Re: Diversified Technology CAT904 80286 single board PC
i rather do what doe with ibm dos Le lun. 15 mars 2021 à 16:23, Tom Uban via cctech a écrit : > It dawned on me that I probably just need to change a BIOS setting. I > haven't dealt with PCs in so > long I've forgotten what to do... > I would still like to find a manual if someone has one. > > > I have a Diversified Technology CAT904 80286 single board PC in a system > with a 5.25" floppy drive > running DOS. > > I would like to switch the system to use a 3.5" drive and am wondering > if anyone has a manual for > the dip switch settings for this board or if I can simply add a 3.5" drive > as a 2nd device on the > floppy cable (guessing not without switch changes)? > > > > --tnx > > --tom > >
VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot
I had some extra A4 pages with a VAXstation 2000 manual which covered a preview PK2K kit for VMS, bootloader and ROM to allow use of the VAXstation 2000 SCSI controller for more than just tapes. Rough scan at http://sync.absd.org/vax/VAX-PK2K-preview-kit.pdf (the originals will be sent to someone who can do a better job) The pages led me to http://ftp.gwdg.de/pub/vms/ which includes some goodies: - http://ftp.gwdg.de/pub/vms/pk2k - uVAX-2k SCSI patches with source for boot roms, VMB & VMS - http://ftp.gwdg.de/pub/vms/ka420 - ROM patches for KA420/KA430 boot from >1GB disks - http://ftp.gwdg.de/pub/vms/dk-552/ - VMS 5.2 patch to allow to accept more SCSI disk devices (Starting a new thread in case there is (slightly) more general interest for anyone interested in using the onboard uVAX-2K SCSI controller more more than tapes (OK, OK, for anyone not running NetBSD on their uVAX-2K interested in etc etc) - have cross posted to cctalk & port-vax - hopefully not violating any conventions there) David
Re: 80286 Protected Mode Test
On 3/15/21 7:23 AM, Noel Chiappa via cctalk wrote: > From: Guy Sotomayor > the LOADALL instructions including all of it's warts (and its inability > to switch back from protected mode) Good to have that confirmed (for the 286; apparently it works in the 386). The 386 loadall instruction was different (not really a surprise since the internal microarchitecture was different). The 386 didn't need to do this "hack" because it had vm86 mode for tasks so that accomplished what everyone was really using LOADALL on the 286 for. > the other way to get back to real mode from protected mode is via a > triple-fault. Any insight into why IBM didn't use that, but went with the (allegedly slow) keyboard hack? At this point I don't recall. But I suspect it was allegedly simpler conceptually. -- TTFN - Guy
PDP-10 I/O notes
For what it's worth I've posted some notes on PDP-10 I/O from a course taught by Mike Bennett at UWO in the early 1970s. The monitor at the time was likely prior to 5.06. See: http://www.execulink.com/~dstalk/pdp-10_io.pdf Don
DEC Professional: software and docs for CP/M and PC-Bridge boards
I have two oddball CTI boards for my DEC Professional: a DEC-made CP/M board (P/N 54-15641) and a board labelled "VIRTUAL MICROSYSTEMS PRO BD. REV 1" which appears to be an x86 MS-DOS board (it contains an 8086, a video controller and a bunch of RAM). I've managed to get them both functional, I believe, but I don't have software or documentation for either. I did find the RCS/RI diskettes at https://web.archive.org/web/20040113090630/http://starfish.rcsri.org/rcs/pdp-11/Professional/Pro-CPM/, but although the image files are uncorrupted it appears the diskettes were not read reliably in the first place. And I also know that at some point the PC-Bridge software and doc set was available on eBay (https://www.worthpoint.com/worthopedia/virtual-microsystems-pc-bridge-2-2005998357). Does anyone know where I can get a copy of the diskettes and/or documentation? Thanks. --Bjoren Davis
Re: 80286 Protected Mode Test
> From: Guy Sotomayor > the LOADALL instructions including all of it's warts (and its inability > to switch back from protected mode) Good to have that confirmed (for the 286; apparently it works in the 386). > the other way to get back to real mode from protected mode is via a > triple-fault. Any insight into why IBM didn't use that, but went with the (allegedly slow) keyboard hack? Noel
RE: VAXstation 2000 network & hardware guides (English & German)
David & Rob Are these "loose leaf"? If so I am happy to scan, upload, and then pass the paper to Rob who isn't far from me Dave > -Original Message- > From: cctalk On Behalf Of David Brownlee > via cctalk > Sent: 15 March 2021 09:43 > To: r...