test-drb

test-drb@ccmp.vtda.org

101090 discussions

by bvasea＠gmail.com

Hello I have the Qualstar Tapestar Package for DOS. It is fully working. However it requires a Microtech MCS1 "TAPE816" 16-bit ISA Pertec controller. I have the full Ms-Dos package. Where do I send the software package to be uploaded to bitsavers?

5 years, 3 months

80286 Protected Mode Test

by jnc＠mercury.lcs.mit.edu

> 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

5 years, 3 months

Wagner WAC40

by Rice43＠btinternet.com

Hi, I recently bought a core rope memory unit from a Wagner WAC40, mainly because it?s very aesthetically pleasing and looks good on display: https://i.redd.it/h9sb550uhnm61.jpg However, i can fine very little about Wagner Computer, the WAC40 (and WAC12), or the man behind the company, G?nter Wagner. Does anyone have any info on any of these subjects? This links seems to be all i can find: https://blog.hnf.de/gauner-gelder-und-computer/ Thanks, Josh Rice

5 years, 3 months

Diversified Technology CAT904 80286 single board PC

by new_castle_j＠yahoo.com

I've got a Diversified Tech 286 SBC as well and was able to switch to 3.5 floppies by modifying the BIOS settings. Mine has the Dallas Real Time Clock chip and the battery was dead so the BIOS settings weren't preserved after a reboot. Fortunately I obtained a replacement chip available on ebay to fix that issue. I haven't got a manual to share, but it's a neat little board. Jonathan On Tuesday, March 16, 2021, 12:00:02 PM CDT, <cctalk-request at classiccmp.org> wrote: Send cctalk mailing list submissions to ??? cctalk at classiccmp.org To subscribe or unsubscribe via the World Wide Web, visit ??? http://www.classiccmp.org/mailman/listinfo/cctalk or, via email, send a message with subject or body 'help' to ??? cctalk-request at classiccmp.org You can reach the person managing the list at ??? cctalk-owner at classiccmp.org When replying, please edit your Subject line so it is more specific than "Re: Contents of cctalk digest..." Today's Topics: ? 1. VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot ? ? ? (David Brownlee) ? 2. Re: Diversified Technology CAT904 80286 single board PC ? ? ? (david raingeard) ? 3. Re: PDP-10 I/O notes (Lars Brinkhoff) ? 4. who collects modems? (Tom Uban) ? 5. Re: Any info on a Western Peripherals DC-230 disk controller? ? ? ? (Jay Jaeger) ---------------------------------------------------------------------- Message: 1 Date: Mon, 15 Mar 2021 18:36:23 +0000 From: David Brownlee <abs at absd.org> To: rob at jarratt.me.uk,? "General Discussion: On-Topic and Off-Topic ??? Posts" <cctalk at classiccmp.org>, port-vax List <port-vax at netbsd.org> Cc: Malte Dehling <mdehling at gmail.com> Subject: VAX rom patches - VAXstation 2000 SCSI boot, KA420 > 1GB boot Message-ID: ??? <CAGN_6pbBzUQDJP-YiCQRZsaNOsGye1oWQ_ULyvavEd52ZrYp2Q at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" 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 ------------------------------ Message: 2 Date: Mon, 15 Mar 2021 16:41:54 +0100 From: david raingeard <david.raingeard at gmail.com> To: Tom Uban <tom at figureeightbrewing.com>,? "General Discussion: ??? On-Topic Posts" <cctech at classiccmp.org> Subject: Re: Diversified Technology CAT904 80286 single board PC Message-ID: ??? <CAFvDS1SvQZFE_dzGQaheyLRpFqh-ZqFZyyWpBaMg_D22gZ+8kA at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" i rather do? what doe with ibm dos Le lun. 15 mars 2021 ? 16:23, Tom Uban via cctech <cctech at classiccmp.org> a ?crit : > 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 > > ------------------------------ Message: 3 Date: Tue, 16 Mar 2021 06:04:44 +0000 From: Lars Brinkhoff <lars at nocrew.org> To: Don Stalkowski via cctalk <cctalk at classiccmp.org> Subject: Re: PDP-10 I/O notes Message-ID: <7wzgz3zlab.fsf at junk.nocrew.org> Content-Type: text/plain Don Stalkowski wrote: > 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. Thank you! Interesting to see the DECtape file structure format. ------------------------------ Message: 4 Date: Tue, 16 Mar 2021 09:48:33 -0500 From: Tom Uban <tom at figureeightbrewing.com> To: "General Discussion: On-Topic and Off-Topic Posts" ??? <cctalk at classiccmp.org> Subject: who collects modems? Message-ID: ??? <d22a7559-5c13-28e5-eec0-b1587b5c5a79 at figureeightbrewing.com> Content-Type: text/plain; charset=utf-8 Clearing out stuff at my space, I have the following modems: NEC UltraLite-Series Image Modem Plus w/box CTS Datacomm 2424 ADA modem w/box Scout Plus External Data/Fax modem w/box Digital DF03 modem Any offers? --tom ------------------------------ Message: 5 Date: Tue, 16 Mar 2021 11:23:28 -0500 From: Jay Jaeger <cube1 at charter.net> To: Josh Dersch via cctalk <cctalk at classiccmp.org> Subject: Re: Any info on a Western Peripherals DC-230 disk controller? Message-ID: <0877749a-9d01-466e-9e59-854977e13808 at charter.net> Content-Type: text/plain; charset=utf-8; format=flowed I may have a little info - but the info is in storage, and it is just a "Western Peripherals Instruction Reference Card", apparently referring to the DC-230, PDP-11 and TC-130 (the latter being a tape controller, for which I do have some doc.) Once the weather warms up again - say, maybe this weekend, I'll trot off to storage, bring it back and scan it. Back in the 1970's the UW Madison CS Department's 11/20 had a 3rd party disk controller of some sort - one pack removable, one fixed, but I don't remember who made it (might have been Wangco). JRJ On 3/12/2021 5:02 PM, Josh Dersch via cctalk wrote: > Any ideas what this disc controller is? > > https://www.ebay.com/itm/PDP-11-Backplane-Western-Peripherals-DC-230-Disk-C… > > Can't find much about this on the 'net, other than that it was a controller > for Diablo/Pertec style drives -- no idea if it's an RK11 clone or > something else entirely. Looks to be suitable for a PDP-11/20 given the > little notch missing from the side there, and the lack of a separate power > harness for the backplane. > > - Josh > End of cctalk Digest, Vol 78, Issue 16 **************************************

