test-drb July 2019

test-drb@ccmp.vtda.org

138 participants
116 discussions

eBay: 1982 Prime Computer

by jnc＠mercury.lcs.mit.edu

This is listed under the informative title "vintage computer": http://www.ebay.com/itm/291934825422 which leads me to post it here under a more informative title, hoping that someone here has a soft spot for Primes! Noel

5 years, 4 months

RS2030 MIPS workstation

by pmackinlay＠hotmail.com

I?ve only just joined cctalk, so apologies for the delayed response to this query from May, but I thought the information might be useful to others in future. I?m the person working on emulating MIPS workstations in MAME recently, and I?m a fair way through getting the Rx3230 model to a fully working state (Rx2030 is already working as of last month). For the MIPS Rx3230 systems, which use an M48T02, the mac address should be in the first 6 bytes of NVRAM. You can read/write the NVRAM through the boot monitor using the ?g? (get) and ?p? (put) commands. You also need to provide the ?-b? argument to specify byte width, and the relevant address. The NVRAM is mapped at 0x1d000000-0x1d001fff in the physical address space, but must also set the high bit to access it through kseg0. Each 32-bit word in that range corresponds to a single byte in the NVRAM, so the resulting commands will be something like: * g -b 0x9d000003 (read first byte of NVRAM) * g -b 0x9d000007 (read second byte of NVRAM) * ... Or conversely: * p -b 0x9d000003 0xff (write 0xff to first byte of NVRAM) I haven?t tried to decode the rest of the NVRAM for the Rx3230 at this point (although most of the monitor variables seem to be at offset 0x600-0x6a7), but at least I can see those are the bytes that are read from NVRAM and then written to the mac address of the LANCE, and setting them to a valid address makes the network layer in MAME behave as expected. -- Pat.

5 years, 4 months

HP-2250 in Salt Lake City

by Tim＠Rikers.org

Someone on this list, I don't remember who, asked me if I was interested in this, and then dropped it off. I've not gotten around to doing anything with it, and I could use the space back. If anyone is interested, holler. HP 2250 Measurement & Control Processor Pictures are the same ones that came with it. Photographer unknown. https://photos.app.goo.gl/XjEj8E8vQ8KX9xcg8 If your interested in picking it up, email me directly, please. If you have more information to share, respond to the list. :) If anyone knows more about what this is, I'd be interested to hear. I got these links from Mike on the SIMH list: http://www.hpmuseum.net/display_item.php?hw=986 http://www.hpmuseum.net/document.php?hwfile=5124 http://www.hpmuseum.net/document.php?hwfile=4579 Mine is the "2250M" version. Apparently this heavy beast is "mobile" because it has wheels on it. :)

5 years, 4 months

AIX 5L/ia64 media?

by plamenspam＠afterpeople.com

I know it was a short lived, but anyone has the installation cd or iso image?

5 years, 4 months

New face of the Bank of England's £50 note is revealed as Alan Turing

by trash80＠internode.on.net

May be of interest to some list members https://www.bbc.com/news/business-48962557 Kevin Parker 0418 815 527

5 years, 4 months

TI99/4A computers, in original boxes

by sales＠elecplus.com

https://www.elecshopper.com/texas-instruments-ti-994a-computer-in-box-black- and-silver.html Only 4 of these on hand. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

5 years, 4 months

VCF Midwest 14 Overflow Hotel Block Open

by silent700＠gmail.com

Hello vintage fans! This is exactly the kind of problem a growing show wants to have, but it's a problem nonetheless. The Clarion Inn hotel attached to our show venue is FULL for Saturday night 9/14. There may be a few rooms left for Friday 9/13, but that doesn't do you a whole lot of good if you're staying the weekend. We have arranged a small room block at the Comfort Suites in Oak Brook Terrace, a short drive away from our hotel (sadly there was nothing nearby that was walkable). Room rates are the same ($109/night) and we have King and Double rooms reserved from Thursday through Sunday nights. More information and a booking link can be found here: http://vcfmw.org/hotel.html We recommend checking with the host hotel (Clarion Inn, info at the link) first in case a cancellation freed up a room before booking with Comfort Suites. And remember - the deadline to book a room is August 24th. They're not going to let us slide! Looking forward to seeing everyone there in September! -jt

5 years, 4 months

looking for a 7-track reel tape controller

by p.gebhardt＠ymail.com

Hello list, I have been looking for years for a q-bus or unibus-based disk controller that is able to handle 7-track drives (NRZI encoding). So far, I only located one controller type which handles that: Dilog DQ120 or DU120 and I never came across any. Any other suggestions regarding controller types?Contact me off-list if you are happy to part any 7-track tape controller with me. That would be very much appreciated :) Best regards,Pierre -----------------------------------------------------------------------------http://www.digitalheritage.de

5 years, 4 months

Your Heatkkit EC-1 analog computer

by rdawson16＠hotmail.com

Hi Jeff, I have hundreds of crystals here for you, and built a crystal tester (Jim Williams app note) https://www.analog.com/media/en/technical-documentation/application-notes/a… AN12 - Circuit Techniques for Clock Sources<https://www.analog.com/media/en/technical-documentation/application-notes/a…> Application Note 12 AN12-3 an12fa Figures 4a and 4b use another comparator based approach. In Figure 4a, the LT1016 comparator is set up with DC www.analog.com Brian and I are keen on making a new analog computer, possibly a kit. All new things, like the Analog Devices multipliers, better op amps etc, and possibly a USB, MIDI interface. Let us know how you come along on your bringup of the EC-1. The Heath manuals are the best in analog computing, on actual hardware. Randy

5 years, 4 months

Ill NLS MS-230

by brain＠jbrain.com

I have an ill NLS MS-230 Miniscope.? Is there anyone on list that might be interested in getting it running for me?? I'm willing pay for the privilege.? I'd like to see the unit working, but I have no experience with analog scopes, and I'd rather just entrust it to someone who can see it to success.? I did replace the batteries and let it charge for quite a while.? The red LED lights up on the front when on, but no sign of a trace, even when fed a known good 1kHz wave.? The CRT does not appear to be on. Anyone a fan of these units and might be interested in taking a look? Jim -- Jim Brain brain at jbrain.com www.jbrain.com

5 years, 4 months

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test-drb July 2019