- test-drb@ccmp.vtda.org - classiccmp.org

by Billy.Pettit＠wdc.com

cclist wrote: On 1/16/2006 at 7:44 PM Philipp Hachtmann wrote: >What do you think? Do I have to be careful? I never thought I could >program my computer to death. >And such problems aren't mentioned in my programmers' guide and operation >manuals. IIRC, it was indeed a problem on the CDC 7600 PPU's. A very tight (e.g., UJN 0) loop would cause core to overheat. The 7600 added a duty-cycle integrator so that repeated accesses to the same location in a short amount of time would actually slow things down a bit to avoid that problem. But the 7600 was a very fast machine for its time. Cheers, Chuck Okay, Two points. Halt and Catch Fire was a fictious command. This was sort of an in-group joke. I first saw them described when the IBM 360 was announced in 1963. But they were already old at that time. I came across one of the lists a few months ago in a clean up. Others included: Read and Stretch Tape; Read Card and Shred; Seek Disk and Crash; Print Line and Jam Paper (w./ a variation of Print and Tear Ribbon); Type Wrong Character; Jump To Illegal Address; etc. You can probably create your own. In fact Datamation ran a humor article and asked for creative commands. They published some of the best ones. Any old timer refers to this class of humour as Halt and Catch Fire, since it was usually first on the list. My favorite was Execute and Hang, since it happened often in CDC 3000 machines. We called them Blue Sky commands since the machine went into an undefined state. I'll bet that some of the other old timers better organized than I, still have those lists and will reply with them. Second point. I worked on a lot of 7600s. And I was on the team that designed the Cyber 17X replacements. I never heard of one catching fire. The core ran at 27.5ns cycle time (actually, that was when the data was available - you still had to restore it, since core read out switched the state of the core). That was fastest that core ever was used in a commercial product. At least we advertised it that way. But, if you have a 7600 logic module, look at it closely. The modules is aluminum heat sink on 5 sides - the connector is on the 6th side. It screwed into a solid "cold bar" that had Freon piped through it. There were "cold plates" inserted between modules. All of this removed the heat from the module quickly. The PCBs are actually in a miniature refrigerator. The circuits had thermal compensation built in for the memory modules. Seymour had thought of tight loops and used them to test memory during design. Many of the field memory tests were coded to as tight as possible to stress the memory. Halt and Catch fire was a joke. I never heard of 7600 catching fire. We had a chassis melt once, when the refrigeration stopped and the fail safes all failed. But no fires. Billy

20 years, 7 months

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Stumbled across Ed Thelen's site today

by legalize＠xmission.com

....while looking for maps of Nike missile bases :-) At any rate, he's got a lot of computing ephemera online that doesn't look like its duplicated elsewhere. <http://ed-thelen.org/comp-hist/on-line-docs.html> This is probably "old news" to you guys, particularly since Al Kossow is quoted at the bottom of the page, but I found it cool anyway. :) -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years, 7 months

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RK07 questions

by henk.gooijen＠oce.com

Ok, I was so curious that I did the test with the servo head disconnected. It is sure a different movement! First let me describe the head movement in more detail. In stand-by, the heads are in what I call the "home" position. When the movement starts, the heads come out of the home position at a moderate speed, and when the heads are at "track 0", the speed drops and the heads move at a slower speed towards the centre of the pack. Then the movement stops, and starts at that same slow speed towards the home position. However, the heads stop at what I call that "track 0" position, and stay there until I press the LOAD button again. Then the heads move *fast* to the home position. Now with the servo head disconnected ... To quote 'Allo Allo': "listen very carefully, I will do this only once", well sort-of :-) The heads move at the moderate speed to "track 0", but stay at that speed while the heads move to the centre. That movement now looks a lot faster! At the centre the movement stops, and the heads move at that speed (or was it even faster?) not to the "track 0" position, but to the home position. The FAULT light is now ON. I reconnected the servo head. Time to sleep a night to get new fresh insights ... - Henk. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

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RK07 questions

by henk.gooijen＠oce.com

Hi all, I am working on the last peripheral device connected to my 11/34, two RK07s. This will be my first experience with RK07 drives, so I have a few questions. I installed the RK611 in the system (in an expansion box) and made sure that the UNIBUS is OK. The 11/34 starts, and I can boot RT11 from DL0:. ".SH DEV" shows that the DM.SYS driver is installed. However, after loading a pack the RT11 commands ".DIR DM0:" or ".INIT DM0:" report an error. I must say that the READY light did not turn ON on the drive. I switched the 11/34 OFF, because I think I need to take a closer look at the RK07 drive itself first. Here is what I did and saw. I removed the metal cover at the top-rear side. Now you can see the big magnet and the head assembly. I first checked the "emergency retract" mechanism. When you push down the lever that locks the heads, and gently push the head assembly forward toward the cartridge compartment, the heads are pulled back as soon as the little microswitch is (dis)engaged. Then I loaded a pack and pushed the LOAD button. After some 20 seconds the disk has spun up (I assume), because the heads start to move. The heads first move at a moderate speed toward the centre of the cartridge (I would say a full travel), stop, and then move back at that same speed, but not completely to the home position. Again, I *assume* that the heads detected track 0 and stay there. However, the READY lamp does not go ON. It could not, because the lamp was defective :-) After replacing the lamp with a checked-good lamp, I repeated the exercise. The heads show the same movement, but the READY light stays OFF. 1. Is that head movement behaviour correct? I will try to make a movie of the movement this weekend ... 2. What would the head movement be if the pack was bulk-erased? 3. Should the READY lamp go ON? An other thing I noticed. As the 11/34 is OFF, there is no controller connected to the RK07 drive. OK, it is, but not powered. With the RL drives the FAULT lamp will be ON if the controller is not powered. Is this the same for the RK07? The RK611 controller is not powered, but the FAULT lamp stays OFF. I did check that the lamp is OK. Is this correct behaviour? thanks, - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