5 years, 3 months

Diversified Technology CAT904 80286 single board PC

by david.raingeard＠gmail.com

i rather do what doe with ibm dos Le lun. 15 mars 2021 ? 16:23, Tom Uban via cctech <cctech at classiccmp.org> a ?crit : > 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 > >

5 years, 3 months

DEC Professional: software and docs for CP/M and PC-Bridge boards

by bdweb＠mindspring.com

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/pd…, 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-2-200…). Does anyone know where I can get a copy of the diskettes and/or documentation? Thanks. --Bjoren Davis

5 years, 3 months

80286 Protected Mode Test

by jnc＠mercury.lcs.mit.edu

> From: Jim Stephens > The 286 can exit protected mode with the LOADALL instruction. Really? So why all the hullabaloo about Triple Faults: http://www.rcollins.org/Productivity/TripleFault.html back in the day; and why did IBM set up the keyboard controller so it could send a RESET signal (so people could get out of protected mode)? Or is it that LOADALL (which was also undocumented early on, so maybe that's why the IBM thing) could be used to cause a triple fault? Noel

5 years, 3 months

VAXstation 2000 network & hardware guides (English & German)

by mdehling＠gmail.com

I'd be interested in the guides if you're located in Germany, and I do have access to a book scanner. Best, MalteOn Mar 14, 2021 19:08, David Brownlee via cctalk wrote: > > 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

5 years, 3 months

Classic browsing and duckduckgo

by rtomek＠ceti.pl

Howdy, I more often than not use one of the old style browsers (lynx, dillo etc). Using search engines with them was rather uncool (unusable links in search results, wanting to load some bs or js, etc). For this reason I type my searches using mozilla and very rarely trying this with duckduckgo and almost never with goog. Today I noticed that duckduckgo redirects my classic browsers to lite.duckduckgo.com and I can use the results. Cool! Tried with dillo and w3m. -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola at bigfoot.com **

5 years, 3 months

80286 Protected Mode Test

by robert.jarratt＠ntlworld.com

I have a DECstation 220 (Olivetti M250E) which is failing POST on a "simple test of the 80286 protected mode". It says in a service manual I have that for this test the CPU is set in the protected mode, the machine status word is checked to see whether it indicates the protected mode and then exits protected mode. This test seems to be failing. Is there any possible explanation for this other than a failed 80286 CPU? Could there be any external reason? This board suffered some battery leak damage. Clearly the 80286 is working well enough to execute this diagnostic and send some text to the screen, so it basically works. Thanks Rob