@jarratt.me.uk > Cc: General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: VAXstation 2000 network & hardware guides (English & German) > > Hi Rob > > I forgot to mention I'm in the UK :) > > I had another email in from someone in Germany who has access to a book > scanner - if you're setup to scan and upload EK-NETAA-UG-001 VAXstation & > EK-VAXAB-IN-002 I'm happy to part them out to you as you emailed first - let > me know > > David > > On Sun, 14 Mar 2021 at 19:25, Rob Jarratt > wrote: > > > I would be interested in EK-NETAA-UG-001 VAXstation 2000, MicroVAX > > 2000 and VAXmate Network Guide and the EK-VAXAB-IN-002 VAXstation > 2000 > > Hardware Installation Guide would be nice if you get no takers. You > > don't say where you are located. I suspect shipping from the USA to > > the UK would be too expensive, or is this in Germany? > > > > Regards > > > > Rob > > > > > -Original Message- > > > From: cctalk On Behalf Of David > > > Brownlee via cctalk > > > Sent: 14 March 2021 18:08 > > > To: General Discussion: On-Topic and Off-Topic Posts > > > > > > Subject: VAXstation 2000 network & hardware guides (English & > > > German) > > > > > > I have acquired a tiny slice of Orange Wall, and wondered if anyone > > would be > > > interested - preference for anyone who is setup to scan and upload > > > the missing bits to bitsavers or similar :) > > > > > > These seem to already be generally available online > > > EK-NETAB-UG-002 Workstations and MicroVAX 2000 Network Guide > > > EK-VAXAB-OM-002 VAXstation 2000 Owner's Manual (Covers how to > > > replace your mouse balls, and details exciting options such as LN03, > > > LN03 PLUS, LPS40, LA210, LA100, LA75, LA50. LGC01, LVP16, DF224, > > > DF124, DF112, > > VSXXX- > > > AB :-p) > > > > > > These I cannot immediately find > > > EK-NETAA-UG-001 VAXstation 2000, MicroVAX 2000 and VAXmate > Network > > > Guide > > > EK-VAXAB-IN-002 VAXstation 2000 Hardware Installation Guide > > > > > > Likewise these German versions > > > EK-NETGA-UG-001 VAXstation 2000, MicroVAX 2000 und VAXmate > > > Netzwerk-Anleitung EK-A0305-IN 001 VR160 Installations-und > > > Bedienungsanleitung > > > EK-A0355-OG-001 Grafikkoprozessor (8 Bildebenen) fur die VAXstation > > > 2000 > > > Installations- und Bedienungsanleitung > > > > > > Thanks > > > > > > David > > > >
Re: 80286 Protected Mode Test
On Sun, 14 Mar 2021 at 19:37, Guy Sotomayor via cctalk wrote: > > At the time I was fairly familiar with the LOADALL instruction. I had > modified PC/AT Xenix to use the LOADALL instruction to allow for running > Xenix programs and multiple DOS programs simultaneously. Incidentally, I believe that OS/2 1 was not the only 286 OS affected by this. The development versions of DR's Concurrent DOS 286 could multitask DOS apps in protect mode on pre-release 286s, but Intel "fixed" the feature that permitted this in the first shipping version of the 80286, to DR's dismay and horror. https://books.google.cz/books?id=2y4EMBAJ=PA17#v=onepage=false AIUI the feature was later restored, but customer uncertainty, together with suddenly-questionable compatibility with all the 286s out there, killed CDOS 286. I suspect this is instrumental in why DR took FlexOS and X/GEM down the RTOS route instead... in which form it survived and a distant descendant, formerly IBM 4690 OS, is still sold by Toshiba. -- Liam Proven – Profile: https://about.me/liamproven Email: lpro...@cix.co.uk – gMail/gTalk/gHangouts: lpro...@gmail.com Twitter/Facebook/LinkedIn/Flickr: lproven – Skype: liamproven UK: +44 7939-087884 – ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053
Re: VAXstation 2000 network & hardware guides (English & German)
Hi Rob I forgot to mention I'm in the UK :) I had another email in from someone in Germany who has access to a book scanner - if you're setup to scan and upload EK-NETAA-UG-001 VAXstation & EK-VAXAB-IN-002 I'm happy to part them out to you as you emailed first - let me know David On Sun, 14 Mar 2021 at 19:25, Rob Jarratt wrote: > I would be interested in EK-NETAA-UG-001 VAXstation 2000, MicroVAX 2000 > and VAXmate Network Guide and the EK-VAXAB-IN-002 VAXstation 2000 Hardware > Installation Guide would be nice if you get no takers. You don't say where > you are located. I suspect shipping from the USA to the UK would be too > expensive, or is this in Germany? > > Regards > > Rob > > > -Original Message- > > From: cctalk On Behalf Of David Brownlee > > via cctalk > > Sent: 14 March 2021 18:08 > > To: General Discussion: On-Topic and Off-Topic Posts > > > > Subject: VAXstation 2000 network & hardware guides (English & German) > > > > I have acquired a tiny slice of Orange Wall, and wondered if anyone > would be > > interested - preference for anyone who is setup to scan and upload the > > missing bits to bitsavers or similar :) > > > > These seem to already be generally available online > > EK-NETAB-UG-002 Workstations and MicroVAX 2000 Network Guide > > EK-VAXAB-OM-002 VAXstation 2000 Owner's Manual (Covers how to replace > > your mouse balls, and details exciting options such as LN03, LN03 PLUS, > > LPS40, LA210, LA100, LA75, LA50. LGC01, LVP16, DF224, DF124, DF112, > VSXXX- > > AB :-p) > > > > These I cannot immediately find > > EK-NETAA-UG-001 VAXstation 2000, MicroVAX 2000 and VAXmate Network > > Guide > > EK-VAXAB-IN-002 VAXstation 2000 Hardware Installation Guide > > > > Likewise these German versions > > EK-NETGA-UG-001 VAXstation 2000, MicroVAX 2000 und VAXmate > > Netzwerk-Anleitung EK-A0305-IN 001 VR160 Installations-und > > Bedienungsanleitung > > EK-A0355-OG-001 Grafikkoprozessor (8 Bildebenen) fur die VAXstation 2000 > > Installations- und Bedienungsanleitung > > > > Thanks > > > > David > >