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AC power on front panels

by henk.gooijen＠oce.com

Thanks for that remark, Pete! I did not want to go into "pedantic" mode, but I was indeed thinking about the capacitors in the EMI filter, but thought that chances are very slim that they fail. But they can! Once in ten years is good, except if it's *your* filter that fails :-) The caps in the EMI filter have a very small leakage current, so if you are 'energy-concious' pulling the plug is truely the only option. - Henk, PA8PDP. > -----Original Message----- > From: cctalk-bounces at classiccmp.org > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Pete Turnbull > Sent: dinsdag 17 januari 2006 9:06 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: AC power on front panels > > On Jan 16 2006, 13:59, Patrick Finnegan wrote: > > On Monday 16 January 2006 04:09, Gooijen, Henk wrote: > > > > I always pull the plugs on my PDP-11s, because the small > transformer > > > in the power controller is always connected. > > > > You could also just flip off the breaker on the power controller, > which > > disconnects everything* in the PCU from the mains. > > > > * Except for the EMI filter, inlet power cable, plug from the wall, > etc. :) > > I've had to repair 861 power controllers twice in the last > ten years or so -- once was indeed the EMI filter :-) > > -- > Pete Peter Turnbull > Network Manager > University of York This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

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AC power on front panels

by rcini＠optonline.net

All: I'm playing around with my relatively new IMSAI and I was pondering the following. The unit is constructed with the front panel power switch unconnected and the corresponding terminals on the power supply board jumpered together. There is a mains switch on the rear panel which takes the place of the front panel switch. While for safety reasons I cannot disagree with the approach - it's plain stupid to put uninsulated mains voltage in a low-voltage area (and unpassable by UL evaluators I'm sure) - it detracts a bit from its use because you have to reach behind the unit to turn it on. Has anyone come up with an elegant solution to being able to use the front panel power switch while keeping it safe? I was toying with some sort of low-voltage circuit (small LV transformer and relay, with the front panel switch in the loop on the coil side). Another idea I had was to hot glue a dielectric insulator board (that gray cardboard kind of stuff) over the parts of the front panel that would be exposed. Ideas? Too much time on my hands? Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

20 years, 7 months

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Speaking of 6502s, was Re: 70's micros still available -

by pete＠dunnington.plus.com

On Jan 17 2006, 9:39, Graham Toal wrote: > > On 1/4/06, Tony Duell <ard at p850ug1.demon.co.uk> wrote: > > > What languages were available for the BBC Micro (without a second > > > processor[1]), I wonder. I know about BASIC, Pascal, Forth, Lisp > > > > There was an Acornsoft BCPL. > > There is known to be a Beebug C, but I never managed to track it down. > > > > The C I did manage to track down (not proper C but Small-C, and indeed > > only a limited subset of even that) was done by Dr. A. J. Travis. I > > wrote a project in this, and really liked it. > > COMAL was very nice. What BBC Basic should have been ;-) > > I presume you do know about Acornsoft C. (I did some of the QA > on that compiler) > > There was a LOGO of sorts, I seem to recall, but hard pressed to > remember any details. It may have been a hack job in basic actually. I have here BBC BASIC (at least five versions), COMAL, LISP, Acornsoft FORTH, FORTH79, and JBFORTH (from HCCS) (and there's at least one more FORTH), Acornsoft LOGO (two 16K sideways ROMs), Logotron LOGO (one 16K ROM), HCCS LOGO (also one 16K ROM), microPROLOG, various 6502 assemblers, Beebug C (on a disk here somewhere), Acornsoft C, and BCPL. I'm sure there are more. I keep my ROM images in separate directories, and "Languages" is one of the larger ones. "FilingSysts" is a similar size, there are some smaller ones, and of course the catchall "Utilities" containing everything from spreadsheets to printer utils to graphics extensions is the biggest. You might be surprised to know that "Comms", containing terminal emulators, is the next biggest, though. -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

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deformatting floppies

by chrism3667＠yahoo.com

I would have thought it best to take a magnet to a hd disk before popping in a 720k drive to be formatted, but it seems to not have any (or much) effect. Even using a chunky rare earth magnet! Can someone explain? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 7 months

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Stupid Mac Ethernet question

by trag＠io.com

>Date: Sat, 14 Jan 2006 18:10:28 -0500 >From: "Richard A. Cini" <rcini at optonline.net> >Subject: Stupid Mac Ethernet question > I just recently upgraded the network cabling in my house to 5e >as part of some new construction, and I also upgraded the networking >components. Now, all of my normal machines run at 100 full duplex. Anyway. > > The strangest thing happened to my Mac IIci - the Ethernet >connection no longer works. I don't even get a link light on the new switch >(a Cisco/Linksys switch). However, when I plug the Mac into a plain old 10BT >hub and then uplink it to the switch, I at least get a link light. The solution (intervening 10Mbps hub) recommended by the other posters is the way to go--or change to a different ethernet card. This is a well-known (within vintage Mac circles) issue with older Asante ethernet cards. For some reason the 10/100 negotiation fails to work properly and the old 10Mbps card doesn't make a connection. Or you could try to find one of the old Asante or Farallon 10/100 NuBus ethernet cards. They seem to go for considerably more than the usual market value of the IIci. :-) Jeff Walther

20 years, 7 months

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Thinking about selling my VAX, any interest?

by alanp＠snowmoose.com

I have an 11/750 that I am thinking about selling. My storage situation may be becoming unstable and I am thinking that I would rather have it in a safe home than have to move quickly to somewhere less desireable. It is a 750 with an expansion cabinet, a TU80 tape drive, a SA482 (i think that is the number) rack and 4 disk drives (2 RA81s, 2 RA82s). It is located in the Seattle, WA area. Anyone interested in it? alan

20 years, 7 months

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Other lists for Vintage Video Games perhaps?

by lsprung＠optonline.net

Folks: I apologize in advance if anyone finds this question off topic, but is anyone aware of a list like this one for the topic of vintage video games? Thank you,

20 years, 7 months

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Not OT: Classic apps and the Intel Mac

by spectre＠floodgap.com

Well, the Intel Mac has emerged and with that we can conclude that the end of the Classic era is near, as Rosetta will officially not support Classic applications. This means a lot of legacy software is now suddenly worthless on the next generation of Macintoshes. Worse, I'm hearing a rumour that 10.5 will strip Classic out even for PPC Macs. Has anyone else heard this? I still use a number of 68K apps I picked up for a song because they do the job, they're fast, and they were cheap. I'm not giving that up so easily. -- --------------------------------- personal: http://www.armory.com/~spectre/ --- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- A kindness done today is the surest way to a brighter tomorrow. -- Anonymous