5 years, 3 months

Help with PCB ID

by coryheisterkamp＠gmail.com

I?m wondering if anyone recognizes this PCB. Double-sided, 74xx vintage, measuring 14?x15?. There?s a ?B.I.? logo in one corner, but no google match. IC date codes are ?77/?78 vintage. There?s a pair of DB-25?s, a BCD encoder, and for some reason, two pots. DC rectification appears to take place onboard. I thought perhaps the 112-7753 marking might be a part or catalog number, however the flip side is marked 112-1754, so perhaps not. Anyone recognize it? -Cory https://photos.app.goo.gl/dogAPxn7vLV87YRw9

5 years, 3 months

Looking for gnupro for BeBox BeOs PowerPC

by david.raingeard＠gmail.com

Hello, I am looking for cygnus gnupro for powerpc BeOS, to be able to make ports. thank you

5 years, 3 months

PDP-8 Backplane on eBay

by jnc＠mercury.lcs.mit.edu

There's a PDP-8 (/E or /M) backplane (presumably OMNIBUS) on eBay: https://www.ebay.com/itm/0-slot-Backplane-H1919-9216/402735040240 (The number is given incorrectly in the title; it's actually 'H9191'.) Noel

5 years, 3 months

[GreenKeys] OT FTGH Xerox 820

by jfoust＠threedee.com

Richardson, TX I assume. At 09:42 AM 3/11/2021, John, W9DDD wrote: >I have a Xerox 820 (rev 2 -II?) that will go to it's happy hunting grounds soon unless there is interest. > >Pictures if interested, part it out if it gets to that point. > >(On topic to the extent it makes room for more Teletype equipment.) > >-- >John, W9DDD >______________________________________________________________ >GreenKeys mailing list >Home: http://mailman.qth.net/mailman/listinfo/greenkeys

5 years, 3 months

[GreenKeys] OT FTGH Xerox 820

by jfoust＠threedee.com

At 09:59 AM 3/11/2021, Tom Uban wrote: >I am interested if this is not already spoken for. I'm sorry, I forgot to include the giver's email. "John, W9DDD" <w9ddd at tapr.org> Contact him directly. - John

5 years, 3 months

Is DECtape Read/Write Head "In-the-Weeds" Info Available?

by bobvines00＠gmail.com

Does anyone have "in-the-weeds" information on the DECtape read/write heads? I've got several TU-55 transports and a box of DECtapes (thank you very much Doug!) _and_ Michael's failed DECtape head from several years ago that I'm de-potting. I very much want to figure out how to repair Michael's DECTape head and will return it to him if I can do so. I've read the document that Al posted a link to in the discussion on DF32s: Message-ID: <1e97981e-05d9-f272-d2fe-10ae38da6668 at bitsavers.org> ... "remided me of the problems with rhodium plating on RF08 drives here on page 9 http://archive.computerhistory.org/resources/access/text/2012/08/102746014-… " The "Oral History of Grant Saviers" is interesting and gives a lot of information about various storage technologies that were used over the years. It reminded me of my desire to learn everything I can about DECtape _and_ DECtape transports. Maybe the CHM or someone else has interviews or tech data that helps answer my request? Bob

