days. You are invited to add your anonymous input by clicking here https://bit.ly/vcfm2026pre-en Ce sondage entre dans ses derniers jours. Vous êtes invité à ajouter vos commentaires anonymes en cliquant ici https://bit.ly/vcfm2026pre-fr DATE: January 25 & 26, 2026. LOCATION: Montréal, QC, Canada Jeff Brace VCF National Board Member Chairman & Vice President

5 months, 1 week

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FYI: The ongoing, 40 years long search for Aleph Null

by Tomasz Rola

Howdy, The subject of Aleph Null's real identity appeared on HN... :: Who was Aleph Null? Posted on 2 September 2013 by Brian Hayes http://bit-player.org/2013/who-was-aleph-null :: https://news.ycombinator.com/item?id=43195308 Intriguing. He must have been known by somebody, back in the day. -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola@bigfoot.com **

5 months, 2 weeks

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Anybody need a dot matrix impact printer?

by Van Snyder

Anybody need a dot matrix impact printer? Do you need to print multi- part forms with carbon paper or NCR paper? I have a Star Micronics SB-10 dot matrix impact printer. It has a parallel port interface. I have the cable, manual, and a spare ribbon. None of my computers have a parallel port so I haven't tried to use it. I put it on EBay, but mostly I don't want to throw it in the E-waste bin. It's yours for pickup or shipping, but I won't complain if you offer me something for it. 30lb. 20x20x10 inch box.

5 months, 2 weeks

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Thousands of new Data General documents added to the on-line archives...

by Bruce Ray

Thousands of new documents have been added to the DG legacy preservation web site [www.NovasAreForever.org], including new sections for the Nova, SuperNova, Nova 2, Nova 3, microNova, MPT, Eclipse S/130, Eclipse S/140, Eclipse S/230, Eclipse C/330, Eclipse S/280, and Desktop Generation computers.(!) Separate areas also now exist for DG disks, tapes and other peripherals. New archives for 3rd-party, DG-compatible hardware vendors have been started with this release, including those for Keronix, DCC, Bytronix and ROLM. This update reflects Wild Hare's continuing dedication [obsession?] to preserve Data General's significant part of computer history, and to help museums, universities and "restorationists" preserve DG systems worldwide. Bruce Ray www.NovasAreForever.org -- Bruce Ray, President Wild Hare Computer Systems, Inc. Denver, Colorado USA bkr(a)WildHareComputers.com ...preserving the Data General legacy: www.NovasAreForever.org

5 months, 2 weeks

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