test-drb June 2010

test-drb@ccmp.vtda.org

167 participants
232 discussions

by wdonzelli＠gmail.com

I have a bunch of IBM PS/2 model 77s here that are not long for this world. If there is any serious interest, please let me know. If no real interest, into the grinder they go! Please contact off list. I am in 10512. If you want me to ship, I need to have it worth my while. -- Will

14 years, 7 months

Programing PDP-8 assembler - details

by bqt＠softjar.se

Ben <bfranchuk at jetnet.ab.ca> wrote: > Johnny Billquist wrote: > >> > The system calls, information about file system stuff, and all other >> > information you need to write programs in assembler is documented in the >> > OS/8 SOFTWARE SUPPORT MANUAL >> > Don't know if it's available online, but I would suspect so. > > It is online, and as scanned text file. It printed out rather > clean on the laser with only a few blank pages. Saw that later. Good. That means you have everything you need. >> > Johnny >> > > The important thing is got windows ( hyper-term ) and the > SBC6120 with k12mit ( Kermit ) talking to each other today. > The PDP 8 was promoted as paper tape system, and it is > harder to think of communicating with it remotely. > I still will do most of my editing in DOS box, since the line > editor is pain to use with the PDP 8. Why use a line editor? There are several full screen editors for OS/8. Really fast and nice ones. Johnny

14 years, 7 months

Ultrix Media

by aek＠bitsavers.org

> Trouble is I am not > entirely sure what to do with the individual files to make an Ultrix virtual > tape. Anyone know? > You put them together with the right blocking factors and file marks to make a .tap image. I've uploaded some earlier versions to http://bitsavers.org/bits/DEC/vax/ultrix to show you what they should look like. I probably should do the same for the 4.x versions he has.

14 years, 7 months

Programing PDP-8 assembler - details

by bqt＠softjar.se

Ben <bfranchuk at jetnet.ab.ca> wrote: > What are the programs needed to program under OS/8 in assembler > using OS/8 as I/O for the assembler? What is the OS/8 handbook > that lists the OS/8 system calls for OS/8 use from assembler. > IS IT ONLINE as pdf? > Planing to write a few new programs for the 8, because we have the > technology. > Ben. Programs needed? PAL8 is the standard assembler, and ABSLDR is the normal linker/loader. The system calls, information about file system stuff, and all other information you need to write programs in assembler is documented in the OS/8 SOFTWARE SUPPORT MANUAL Don't know if it's available online, but I would suspect so. Johnny

14 years, 7 months

yet another pdp-8 in a fpga, but this time running tss/8

by bqt＠softjar.se

Ben <bfranchuk at jetnet.ab.ca> wrote: > Looking back with the emulators, of vintage hardware > it is the fact that expensive things like mass-storage > could be shared among several people. I have just been > installing some PDP 8 software on a IDE drive and even > with the small size of PDP 8 disks ( 2048k max ) you > sure can see how small programs and data was back then. > With a PDP 8 multi-tasking the programs I expect where > dog slow, but they could run with larger memory and > disks a larger machine could justify. In all fairness, there is no such limitation on the size of disks on PDP-8s. OS/8 have a limitation on disks being no more than 4096 *blocks*, but that's a limitation in that OS, which is based on the fact that just one word is used to specify the block number for device drivers. Larger disks (which weren't that unusual) had to be presented as several logical disks to the OS, in order for them to be fully used. So an RL02 (as an example) looked like five disks to OS/8. RL0A, RL0B, RL0C, RL0D and RL0E. All about 2M each. As for multi-tasking - no, that was/is not dog slow. Most of the time it was perfectly fine even for several interactive users in parallel. Johnny

14 years, 7 months

PS/2 Model 95

by ball.of.john＠gmail.com

I have come upon the mother of all Microchannel cards and now have in my ownership a completely maxed IrisVision card with the driver discs, cables and the technical reference manual. You would not believe how hard it was to get hold of this thing. While I already have a Microchannel system, a 55SX, it's running AIX 1.3 and it's not worth it putting this card into that. What I want to drop it and a few other nice cards I have collected like MCA sound and GPIB is something like a Model 95 but for some reason I have terrible luck with them. With the first one the deal went as far as paying for shipping before the guy reconsidered, refunded me and recycled it. The other system and a half that another collector had I almost got last month was working several years ago and was as maxed as you could possibly get but was put into a garage and over time due to poor placement and clueless relatives, both systems were first written off my the harsh pacific coast air and then thrown away because they looked to be worthless prior to them moving. I'm still on the hunt for one and got all the extras I would ever need like the Type 3 complex with an upgraded 5x86 processor, the reference manual and diskette and a few other accessories like an internal CD drive and recently I came across a 10/100 Microchannel card but still the 95 eludes me. Why are these systems so remarkably hard to find when you need them? I know someone who recycled about a dozen five months ago but of course, he didn't know I needed one. :P

14 years, 7 months

Seeking early Quantum AT drive specifications

by thomas.gardner＠sbcglobal.net

Hi I am looking for copies of early Quantum AT drive manuals such as QUANTUM PRODRIVE 40/80AT TECHNICAL REFERENCE MANUAL, REV. A dated 10/90, or any other early Quantum Prodrive AT drive manual. I'm interested in anything up to and including the ProDrive 425AT. I have data sheets but I would like more detail on the IDE implementation. Contact me off line. Tom Gardner (650) 941-5324

14 years, 7 months

yet another pdp-8 in a fpga, but this time running tss/8

by brad＠heeltoe.com

I know it's crazy, but I finally got my FPGA based PDP-8/I to boot TSS/8. http://colo3.heeltoe.com/download/pdp8/README.html It's been sort of working for a while but had some odd bugs. I did a lot of simulation and comparison with simh. I think it's pretty close to correct now. There are still a few bugs to clean up but it seems to run everything correctly and save files to the disk. I hope to agument my "disk maker" to extract and rebuild tss/8 file systems soon. It would be nice to build up disks from some of the decus programs. Right now it will extract and replace the main parts of TSS/8 but not the file system itself. -brad -- Brad Parker Heeltoe Consulting +1-781-483-3101 http://www.heeltoe.com

14 years, 7 months

Ultrix Media

by robert.jarratt＠ntlworld.com

I would like to install Ultrix on SIMH VAX. So far I have found only this: ftp://ifctfvax.harhan.org/pub/UNIX/thirdparty/Ultrix-32/ult400vaxdist-tk50/s up/, I was pointed there from here: http://gunkies.org/wiki/Installing_Ultrix_4.0_on_SIMH. Trouble is I am not entirely sure what to do with the individual files to make an Ultrix virtual tape. Anyone know? Regards Rob

14 years, 7 months

seeking atmel 29c256

by dgriffi＠cs.csubak.edu

Does anyone here know of a decent supply of 29c256 flash EEPROM chips or a drop-in replacement? I'm having a nasty time trying to source these for the P112 project. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

14 years, 7 months

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test-drb June 2010