5 years, 3 months

Need to have a roll of paper punch tape read by a tape reader and printed

by camiel.vanderhoeven＠vmssoftware.com

Gary, I don't know if you're in Europe or elsewhere. I'm in the Netherlands, and I could do that free of charge. I'd also make a video recording of the process for your sons education. Camiel ________________________________ From: cctech <cctech-bounces at classiccmp.org> on behalf of Gary Dye via cctech <cctech at classiccmp.org> Sent: Monday, March 8, 2021 11:30 PM To: cctalk at classiccmp.org <cctalk at classiccmp.org> Subject: Need to have a roll of paper punch tape read by a tape reader and printed Hi folks. I wrote a basketball program in Basic over 40 years ago in high school. I printed the 13 pages of code, and produced a roll of paper punch tape of the code, but the 13 pages were destroyed, leaving me with only the paper tape. My 14-year-old son was pretty fascinated to see the roll of computer punch tape -- paper with holes in it! -- that we used to store files in the old days. And that we didn't have computer screens, but only a teletype element that printed -- one letter at a time -- the back-and-forth information between the timeshare computer and the teletype (output). This paper punch tape is the Basic program that I wrote in high school that played a random basketball game (as called by Bill Schonely, radio voice of the Portland Trailblazers). I'm trying to find someone to run it through a tape reader so that I can retrieve the code and play the game again. I'm hoping to explain the code to Owen so that he might understand the power of coding and get interested in coding. Is there anyone out there that I can send my roll of paper tape to such that the code can be restored? I could pay some compensation for your troubles. Much appreciated, Gary This e-mail (including any attachments) may contain privileged, confidential, proprietary, private, copyrighted, or other legally protected information. The information is intended to be for the use of the individual or entity designated above. If you are not the intended recipient (even if the e-mail address above is yours), please notify us by return e-mail immediately, and delete the message and any attachments. Any disclosure, reproduction, distribution or other use of this message or any attachments by an individual or entity other than the intended recipient is prohibited.

5 years, 3 months

DF32?

by cz＠alembic.crystel.com

There's a DF32 on Ebay. I've got a bid in on it, will see what happens. In the unlikely event I win I'll have to build a system to adapt the Negibus to the pdp8/L. However did the pdp8/L have 3 cycle data break? C

5 years, 3 months

Need to have a roll of paper punch tape read by a tape reader and printed

by marvin＠west.net

OOPS on my last response... I should have said I found the original on the CCTECH archive. Hope there was no confusion there!

5 years, 3 months

Need to have a roll of paper punch tape read by a tape reader and printed

by marvin＠west.net

FWIW, I went back to the CCTALK archives and could not find the original message either. Being curious, I went back to the CCTALK archives and there it was. > Hi folks. I wrote a basketball program in Basic over 40 years ago in high school. I printed the 13 pages of code, and produced a roll of paper punch tape of the code, but the 13 pages were destroyed, leaving me with only the paper tape. My 14-year-old son was pretty fascinated to see the roll of computer punch tape -- paper with holes in it! -- that we used to store files in the old days. And that we didn't have computer screens, but only a teletype element that printed -- one letter at a time -- the back-and-forth information between the timeshare computer and the teletype (output). This paper punch tape is the Basic program that I wrote in high school that played a random basketball game (as called by Bill Schonely, radio voice of the Portland Trailblazers). I'm trying to find someone to run it through a tape reader so that I can retrieve the code and play the game again. I'm hoping to explain the code to Owen so that he might understand the power of coding and get interested in coding. > > Is there anyone out there that I can send my roll of paper tape to such that the code can be restored? I could pay some compensation for your troubles. > > Much appreciated, > > Gary

5 years, 3 months

Tymshare PDP-10 tapes

by lars＠nocrew.org

Hello, Someone sent me these magtape images from Tymshare and said "they fell off the back of a truck on route 62 in Hudson, MASS." I don't know their provenance. Sorry, I don't have any good hosting. For now they are here: https://gitlab.com/larsbrinkhoff/tymshare The download.sh script will retrieve individual files one by one rather than cloning the repository; next use cat.sh to get the .tape.bz2 files. The tape format is close to not not quite FAILSAFE. With help from Joe Smith, I made a tool to extract the files: https://github.com/larsbrinkhoff/pdp10-its-disassembler/blob/master/tito.c

5 years, 3 months

From SIMH list: Whirlwind software recovery

by phil＠ultimate.com

> From: "Christian Brunschen" <christian at brunschen.com> > Date: Mon, 8 Mar 2021 21:45:11 +0000 > Subject: Re: [simh] recovering software for the MIT Whirlwind > To: simh at groups.io > > https://www.historia-mollimercium.com/whirlwind/ww-page.html > https://www.historia-mollimercium.com/whirlwind/Whirlwind-Software-Recovery… > ? > > On Mon, 8 Mar 2021 at 21:41, "Nelson H. F. Beebe" <beebe at math.utah.edu> > wrote: > > > The latest issue of IEEE Annals of the History of Computing has an > > article that may be of interest to some list members: > > > > G. C. Fedorkow > > Recovering Software for the Whirlwind Computer > > IEEE Annals of the History of Computing 43(1) Jan/Mar 2021 pp. > > 38--59 > > https://doi.org/10.1109/MAHC.2020.3048815