20 years, 7 months

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70's micros still available - was 1802 problems

by bobalan＠sbcglobal.net

I believe the Zilog Z80 is still made. At least it was in 2004. May be a different part number though. Bob Message: 16 Date: Mon, 02 Jan 2006 10:13:52 -0500 From: shoppa_classiccmp at trailing-edge.com (Tim Shoppa) Subject: Re: 1802 problems To: cctalk at classiccmp.org Message-ID: <20060102151352.66303BA47EA at mini-me.trailing-edge.com> Content-Type: text/plain; charset=us-ascii Pete Turnbull <pete at dunnington.plus.com> wrote: >> It was used because there was a rad-hard silicon-on-sapphire version, >> and then some people used the standard versions so they could use the >> same code and tools. > > Up until just a few years ago (2002?), Harris/Intersil web pages listed the SOS 1802 as a current product, along with more conventional CMOS 1802's and support chips. If I have the chronology right, Harris bought much of RCA's line in the 90's and Intersil bought them out a few years later. But they've been dropping a lot of classic parts (including the CA3046, which I never believed would go out of style! There are newer surface-mount differential pairs of course but not quite the same as the good old CA3046 in a can...) Many of the hobbyist-oriented retailers still have plenty of old stock though. What 70's era micros are still in production? Z80, I'm sure. 8088, probably (although probably not in an Intel fab.) Anything else? If I look in the BG Micro or Jameco catalog I see lots of 70's era micros and support chips but I'm sure that most of those parts are pulls or old stock. Tim. -------- > >

20 years, 7 months

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Unknown Honeywell tape drive - Full disclosure!

by aek＠bitsavers.org

Do you want to see my 9-track HP 7970B with 200, 556 and 800 bpi densities? -- Not necessary. I have two. If you look at the 7970B manual, there is a configuration matrix which shows that the only HP drive which supported sub 800 bpi densities and 9 track tapes is a read-only drive with dual 7 and 9 track head stacks. What would be more interesting is if you could find any place in the ANSI standards documenting a sub 800 bpi 9 track 1/2" tape format. 800bpi 9 track was invented by IBM for System 360, which went from 6 to 8 bit character encodings. There would have been no reason to support lower densities on these drives, since all of the previous IBM tape drives were 7 track.

20 years, 7 months

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Thanks again, Dave!

by cclist＠sydex.com

On 1/16/2006 at 4:39 PM Fred Cisin wrote: >On Tue, 17 Jan 2006, Tony Duell wrote: >> What is the chip (assuming ti's not just an 8272 / 765), and what floppy >> tape cards should I be looking for? > >IIRC 37C65 >definitely NOT a big deal. Also, National 8477, Intel 82077 (but not the AA-1; those will read, but not write FM); even the Intel 820781 should be okay for FM reading (depending on software, may require an oscillator change). Other non-compaticards that work just fine are the Sysgen Omnibridge; and the WD1002A-FOX. The add-in cards with the National DP8473 controllers are very nice. Not only do they read and write FM, but they'll also read and write 128 byte MFM sectors just fine. Cheers, Chuck

20 years, 7 months

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AC power on front panels

by pete＠dunnington.plus.com

On Jan 17 2006, 9:29, Gooijen, Henk wrote: > Thanks for that remark, Pete! > I did not want to go into "pedantic" mode, but I was indeed > thinking about the capacitors in the EMI filter, but thought > that chances are very slim that they fail. But they can! > Once in ten years is good, except if it's *your* filter that > fails :-) It was one of the big sealed metal can filters. I didn't think I'd be able to open it up and repair it without a blowtorch and excessive heat so I just replaced it. I don't know exactly what failed inside, but no power reached the rest of the box, so perhaps not a capacitor. The modern replacement filter was somewhat smaller and lighter, I recall. Having the Y-class suppressor caps blow up in input filters is a common failure mode in some SMPSUs, notable the ones used in BBC Micros. Several people have reported this on the BBC mailing list in the last year or two. -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

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In Germany: IBM Office System 6, Prozessor 6/420 from 1977

by fm.arnold＠gmx.net

Near Koblenz: an IBM Office System 6, Processor 6/420 from 1977. Waiting for a taker. Includes some training SW and handbook. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8749623945 Frank

20 years, 7 months

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AC power on front panels

by pete＠dunnington.plus.com

On Jan 16 2006, 13:59, Patrick Finnegan wrote: > On Monday 16 January 2006 04:09, Gooijen, Henk wrote: > > I always pull the plugs on my PDP-11s, because the small > > transformer in the power controller is always connected. > > You could also just flip off the breaker on the power controller, which > disconnects everything* in the PCU from the mains. > > * Except for the EMI filter, inlet power cable, plug from the wall, etc. :) I've had to repair 861 power controllers twice in the last ten years or so -- once was indeed the EMI filter :-) -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

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AIM65 test ROM redux

by rcini＠optonline.net

All: While cleaning up old email, I found this post I made in mid-2004: > While browsing an early-1980 issue of Compute magazine, I > saw a blurb for Rockwell offering copies of the manufacturing > test program for the AIM 65 computer. The blurb references a > test manual (#EA74-M800) and a test program listing > (#EA74-J100). It also indicates that on the manufacturing > line, two EPROMs with the test program are installed in the > BASIC ROM slots. > > Does anyone have either manual or the ROMs in question? > > Thanks. > > Rich Since it's been 18 months since that post I thought it worthy to re-post in case someone has come to possess this ROM and/or manual. Thanks. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

20 years, 7 months

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Helping fellow collectors . . .

by mtpro＠aol.com

I was not able to help these two people, if anyone can, please reply directly to them: --------------------------------- I'm wondering if you can help me. I'm looking for a copy of q-dos or 86-dos to complete my collection. Do you have any information on where I might find one? Thanks for anything you can provide. Christopher D Holmes chris at jli.coim --------------------------------- I am looking for a back issue of Stewart Alsop's PC Letter. I am looking for volume 7, issue 11 (dated June 2, 1991). Do you have this newsletter in your archives or do you know of anyone that might have back issues. Thank you for your time. Penny Krebs pdkrebs at aol.com --------------------------------- Best, David classiccomputing.com

20 years, 7 months

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NASA mission to Pluto aided by classic computing.

