test-drb

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101090 discussions

Free - IBM PS/2 model 30-286, 50, and 77 for spares/repairs. (Bristol, England)

by tomjmoss＠googlemail.com

Hi All, I have a few IBM PS/2s in various states of disrepair that are free to anyone willing to collect from Yatton (Near Bristol), or arrange a courier. Systems as follows: Model 30-286 - powers on to BASIC prompt, bad floppy drive, missing hard drive. A few minor scuffs, should make an easy restoration. Model 50 - Boots from HDD to DOS, has bad sectors but might be OK after a low level format, haven't tried it because the FDD is bad. Includes untested tape drive in the second 3.5" drive bay. Some rust spots on case. Model 77 - Very good cosmetic condition but doesn't power on, corrosion around the BIOS chip so I'm guessing it's because of that. If anyone's interested I can take photos and find out the system specs. I also have one of the later IBM PS/2 mice. Regards, -Tom

9 years, 3 months

PDP-11 RL02 disk emulation

by jnc＠mercury.lcs.mit.edu

> From: Scott Baker > Feedback on this project is most welcome. Any chance it could be put into 'production'? It just seems to me that rather than having 53 people send in individual orders for boards, etc it would be better (and also perhaps get a price break due to volume) to do a small run. (You may not want to produce complete boards, but even kits would be useful.) I think an RL02 simulator is a great idea; those of us with RL0x controllers could use this most of the time, avoiding potential damage to our old drives/disks; I know I would buy several if they were available. Also, what FPGA board are you using? I assume it's one that has an SD card socket or something, for actually storing the bits on? Noel

9 years, 3 months

VTServer/etc for V6 Unix

by jnc＠mercury.lcs.mit.edu

The fact that the installation procedures for V6 and V7 are wholly different, in their technical detail, was apparently not well known. The 'Setting up Unix' documents are more checklists, they don't go into a lot of detail as to what is actually happening, so I have prepared two pages on the Computer History wiki: http://gunkies.org/wiki/Installing_UNIX_Sixth_Edition http://gunkies.org/wiki/Installing_UNIX_Seventh_Edition which go into more detail on what is actually happening. Noel

9 years, 3 months

OT: Excessive bounce notices?

by kspt.tor＠gmail.com

On 22 October 2016 at 17:27, Adrian Graham <witchy at binarydinosaurs.co.uk> wrote: [..] >> Same story from me, and I also wondered about the excessive bounces - >> because of gmail. > > Ditto, and ditto. I also thought it was due to the dyndns attack so just > resubbed after emailing Jay, but if everyone did that who got an excessive > bounce message the poor chap will have quite a full inbox. Yes, it must have been that attack. I wasn't aware of it at the time, probably because I rely on 8.8.4.4. DNS which was never affected. We still need that global task force to hunt down spammers and ddos'ers and get rid of them once and for all. Or at least inflict some discomfort.

9 years, 3 months

Unibus disk controller with modern storage

by shadoooo＠gmail.com

Hello Dave, exactly! But in place of a plain FPGA, nowadays I would choose a FPGA-ARM board, for example the ZedBoard MicroZed or the Myirtech Z-turn, both of them have a Zynq onboard, and they can run linux for the software side and programmable logic for the interface side. Very nice and flexible. For the development, I'm trying to figure if an hybrid QBUS / UNIBUS solution is possible. Of course one have to switch some jumper to avoid conflicts, but hey, in the end you would have a true universal board. What kind of bus transceivers did you used for the QSIC, specially because you have to go from 5V open-drain logic to 3.3V logic? Thanks Andrea On 10/21/2016 07:00 PM, cctalk-request at classiccmp.org wrote: > You mean, perhaps, something like this? > > http://pdp10.froghouse.org/qsic/html/overview.html

9 years, 3 months

Looking for HP98034 / HP9895 ROM images

by cruff＠ruffspot.net

> On Oct 18, 2016, at 11:00 AM, cctech-request at classiccmp.org wrote: > > does anyone of you happen to have the images of the firmware ROM of > HP98034 module and/or of the HP9895 disk drive, please? I?ve sent F.Ulivi the contents of the single ROM version from my 9895A, along with some preliminary reverse engineering work on the contents that I?ve done in conjunction with Eric Smith.

9 years, 3 months

OT: Excessive bounce notices?

by barythrin＠gmail.com

Just curious, I probably could have just asked Jay but incase this was wider spread I received a message that my subscription at my Gmail was suspended due to bounces. I was wondering if that may have been only today and more widespread from the Dyn dns ddos that happened? If so others may want to double check for similar issues as I probably missed some messages today. No biggie, just a PSA if it affected more than myself.

9 years, 3 months

Altos 686/886 (i286) MFM drive parameters

by aek＠bitsavers.org

micropolis 1325 --sectors 16,0 --heads 8 --cylinders 1024 --header_crc 0xffff,0x1021,16,0 --data_crc 0xffffffff,0x140a0445,32,5 --format WD_1006 --sector_length 512 40 meg disk in the system used a 1323, 4 heads instead of 8

9 years, 3 months

Are DEC TK50/TK70 tapes worth hanging onto?

by dzubint＠vcn.bc.ca

OK, I have a fairly large collection of VAX 4000 and VAXStation 3000 systems which I have fun with and use with both OpenVMS and OpenBSD over the years.... But, I also have two big rubbermade containers (about half a cubic meter) filled with TK50 and TK70 tapes which I have never used. Some are blank, some are the boot & install media for VMS 5.5, some are software installations, etc. etc. In the past 25 years that I have had them, I have not once ever used my TK50 or TK70 drives...I've always either booted off the attached disks or netbooted. Should I just throw these things out? Do any collectors consider them to be valuable? Since it's now 2016 and I think the last TK tapes were made in the 1990s, I'm getting the urge to toss them. Opinions? Comments? --------------- Thomas "PDP-11" Dzubin Vancouver, Calgary, or Saskatoon; CANADA

9 years, 3 months

Re: Archived viruses, was Re: Reasonable price for a complete SOL-20 system?

by barythrin＠gmail.com

I wouldn't dismiss it if you're using images or any used software. Yes some platforms are more susceptible than others but unless you have no hard drive, power your system off after every use, and never switch disks while system is running it's still something that can infest your originals or archive. Dan's great collection of cpm is a good example of something that ended up passed around the community and had a few infected images. ?Depending on whether it's a file, boot sector, MBr or TSR it will different and potentially detrimental impact. I stopped archiving my Amiga disks but at a place I worked that had Amiga systems some kids brought in lots of games (some cracked) and while we didn't allow that it was spring break and they had finished their work. What's the worst that could happen? Kids slowly starting to walk up and say their computer says it's infected with a virus. Probably one disk but who knows how many were infected after that. Took me longer just to find an antivirus for the Amiga than to get the systems cleaned lol but still, an unexpected pain. One of the best preventative methods if the software doesn't need to write to the originals is write protect the floppy. ?But buying used, who knows if the previous owner was computer savvy or safe. -------- Original message --------From: Steven M Jones <classiccmp at crash.com> Well, glad to hear there's nothing to worry about.?

9 years, 3 months

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