5 years, 3 months

Spelunking the places where files are not

by jfoust＠threedee.com

At 03:16 AM 3/8/2021, Tor Arntsen via cctalk wrote: >Linux distros come with a standard tool to do some of that, >'testdisk'. From the overview: I'm familiar with the various undelete tools for Windows and Linux. Such tools may not exist or make sense for older file systems. Entire files would be great to find, but I suspect interesting fragments may be more likely. Running a Windows-based tool like Recuva on a hard drive leads to such a firehose of fragments if you choose the deep scan that examines all unused blocks. I've only tried the free version. Does the pro version give you a way to exclude all the dozens of OS file types that are probably not the user-made files that you want? And for the archaic disk formats, it would be good to have platform-specific methods of identifying fragments to guess their file type beyond executable and ASCII. Older run-length compression image formats may be more possible to recover than today's block-compressed images. - John

5 years, 3 months

RSTS processor identification

by paulkoning＠comcast.net

I was just asked some questions about how RSTS identifies your processor type. Since that topic might be of broader interest I figured I'd do some code reading and summarize the logic. In the RSTS initialization code (INIT.SYS), the first step is to identify what your hardware looks like. That is a combination of CPU type, bus type, memory layout, and peripheral configuration lookup. They aren't strictly separated into sequential blocks for those four activities, though naturally you'd want to know the bus type before you start looking for I/O devices on that bus. What I describe here is in RSTS/E V10.1. The general idea of scanning the hardware was introduced in V6B, and I believe is basically the same from that time onward apart from the addition of support for more hardware types. Prior to V6B, the assumption was that you had the hardware you specified during SYSGEN, neither more nor less. Here is an outline (not all the details) of the hardware scan flow: 1. If word 0 of the boot block contains a zero, this is a Pro (CT bus); otherwise it isn't. 2. Make sure the MMU exist; if not, halt. 3. Check the CPU type (MFPT instruction). If it's an F-11, see if 177570 exist. If yes, 11/24 (Unibus); if no, 11/23 (Qbus). If it's a J-11, read the board type register at 177750 and use the bus type bit to distinguish Qbus from Unibus. 4. Check that there is a clock, and if possible determine the power line frequency. 5. Check if there is a CPU cache, and whether there is a cache error address register. 6. If Qbus, check whether there is memory above the 18 bit range. 7. Check that there is at least 96kW of memory (but the message says that 124kW is required -- the actual check value was apparently overlooked and not updated). 8. Check CPU features: EIS (required), FPP, FIS, switch register, display register, MED, two register sets, system ID register, CIS, Data space. 9. If Unibus, check for UMR. 10. Find where memory is. This is done by looking at every 1kW address to see if it answers. So unlike some other operating systems, RSTS will keep looking if it finds a hole in memory. The kernel needs to be at 0 and contiguous, but holes above that are not a problem. 11. Scan the I/O bus for peripherals. This uses the fixed addresses and float rules for Unibus/Qbus (either, the code doesn't care) or the slot use bits and device type register codes for the Pro. 12. Find the vectors, which for almost every device is done by making it interrupt. 13. Identify specific device models if we care, like RL01 vs. RL02, Massbus disk type, DMC/DMR/DMP, etc. 14. Find which of these devices we were booted from. That's about it. Once you get past that point the INIT prompt appears and you can ask what INIT found with "HARDWARE LIST". Incidentally, RSTS doesn't try to identify the exact CPU type you have. Instead, it cares about features or distinctions that affect the code. In a number of cases it does report the type -- if MFPT works then "hardware list" will report that information. But for older CPUs, it doesn't say explicitly, though you can deduce it to some extent. If no type is given but there is cache and more than 128 kW of memory, it's an 11/70. If MED is available, it's an 11/60. If it has FIS, it can only be an 11/40. Etc... paul

5 years, 3 months

RSX11D disks on EBAY- anyone interested?

by lee.gleason＠comcast.net

? Saw this on EBAY today - three RK05s with what looks like at least part of RSX11D on them. Who knows, it might be a distribution - RSX11D distributions came on 3 RK05s. https://www.ebay.com/itm/PDP-11-RSX-11D-Executive-Programs-Phase-II-3xRK05-… ? The auction starts at? more than I have in my computer budget this month, though - would some other RSX historians like to go in together on this (preferably at least one person with an RK05 drive)? ? I'd just like the contents of the disks - I don't care about the physical disks, just what's on 'em -- Lee K. Gleason N5ZMR Control-G Consultants lee.gleason at comcast.net

5 years, 3 months

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test-drb