- cctalk - classiccmp.org

by Christian Corti

Basically, this message is just a test. The list server seems to be utterly buggy and broken at the moment. What is the reason? Christian

11 months, 3 weeks

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List problems

by Christian Corti

And worse, I do see some messages in the Mailman frontend, but I don't receive any email from the list server any more. Christian

11 months, 3 weeks

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Re: Seeking Remex RRS3300 Paper Tape Reader info

by David Wise

If anyone has info on this model, please reply or contact me. Thanks. I recorded video of my RRS3300 reading and winding. Since my initial post, I discovered that the machine needed even more civilizing, and I ended up reducing the reeler speed from 200IPS to 100IPS. Link here: https://www.youtube.com/watch?v=dmWAguLki6o . The spiral-wrapped cables at the top go to a microcontroller, which reads the sprocket-hole signal and retards the phase control ramp. [https://www.bing.com/th?id=OVP.qNKj3Byj-dGoXSwjoQbt0AHgFo&pid=Api]<https://www.youtube.com/watch?v=dmWAguLki6o> Remex RRS3300 Paper Tape Reader<https://www.youtube.com/watch?v=dmWAguLki6o> Demonstrating my Remex RRS3300 paper tape reader, made in 1970 with discrete/TTL/DTL technology. The 300cps reader section uses capstan drive and electromagnetic brake instead of a stepper and pinwheel. The spooler is permanent split capacitor AC induction motors, electromagnetic brakes, relays (mechanical and discrete solid-state ... www.youtube.com

11 months, 4 weeks

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QIC Archival

by Cameron Kelly

Hello, I have a QIC tape of an interesting piece of software that doesn’t seem to be archived anywhere. I don’t have experience using QIC tape so I’m inquiring if anyone here would be willing to offer the service. The software in question is “CorelDraw For Unix”. Thanks, Cameron

11 months, 4 weeks

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IEEE Spectrum: When IBM Built a War Room for Executives A new video captures a remarkable 1968 demo of IBM’s Executive Terminal

by Christian Liendo

As time goes on new things are found. When IBM Built a War Room for Executives A new video captures a remarkable 1968 demo of IBM’s Executive Terminal https://spectrum.ieee.org/ibm-demo

11 months, 4 weeks

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Re: Information on Trend UTR 700 Paper Tape Reader and Facit 4060 Punch

by Malcolm Clark

Hi Martin, I am looking for a manual for the above tape reader and found your details from a discussion on cctalk from July 2022. I am a volunteer at The National Museum of Computing and an ex Ferranti engineer. I am currently restoring an Argus 500 computer and trying to get it back to its original configuration. I have recently restored 2 Trend HSR 500 readers and now have acquired 2 UDR 700 readers that need to be fixed and set up. My latest video on YouTube https://youtu.be/8HtRqe6jzc8?si=MmRL4qbh_7PZjVff In the email you said you had scanned the document into a file. Would it be possible to upload it to Google Drive and send me the link so I can download it? Ultimately I would like to upload it to the Museum archive and make it available for everyone to view. I am assuming that there are no copyright issues as Trend was finally wound up as a company in December 2022. Hope to hear from you soon Kind Regards Malcolm Clark

11 months, 4 weeks

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Old mainframe humor

by Donald Whittemore

NEAT/3 instructions www.myimagecollection.com/webdocs/neat3.pdf Misc instructions www.myimagecollection.com/webdocs/pl-o.pdf Misc Assembler www.myimagecollection.com/webdocs/miscassembler.pdf IBM beginnings www.myimagecollection.com/webdocs/beginning.pdf New IBM OS www.myimagecollection.com/webdocs/newibmos.pdf

12 months

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Re: VT-100 Text Windows library

by Henry Bent

If this were my project, I would start by getting newlib going and then seeing if I could use that to run an older (presumably more simple, with fewer requirements) version of screen. -Henry On Mon, Dec 9, 2024, 22:04 Mike Katz <bitwiz(a)12bitsbest.com> wrote: > Overlapping would be amazing, different screen quadrants at a minimum. I > am going to try to port Txwindows as that is the only package I could find > > On Dec 9, 2024 8:40 PM, Henry Bent <henry.r.bent(a)gmail.com> wrote: > > On Thu, 5 Dec 2024 at 20:26, Mike Katz via cctalk <cctalk(a)classiccmp.org> > wrote: > > Thank you. > > Screen is a linux utility. I am writing this on a bare metal (no > operating system) ESP32 dev board. > > Right now the program is text menu driven. I would like to enhance it > with textual windows. > > The Txwindows package is perfect but over kill and will need some > hacking to work in my environment and it doesn't support the VT-100's > region scrolling so screen updates might be slow. > > > What might be helpful is if you could be more specific about what it is > you're trying to achieve. Do you want arbitrarily sized, overlapping > windows or do you just want the screen divided up into discrete segments? > > -Henry > > >

12 months

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Sequent RAM identification help

by Aaron Taylor

Hello, While cleaning my garage I ran across 100+ sticks of RAM that I can't identify. Does anyone recognize these? Are they of use to anyone? https://imgur.com/a/xUnBuEg Note that there are two types of RAM in the photos and they have different keying notches in the middle of the connector. One has a PCB copyright of 1997 and the other is 1999. Both are marked "Sequent Computer Systems", and are buffered, ECC, 256 MB, 50 ns, EDO RAM. Aaron

12 months

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Philips P2000C disk format

by Tony Duell

The quick version : Does anyone know the exact physical and logical disk format used by CP/M on the Philips P2000C portable computer? The long version with explanations : I am having reasonable success transfering files to/from disk images for my Osborne 1A (using cpmtools) and IBM5155 (MS-DOS, of course using editdisk). And I've even got the Greaseweazle to transfer those images to/from real floppies. The Greaseweazle still annoys me in that I know it's capable of a lot more if only I could work out how to do it, but at least it does something useful [The less said about floppy disks shedding oxide and/or suffering from 'sticky shed' the better. I'm spending far too much time dismantling and cleaning drives....] Any, I'd like to do the same for another of my machines, a Philips P2000C cp/m 'portable'. My machine is the version with 2 internal 40 cylinder single head drives (about 160K each, MFM) but I can also plug in an external 80 cylinder double head drive to handle this machine's other native format (about 640K). Unfortunately, this machine is not common, and neither cpmtools nor the greaseweazle software has the formats predefined. I could add them myself -- if I knew what they were. Things like #sectors/track, sector size, #system tracks, skew, etc. It's not obviously given in any of the manuals I have, so does anyone know it before I try to work it out. Alternatively there are rumours that the P2000C could read/write at least one more common cp/m disk type. The hardware should be capable of it, sure. Doe anyone know if software to do something like this exists anywhere for the P2000C. I can't find it on any of the obvious sites -tony

12 months

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