by MGemeny＠pgcps.org

SIMH, The Computer History Simulation Project, The HP2000 simulation, and the 8102 based Cosmac Elf Restoration provide NASA with valuable lessons learned, impacting the longevity planning which is expected to help insure the success of the mission to Pluto. As we indulge ourselves with our interest in classic or retro-computing we often find ourselves having to explain to family, friends, or co-workers why we have this interest. From time to time we have an opportunity make a positive impact on current or future technology. I believe this is one such example. Below is a link for a paper published by NASA, which chronicles the results, pitfalls and lessons learned form the successful resurrection of two computing systems from the 1970s, The Cosmac Elf, and the HP2000. The lessons learned from these two efforts had a significant impact on the longevity planning efforts for the New Horizons mission to Pluto, scheduled for launch tomorrow, Jan 17, 2006. http://descanso.jpl.nasa.gov/RCSGSO/Proceedings/Paper/A0053Paper.pdf As a side note, a Yahoo group has sprung up around the HP2000 simulation. It can be found at the following URL. http://groups.yahoo.com/group/hp2000family/ The Cosmac Elf Users Group can be found at: http://homepage.mac.com/ruske/cosmacelf/ The Computer History Simulation Project and SIMH can be found here: http://simh.trailing-edge.com/ Enjoy, Mike Gemeny

20 years, 7 months

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Thanks again, Dave!

by cclist＠sydex.com

On 1/15/2006 at 2:20 PM John Foust wrote: >Last one on eBay went for $60: 8747653996 . And yet the floppy tape cards, using the same chip, go begging. Go figure. Cheers, Chuck

20 years, 7 months

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AC power on front panels

by henk.gooijen＠oce.com

True, but my problem is space, who doesn't :-) so getting at the rear side to flip the breaker is just as cumbersome as pulling the plug at the wall. And I do not want to install the power controller at the front of the rack. And the EMI filter is indeed always connected, but Murphy ... - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Patrick Finnegan Verzonden: ma 16-01-2006 19:59 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: AC power on front panels On Monday 16 January 2006 04:09, Gooijen, Henk wrote: > > Some of my kit stays plugged in even when it's powered off. > > This tends to be stuff I'm pretty confident in, like the PDP-11. > > I always pull the plugs on my PDP-11s, because the small > transformer in the power controller is always connected. You could also just flip off the breaker on the power controller, which disconnects everything* in the PCU from the mains. Almost everything I keep plugged in 24x7 (short of light fixtures and one or two unimportant peecees) is also on a UPS. * Except for the EMI filter, inlet power cable, plug from the wall, etc. :) Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

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Speaking of Logic Analyzers...

by dholland＠woh.rr.com

Does anyone happen to have PDF's (User & Service) for a HP 1631D? I've enough bandwidth that getting them, or arranging a drop off point isn't an issue. thanks, David

20 years, 7 months

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Core overheating

by cclist＠sydex.com

On 1/16/2006 at 7:44 PM Philipp Hachtmann wrote: >What do you think? Do I have to be careful? I never thought I could >program my computer to death. >And such problems aren't mentioned in my programmers' guide and operation >manuals. IIRC, it was indeed a problem on the CDC 7600 PPU's. A very tight (e.g., UJN 0) loop would cause core to overheat. The 7600 added a duty-cycle integrator so that repeated accesses to the same location in a short amount of time would actually slow things down a bit to avoid that problem. But the 7600 was a very fast machine for its time. Cheers, Chuck

20 years, 7 months

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AC power on front panels

by henk.gooijen＠oce.com

> Some of my kit stays plugged in even when it's powered off. > This tends to be stuff I'm pretty confident in, like the PDP-11. I always pull the plugs on my PDP-11s, because the small transformer in the power controller is always connected. I once heard a story about a transformer that developed a short-circuit in a winding, and the thing got hot ... Actually, I don't pull the plugs. In my little museum it is too much hassle to get to the plugs on the wall behind the racks. I have six resettable 230VAC/16A. fuses which I turn off when I am not in the "computer room". - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

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Core overheating

by hachti＠hachti.de

Hi folks, when browsing the google news archive I found several references to "halt and catch fire" instructions on core memory based computers. The Honeywell minicomputers are also mentioned. The assumption is: If the processor gets into an indirect accessing loop on the same memory location (infinite) it will overheat the core and destroy it. What do you think? Do I have to be careful? I never thought I could program my computer to death. And such problems aren't mentioned in my programmers' guide and operation manuals. Btw all my core memory is ok... What's your opinion? Regards, Philipp

20 years, 7 months

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More Ebay madness

by williams.dan＠gmail.com

An Amiga 4000 for ?1400 8750494707 An RD53 for ?125 (not including vat) 8750544866 Dan

20 years, 7 months

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OT: Video Game list

by charlesmorris＠direcway.com

I have thirteen functioning arcade games in my basement. Not completely OT since they all date from the 1980's and have at least one 8-bit microprocessor in each :) Anyway, try "RGVAC" as it is commonly known (rec.games.video.arcade.collecting). Lots of help there, many posts by regulars, etc. I even got a T-shirt with a RGVAC logo there :) -Charles

20 years, 7 months

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Unknown Honeywell tape drive - Full disclosure!

by aek＠bitsavers.org

> * 200 bpi and 556 bpi resolution <-- !!! therefore, 7 tracks (800bpi is the lowest density 9-track)

20 years, 7 months

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0 0

RT11 boot block 0 words ?

by henk.gooijen＠oce.com

Thanks Jerome for this information. I did know what the WRITE PROT button does :-), but the fact that you can run RT-11 with that button ON was new to me, as long as you don't need to write to the pack, of course. Very handy if you make any copy from the system disk to an other disk. An error in the entry line (DL0 <-> DL1: swapped) will not be harmful to the system disk with the WRITE PROT button ON. I used your tip yesterday! I did notice however, that I became a little less "on guard", because I was thinking "I'am safe" :-) BTW, as you can guess, my problems with the RL drives that would not boot are solved. The drive(s), cables and the pack are all fine, the RL11 controller developed a fault. I have tagged the board with a label that describes the symptoms and put it aside ... for days when I have more time to do some fault finding on the board; when I'm retired :-). - Henk, PA8PDP. > Jerome Fine replies: > > Tony is correct. The boot block does start with 240 for the > RL02. If you know the approximate version of RT-11 and the > flavour of the monitor (RT11FB, RT11XM, etc.), most of the > rest of the boot block at block zero can be described. Of > course, if you did that, you also would have read the RL02 pack! > > One method of making sure that the RL02 pack is not changed > is to WRITE PROTECT the pack so that it can't be changed - > PERIOD! While some operating systems can't run, RT-11 is > PERFECTLY happy using this method of making sure that the > system disk (or any other for that matter) is not altered. > Of course, you also can't save any new files. BUT, you can > turn off the WRITE PROTECT at any time and save one file at a > time when you actually have something to save. NOTE that > RT-11 must also write first to the directory, so if you use > this method, best to use VM: and copy the file in one > operation using PIP after the file is complete. > > Sincerely yours, > > Jerome Fine This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

