test-drb October 2016

test-drb@ccmp.vtda.org

203 participants
312 discussions

raytheon 706 computer users manual at SMECC

by COURYHOUSE＠aol.com

We have in the library: "raytheon 706 computer users manual" at SMECC. Wanted to see if it was online somewhere. Nice shape tight binding with an additional errata and addendum pamphlet accompanying it. I see bitsavers has manual but not pmphlet.Also there is no color front and back cover, which if you have the computer is cool artwork for a display. - Anyone with a 706 out there? Ed# _www.smecc.org_ (http://www.smecc.org)

7 years, 6 months

mc68010+mc68451 Unix source?

by seefriek＠gmail.com

From: Al Kossow <aek at bitsavers.org> > > the will probably be 68000 > > unisoft kernels i've used weren't 010 with the 451 > Dumb question...did the '451 have a mechanism to work around the instruction restart issue in the 68000? Or was there some other way that was handled? > i'll have to dig around for what bits of the 451 kernel i still > have around. unisoft kept the mmu parts pretty well isolated since > the did so many hw ports I'd be grateful. KJ

7 years, 6 months

Imaging Old Disks Advice Needed

by pete＠pski.net

I?ve recently acquired a rare complete set of 10 TRS-XENIX 1.0 Development System floppy disks. I?ve done quite a bit of 8? disk imaging so I'm fairly comfortable using ImageDisk, cleaning disk heads, etc. I?ve run into a scenario with these disks that I have not had to deal with before. Since this is the only complete set of this software I?ve ever seen, I need to be really careful with how I proceed. The media itself looks pretty good. No scratches, no blotches. However, on a number of disks the sleeves have warped. I am afraid that this will damage the media when I spin them up. I?m thinking of cutting open the sleeves and placing the media in new 8? floppy sleeves. I?ve also heard about baking the media, although I?ve never tried this and not sure of its value. What are your thoughts on how to proceed?

7 years, 6 months

DEC DSSI troubleshooting (RF71)

by witchy＠binarydinosaurs.co.uk

Hi folks, I've got my VAX3800 resuscitated after many years in limbo and two of the four RF71s in there have gone bad. Has anyone tried swapping the controller boards between drives? Is it just a matter of letting the drive auto-calibrate or do I need to SET HOST onto the controller and tell it it's on a different HDA... Here it is in a happier mood shortly after first powerup: http://www.binarydinosaurs.co.uk/VAX3800.jpg (not my best LK201 keyboard but it was the closest :) ) -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?

7 years, 6 months

HP-1000 12044A 12825A HDLC Interface manuals available anywhere?

by glen.slick＠gmail.com

I don't see these manuals online at either bitsavers.org or hpmuseum.net. Does anyone have copies of them available? 12044-90001 HDLC Direct Connect Interface Hardware Reference Manual (12044A for A/L-Series) 12825-90001 HDLC Direct Connect Interface Hardware Reference Manual (12825A for M/E/F-Series) I have more than one HP-1000 CPU. Just curious what it would take to connect some of them together running 91750A DS/1000-IV software.

7 years, 6 months

Booting PDP-11's from RX02's

by jnc＠mercury.lcs.mit.edu

So, I'm winding up to boot Unix V6 from an RX02 floppy. So I need two things: - Details of how DEC ROM bootstraps boot from RX02's. I vaguely recall seeing documentation of this somewhere (e.g. which sectors it loads, etc), but now I can't find it. Don North has dumps of the RX02 ROM's, but I'm too lazy to read through the code and figure out how they work. Is there some documentation which covers it? I did a quick Google search, but if there is anything out there, my Google-fu was inadequate. - Did anyone ever do an RX02 driver for the V6 disk bootstrap? (Well, I guess a V7 driver would work, too.) Note: what I need is _not_ either i) the Unix OS driver for the RX02 (I found one of those already), or ii) a driver for the v7 standalone second-stage bootstrap (which would probably be in C). The thing I'm looking for would be called rx.s, or something like that. Yes, I could write it, but again, I'm lazy! :-) Noel

7 years, 6 months

Compupro Disk Images Uploaded

by billdegnan＠gmail.com

I have uploaded a set of disk images from My Compupro system with an 8085 and 8086 card, plus regular z80. The thread starts a number of years ago, but today I just updated, at the bottom, to include images of the disks I have for the system. Some interesting concurrent CPM and DOS stuff, not sure if this is really MS DOS 1.25 or not, never got it to work on my system. I'd love to see someone else make it work. Thread: http://vintagecomputer.net/browse_thread.cfm?id=265 Just get the IMD images: http://vintagecomputer.net/disk_images/COMPUPRO/ As always, thanks Dave Dunfield, please use the images with the proper licenses, etc. Bill

7 years, 6 months

SEEKING GOOD ILLUSTRATIVE MATERIAL ON IBM ADD ON BOXES GOT A STACK..

by COURYHOUSE＠aol.com

SEEKING GOOD ILLUSTRATIVE MATERIAL ON IBM ADD ON BOXES GOT A STACK.. So need hi res scans of catalogs brochures etc showing them all stacked and what when with what. We had an early IBM pc for a while....but never this many add on boxes! I am lost... Remember back in the 80s I sold HP stuff... any help and guidance appreciated to make this all come together into something nice visually! thanks Ed Sharpe archivist for SMECC couryhouse at aol.com

7 years, 6 months

DEC bus transceivers

by jnc＠mercury.lcs.mit.edu

Re: DEC bus transceivers > From: allison > Actually since about 1987 I've used about 1200 pieces of the 8641 alone > repairing boards at the commercial level. Well, that's over almost 30 years - and your total from that period is about 4% of the remaining stock (and in a commercial operation, to boot, not hobbyist)... > If you going to build a board or three maybe even 20 its not a big deal > but its not a reliable source of predictable quality. Sure, but try looking at it from our perspective: we either use an out-of-production part, or have to design something (almost certainly from discretes) that meets those specs; and we actually looked at the latter (viz. Dave B's design). However, after some pondering, and taking everything (including all the below) into account, we decided to go with the original chips, since they were still sorta available. Which is why both we and Guy have stocked up on them, at the start of the process: we don't want to crank out boards designed for a certain part, and then not be able to get the out-of-production parts the boards were designed to use. If we were designing something for serious production, that wouldn't be an option, but for limited-volume hobbyist use, it is. The choice of an out-of-production part does have a down-side, but it's minor (and mostly alleviated by the pre-buying), and the other options were (in overall sum) worse. > If you get to the bridge your talking redesign in reality or an > expensive buy from unreliable source then testing them in bulk. But, but... I'm _already_ buying them from unreliable sources, then testing them! :-) But to be serious - if the demand for QSIC's, etc, runs the well of DS8641's dry, yes, we'll probably have to re-design. In other words, we'd be right where we'd be today if we decided not to use out-out-production parts. Noel

7 years, 6 months

ContrAlto V1.1 Released

by JoshD＠livingcomputers.org

Hi all -- Just wanted to let you guys know that a new version of the Xerox Alto emulator I've been working on at the LCM+L has been released; V1.1 of ContrAlto can be downloaded from: http://www.livingcomputers.org/Join/Online-Systems.aspx. At this point, the vast majority of software appears to be working properly, if you do run into any issues please let me know! ContrAlto is open source, so if you want to hack on it the source is available on our GitHub site at https://github.com/livingcomputermuseum/ContrAlto. Thanks! - Josh

7 years, 6 months

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test-drb October 2016