3
2
0 0

Unknown Honeywell tape drive - Help!

by hachti＠hachti.de

Hello everybody, I can get an old Honeywell type drive. But I know literally nothing about it. Not even the model number...! Here is a link to a few pictures I've received today: http://hachti.de/honeywell-tape/ All I know about it is that it has the colour and same switches style like my Honeywell H316 computer. Perhaps I could use them together? The tape was originally connected to a machine called H632. So I ask for every information known about this tape drive. Perhaps someone has software, schematics etc.? I would be grateful for every little piece of material/knowledge! Thank you very much, Philipp :-)

20 years, 7 months

4
9
0 0

seeking SGI Indigo2 Impact power supply

by cswiger＠widomaker.com

All - My SGI workstation (which I use to create stuff in Blender, altho the rendering is done elsewhere for speed ;) just emitted the smoke of life from it's power supply. I'm looking for SGI P/N 060-8002 or the stronger 060-0027 (Zytec p/n 22928805). The only sources I could find with Google are 1) out of stock or, 2) $700. TIA --Chuck

20 years, 7 months

2
1
0 0

Looking for DSSI ISE disk

by Useddec＠aol.com

Hi De, I have several drives and parts for these. Send me a wish list Thanks, Paul

20 years, 7 months

1
0
0 0

Missing CPMUG archives needed

by rcini＠optonline.net

All: I was searching my copy of the CPMUG archive for something and I discovered that I have a bad archive file and a few missing ones. I don't know if the missing ones actually exist, however. Here's what I'm missing and what's a bad ARK file. CPMUG040.ark is bad. I'm missing 039 and 055-077 (don't know if these exist). I tried the usual on-line places and looked in the WC_CDROM and these aren't there. Please contact off-list if you can help. Thanks. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

20 years, 7 months

1
0
0 0

Econet file server on Ebay

by williams.dan＠gmail.com

I'm sure someone here will want this 8750947781 No connection to seller. Dan

20 years, 7 months

1
0
0 0

Thanks again, Dave!

by zmerch＠30below.com

The good news: Dave Dunfield has made some changes/additions to ImageDisk (now version 1.09 and copyright 2006), so it's officially not an orphan. :-)) Whoohoo! Thanks, Dave! Now the bad news: I thought I could "cheat the system" by running ImageDisk on Windows 2000, as I have some Tu^H^HWordPerfect 6.1 disks I needed to try to image. Yes, Right there in program documentation it says it won't run on any Winders OS that uses good ol' HAL - that's the Hardware Abstraction Layer for y'all that run the "good" OS's. ;-) Well, I tried to run it in a Winders98 install under VirtualPC under Winders 2000. I was hoping that VirtualPC would open up the HAL enough on floppy access to allow ImageDisk to do it's job. Well, it still didn't work. It tried awfully hard, but the HAL just confused the bejeebers out of it. (At times, ID thought it was reading a Single Density disk!) This is *not* a dig on the program, I *knew* I was asking way more than I should at the beginning. I was *hoping* to have good news if someone wanted to run it on a newer M$ OS that didn't suck nearly so bad as WinME. I guess I'll have to dig my old smellyron (er, celeron) 533 system out of mothballs which runs 98 & install/run it on there. It's just that I'm a bit space-limited right now, and convincing the wife that I need room for a permanent CoCo setup *and* yet another IBM are slim (and at this rate, there's *no* chance for a little space for the Amiga 4000T in the near future... :-/ ). [[ Yes, I know there's a rawrite utility for NT. Yes, I've already tried it. Yes, I'm getting CRC errors. No, I'm not going to swap 12 floppy drives around hoping to get one that can read 'em... :-/ ]] Ah well, ya can't blame a guy fer trying, eh? ;-) Thanks again, Dave! Laterz, Roger "Merch" Merchberger -- Roger "Merch" Merchberger | "Profile, don't speculate." SysAdmin, Iceberg Computers | Daniel J. Bernstein zmerch at 30below.com |

20 years, 7 months

16
53
0 0

looking for DSSI ISE disk

by compoobah＠valleyimplants.com

The ISE is needed to mount the DSSI disk. VAX 4ks in the BA4(30/40) have a sled arrangement with a card edge connector bringing out power and DSSI. I've been looking for one for a while, and most of the E-Bay DSSI drives are stripped from the sleds (don't know why, I guess earlier MicroVAXen didn't use the sleds). The KZQSA will work in a pinch provided that you want to run VMS, none of the xBSDs offer support for it (ULTRIX doesn't even work well with it) Performance will likely leave something to be desired. I've seen docs for a HSD that mounts in the BA4x0 and allows for SCSI in the upper bay, but have not seen one in the flesh. I'm currently looking to wire a HSD05-AA SBB in mine, but it still looks like I need a sled or two for mechanical connections :(.

20 years, 7 months

1
0
0 0

This weekend

by ploopster＠gmail.com

I'm installing two laminated (doubled-up 2x12") beams and eight jack posts to hold up my dining room floor from underneath. I already installed one beam and four columns in December. Ah, the trials of being a mainframe collector. Peace... Sridhar

20 years, 7 months

11
29
0 0

Some questions about a Olivetti P6060

by dr.emiel＠xs4all.nl

I'm busy fixing a Olivetti P6060 but I'm stuck and do have some questions. Is there somebody who has a service manual or a schematic diagram of this computer or from a P6066 (same kind of machine). The computer is sometimes starting up with errors but I don't know what they mean, sometimes with just the busy-LED is blinking and no display at all. So I need desperatly some kind of technical paper about this machine... Regards Rik

20 years, 7 months

1
0
0 0

Stupid Mac Ethernet question

by pete＠dunnington.plus.com

On Jan 14 2006, 18:10, Richard A. Cini wrote: > I just recently upgraded the network cabling in my house to 5e > as part of some new construction, and I also upgraded the networking > components. Now, all of my normal machines run at 100 full duplex. Anyway. > The strangest thing happened to my Mac IIci - the Ethernet > connection no longer works. I don't even get a link light on the new switch > (a Cisco/Linksys switch). However, when I plug the Mac into a plain old 10BT > hub and then uplink it to the switch, I at least get a link light. > Does this problem resonate with anyone? Yes, it does. Check that the cable that came with the Mac is a straight-through Ethernet Cat 5 cable, not a crossover (pins 1+2 at one connected to pins 3+6 at the other; ie the orange and green pairs). It could also be an autonegotiation (speed/duplex) problem, but I'd check the cable anyway, becasue that's usually easy to do by eye. Sometimes Macs have been supplied with crossover cables which work fine on devices that have ports which autodetect crossover -- some hubs and switches do this to make interconnections easier. I once was on the receiving end of a rant from a visitor who had a crossover cable, though neither of us realised it immediately. I tested the socket, which was live and my Fluke OneTouch got a link and a DHCP lease. I connected it to his Mac; that showed a link. I tested his cable, which showed as a crossover. I told him that was the problem. Not withstanding the "Wiremap Error" displayed on the OneTouch, he insisted it was our network at fault, and "of course" his cable was the right type "because it works at home". I gave him a brand-new patch cable sealed in a polythene bag and left him to get over it. BTW, there is no colour code convention for patch cables, but we like to use a local system that helps to prevent most accidents and puzzlements: grey is temporary, purple is crossover, black is serial, and pink ("barbie-net") is telephony. Anything else is "Just Ethernet". It might be wise to adopt some similar convention, at least to distinguish crossover cables. -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

2
1
0 0

New find: RCA Studio II

by wizard1956＠yahoo.com

If you can please send the diagrams and the instruction set for the EPROM of the Studio II,this is something I have started to think abbout lateley. Thanks JOELJOHNSON Phil Clayton musicman38 at mindspring.com --------------------------------- Yahoo! Photos Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.

20 years, 7 months

1
0
0 0

KM11 replica

by ggs＠shiresoft.com

Hi, I just received my production version of the KM11 maintenance boards. Once I build one and test it, boards and kits will be available. Both will include a parts list and assembly instructions (kits will of course include all required parts). The boards have gold edge fingers, solder mask on both sides and a top silk screen. Here's a link to the prototypes: http://www.shiresoft.com/pdp-11/boards/index.html The difference between the prototypes and the production boards is that the prototypes were all gold plated and the production boards just have the edge fingers. The rest of the board is tinned. The bare board is $35 and the full kit is $85. -- TTFN - Guy

20 years, 7 months

5
6
0 0

looking for RX01 device IOTs for the PDP8/e

by henk.gooijen＠oce.com

Hi Tom, I did not check my copy of "Intro to Programming", because on an earlier search for a detailed description of the IOTs for a specific device (how it works and interacts with the pdp8), I remembered that the RX01 was not among them. I do have the description of the RK05 IOTs, but that is to big (capacity-wise) for a floppy disk. Perhaps I will someday have a go at it to simulate RK05 with a 100 Mb ZIP drive ... :-) Meanwhile, the link that Vince posted got me started: including the (standard a lot of) comment lines, the "#defines" and memory allocation, I have all IOTs coded in some 800 lines 6809 assembler. I guess that max 200 lines more will make it complete to put the RX01 in the simulator. As I did the DS32 and the RF08 simulation already, I have some experience in how to go about, and with the help of Vince, debugging was not too complicated (the interrupt mechanism got me puzzled for a while). thanks, - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Tom Peters Verzonden: zo 15-01-2006 03:39 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: RE: looking for RX01 device IOTs for the PDP8/e I have the PDP-8e Intro to Programming (1970). I'm not exactly sure what you're looking for. If you think it's in there, I'd be happy to look for you. However, all I see here are IOTs for TU58, drum disks, scopes, recording voltmeters, TTY's, and etc. Nothing that explicitly says RX01. At 10:55 AM 1/13/2006 +0100, you wrote: >Great! Thanks Vince. >IIRC, I have also gotten the IOTs for the RF08 from Dough's >site, (and the 'tricky' ones like GTF and RTF), but somehow >I did not see this RX01 page! >I have printed those pages already to study them! > >- Henk, PA8PDP. > > > > -----Original Message----- > > From: cctalk-bounces at classiccmp.org > > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of vrs > > Sent: vrijdag 13 januari 2006 10:40 > > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: looking for RX01 device IOTs for the PDP8/e > > > > From: "Gooijen, Henk" <henk.gooijen at oce.com> > > > Can anybody point me to where I can get the pdp8 RX01 IOT > > descriptions? > > > > Here's a place that I have used > > > > http://www.cs.uiowa.edu/~jones/pdp8/man/rx01.html > > > > It is easier (and harder) than you expect because the > > interface is to the bit-slice micro-controller in the drive, > > rather than to the bare drive electronics. > > > > Vince This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. = Thank you for your cooperation.

20 years, 7 months

1
0
0 0

SunOS tapes

by aek＠bitsavers.org

> ??http://www.pdpplanet.com/TemplateMain.aspx?contentId=7\ I would like to archive them, if they're still available.

20 years, 7 months

1
0
0 0

HP 1000 interface identification

by hachti＠hachti.de

Hi folks, does anybody know anything about this HP1000,21MX etc. card: Part No. 12665-60011, labeled "serial interface" I did not find any suitable information on bitsavers and don't know where to look. If anybody knows that card... Perhaps it is the standard serial interface/tty interface? Please help.... Thanks, Philipp

20 years, 7 months

4
3
0 0

OT: html/php help?

by news＠computercollector.com

Sorry to intrude with an OT question again. It's currently 1:15 AM EST -- is anyone out there awake and willing to help me debug a web page glitch? I've got free long-distance on my cell phone so some live support would be great. (I'm probably just doing something stupid on my page and overlooking it...) Please reply off-list -- thanks! ----------------------------------------- Evan Koblentz's personal homepage: http://www.snarc.net Computer Collector Newsletter: >> http://news.computercollector.com Mid-Atlantic Retro Computing Hobbyists & Museum: >> http://www.marchclub.org >> http://groups.yahoo.com/group/midatlanticretro/

20 years, 7 months

1
1
0 0

SunOS 68010 (Sun 1/2) distribution tapes

by ddl-cctech＠danlan.com

I have a number or original 68010 SunOS distribution tapes: 1.1 2.0 (tapes 1 and 2 of 3 only) 3.0 3.2 3.4 upgrade I will probably (if I have not already) archive the contents but does anyone want the media? If not I'm going to dump it. Dan Lanciani ddl at danlan.*com

20 years, 7 months

1
0
0 0

Looking for DSSI ISE disk

by drb＠msu.edu

Question for any Vax wizards hanging about: I just received a VAX 4000/600A in a BA400 rack mount chassis. It contains no disk. I'm having a little trouble sorting out part numbers and abbreviations online, but I think I'm looking for one or two RF72 or RF73 DSSI disks in ISE packages. If I'm barking up the wrong tree, cluestick whacks to tell me why this is a bad idea or impossible to find/maintain, or what I should try instead, would be appreciated. The box does have a KZQSA controller, but I like the neatness of the ISE modules. Thanks, De

20 years, 7 months

3
3
0 0

looking for RX01 device IOTs for the PDP8/e

by tpeters＠mixcom.com

I have the PDP-8e Intro to Programming (1970). I'm not exactly sure what you're looking for. If you think it's in there, I'd be happy to look for you. However, all I see here are IOTs for TU58, drum disks, scopes, recording voltmeters, TTY's, and etc. Nothing that explicitly says RX01. At 10:55 AM 1/13/2006 +0100, you wrote: >Great! Thanks Vince. >IIRC, I have also gotten the IOTs for the RF08 from Dough's >site, (and the 'tricky' ones like GTF and RTF), but somehow >I did not see this RX01 page! >I have printed those pages already to study them! > >- Henk, PA8PDP. > > > > -----Original Message----- > > From: cctalk-bounces at classiccmp.org > > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of vrs > > Sent: vrijdag 13 januari 2006 10:40 > > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: Re: looking for RX01 device IOTs for the PDP8/e > > > > From: "Gooijen, Henk" <henk.gooijen at oce.com> > > > Can anybody point me to where I can get the pdp8 RX01 IOT > > descriptions? > > > > Here's a place that I have used > > > > http://www.cs.uiowa.edu/~jones/pdp8/man/rx01.html > > > > It is easier (and harder) than you expect because the > > interface is to the bit-slice micro-controller in the drive, > > rather than to the bare drive electronics. > > > > Vince > >This message and attachment(s) are intended solely for the use of the >addressee and may contain information that is privileged, confidential or >otherwise exempt from disclosure under applicable law. >If you are not the intended recipient or agent thereof responsible for >delivering this message to the intended recipient, you are hereby notified >that any dissemination, distribution, or copying of this communication is >strictly prohibited. >If you have received this communication in error, please notify the sender >immediately by telephone and with a "reply" message. >Thank you for your cooperation. [Government]I don't make jokes. I just watch the government and report the facts. --Will Rogers --... ...-- -.. . -. ----. --.- --.- -... tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio) "HEY YOU" (loud shouting) WEB ADDRESS http//www.mixweb.com/tpeters 43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User 385531

20 years, 7 months

1
0
0 0

old computers

by ba600＠ncf.ca

On Saturday 14 January 2006 7:15 pm, Danna Ives wrote: > Hi! > > I am trying to get rid of an old computer I purchased back in 1989. It is > a Tandy 1000TL with a CM-11 color monitor and a DMP 300 Dot Matrix Printer > with some software, a hard plastic keyboard cover, a soft plastic monitor > cover, and the original boxes. All still work and I have never had any > service done on them. I am willing to donate it to anyone who will pay the > shipping or pick it up. Would you or anyone you know be interested? >From your email address it looks like you are a long ways away. I would recommend posting to cctalk at classiccmp.org. this is an International list with many members closer to your area. Mike -- Collector of vintage computers http://www.ncf.ca/~ba600 Machines to trade http://www.ncf.ca/~ba600/trade.html

20 years, 7 months

1
0
0 0

Stupid Mac Ethernet question

by rcini＠optonline.net

All: I just recently upgraded the network cabling in my house to 5e as part of some new construction, and I also upgraded the networking components. Now, all of my normal machines run at 100 full duplex. Anyway. The strangest thing happened to my Mac IIci - the Ethernet connection no longer works. I don't even get a link light on the new switch (a Cisco/Linksys switch). However, when I plug the Mac into a plain old 10BT hub and then uplink it to the switch, I at least get a link light. Nothing else works, though. The router doesn't show the Mac obtaining an IP address, and the ci doesn't see the AppleTalk zone that's on my NT Server box. In the previous configuration, everything went through a 24-port hub. Does this problem resonate with anyone? Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

20 years, 7 months

8
9
0 0

KM11 replica

by Useddec＠aol.com

I have one or two of these around here. I don't know which overlays I have, but if you need any of the info on them, I'll try to dig them up. Thanks, Paul

20 years, 7 months

1
0
0 0

Boolean LEGO logic

by toresbe＠ifi.uio.no

Fascinating! Wonder how one would design the RAM. What the world needs is a LEGO PDP-8! :) http://goldfish.ikaruga.co.uk/logic.html -toresbe :)

20 years, 7 months

2
1
0 0

HP Progress

by Tim＠Rikers.org

I spent last evening with a friend hacking on my HP-2112A. We got it up and running! Still no work on the peripherals. It does have a sticky bit that I've not yet tracked down, but I presume that's another bad connection someplace. At any rate, I got a simple delayed binary counter running that dumps to the S register. I powered up the 2108 as well running a chaser routine: http://rikers.org/hp2100/hp2108a2112a.avi Assembly sources are in that same directory if you are curious. http://rikers.org/hp2100/ One step closer to running ACCESS on real hardware. =) It looks like SIMH has IPL issues under Linux and probably other OSes. I can get ACCESS running in windows but not under Linux. I'll spend some time debugging that soon. I don't have the hardware for the IPL so I'll need that someday. I understand that I need 4 12566 cards and some custom cables. I bought a few cable ends from larry of ebay and I have these two cards: GND TRUE IN/OUT - 12566-8001, 12666-6001 907 22 +TRUE IN/OUT - 12566-8001, 12566-6002 907 22 But I only have 2. If anyone has others that they might want to trade boards for I might be interested. ;-) At some point I'll likely need the IOP firmware but I know Jay has it so I'm sure we can work something out there. Also need the breakout panel for my MUX set at somepoint. At least I need the edge connectors. They are the same size as the normal edge connector, but use a higher pin density. Leads welcome! Hardware pictures: http://rikers.org/hardware/ I'm often on #classiccmp on irc.freenode.net as TimRiker. Join us. ;-) -- Tim Riker - http://Rikers.org/ - TimR at Debian.org Embedded Linux Technologist - http://eLinux.org/ BZFlag maintainer - http://BZFlag.org/ - for fun!

20 years, 7 months

1
0
0 0

Suns available Madison, WI; SCSI 9-track wanted

by jfoust＠threedee.com

I have a lead on a Sun 3/50 workstation, dead Sun monitor, non-Sun working monitor, 2 SCSI boxes, keyboard, mouse, cables, etc., probably still working. And a Sun 3/260 floor model with monitor, 2'x2'x6' 9-track tape drive (Pertec interface), keyboard, mouse. They're located in Madison, WI. Free for the hauling. Due to size and weight, I may need to pass on these. If you're interested, I can point you to the owners. I'm also hunting for a table-top 9-track reader, SCSI. I need to read a dozen or two tapes and move the data to conventional media. - John

20 years, 7 months

2
2
0 0

Biography of John Simmons

by david＠cantrell.org.uk

Today's "Life of the Day" from the Oxford Dictionary of National Biography is John Simmons, who was instrumental in the creation of the LEO I computer by Lyons, which was the first computer to be used for automating tedious office jobs. http://www.oxforddnb.com/public/lotw/1.html -- David Cantrell | top google result for "topless karaoke murders" You know you're getting old when you fancy the teenager's parent and ignore the teenager -- Paul M in uknot

20 years, 7 months

2
1
0 0

AC power on front panels

by henk.gooijen＠oce.com

Use a Solid State Relay with the proper rating at the AC switching side, and operating on low-voltage DC at the input side. Nice to have is a SSR which switches the load at AC voltage zero-crossing. If you install the SSR at the rear side, you can keep the AC power leads very short between the inlet, SSR, and the power transformer. Now, you need a DC source, which is switched to the SSR input from the console front side. Most SSRs operate at the input range of 3 - 32V, so either install 3 NiCaDs, or install a small transformer with a bridge rectifier and an electrolytic capacitor to smooth the DC. If you go for the second choice, get a good quality transformer as it might be powered always. If you go for the NiCaDs, you might consider a simple loader that recharges the NiCaDs when the AC power is on the main transformer (unit switched ON). - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard A. Cini Verzonden: za 14-01-2006 05:23 Aan: CCTalk Onderwerp: AC power on front panels I'm playing around with my relatively new IMSAI and I was pondering the following. The unit is constructed with the front panel power switch unconnected and the corresponding terminals on the power supply board jumpered together. There is a mains switch on the rear panel which takes the place of the front panel switch. While for safety reasons I cannot disagree with the approach - it's plain stupid to put uninsulated mains voltage in a low-voltage area (and unpassable by UL evaluators I'm sure) - it detracts a bit from its use because you have to reach behind the unit to turn it on. Has anyone come up with an elegant solution to being able to use the front panel power switch while keeping it safe? I was toying with some sort of low-voltage circuit (small LV transformer and relay, with the front panel switch in the loop on the coil side). Another idea I had was to hot glue a dielectric insulator board (that gray cardboard kind of stuff) over the parts of the front panel that would be exposed. Ideas? Too much time on my hands? Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/ This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

1
0
0 0

Available for pickup.

by ajp166＠bellatlantic.net

I take it that I can notify the owner that these systems are of no interest to anyone here. I cant take them, too much and too big. Allison > >Subject: Available for pickup. > From: Allison <ajp166 at bellatlantic.net> > Date: Mon, 26 Sep 2005 18:42:52 -0400 > To: cctalk at classiccmp.org > > >I do not hold these but I've been asked if I want them. > >Allison > > >>I sent this earlier to arrl.org, but I thought I would also try here. These >>are free to the first taker, but that may be the rubbish man ! >>Apollo 400 >>Apollo 715s/50 >>Apollo 715t/50 >>(2) Apollo 715/64 >>Apollo 400 > >

20 years, 7 months

13
19
0 0

Quick favor needed -- re: fanfold paper

by news＠computercollector.com

I need someone to make a hi-res scan of a single sheet of 8.5x11 fanfold paper with the perforated side holes still attached. I'm making a graphic image for a web page background, but without having a sheet handy, it's hard to gauge the proportions of where the holes should be. Oh, and I need it five minutes ago. :) Thanks! ----------------------------------------- Evan Koblentz's personal homepage: http://www.snarc.net Computer Collector Newsletter: >> http://news.computercollector.com Mid-Atlantic Retro Computing Hobbyists & Museum: >> http://www.marchclub.org >> http://groups.yahoo.com/group/midatlanticretro/

20 years, 7 months

2
1
0 0

AC power on front panels

by leeeedavison＠yahoo.co.uk

> Has anyone come up with an elegant solution to being able to > use the front panel power switch while keeping it safe? Can't you sleve it as is done with the power switch on an AT power supply? Lee. .. ___________________________________________________________ To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com

20 years, 7 months

1
0
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This weekend

by brian＠quarterbyte.com

> Time to go rent an abandoned car factory I would think. Or an abandoned biscuit factory :) Norm Aleks and my 4331 system is at the Sunshine Biscuit Factory in Oakland, CA, in a room that used to be used to store Cheeze-Its dough. Brian

20 years, 7 months

1
0
0 0

cleaning keyboards in the dishwasher

by dwight.elvey＠amd.com

>From: "Chuck Guzis" <cclist at sydex.com> > >On 1/13/2006 at 2:15 PM Dwight Elvey wrote: > >>Hi >> For these things, it really depends on the flux used. You need >>to be using a higher temperature flux. >>Dwight > >I'm using a hydrochloric acid-ammonium fluoride liquid flux, which ought to >do, no? > >Cheers, >Chuck > Hi Chuck I'm not sure, not being an expert, but your problem sounds like an issue of the flux not holding up to the temperature. You should check with the manufacture of the solder to find what they recommend. Also, sometimes welding supplies will have some info as well. If the flux burns off too soon, it won't do any good. The instant the surface oxides, the solder stops flowing. Dwight

20 years, 7 months

2
1
0 0

cleaning keyboards in the dishwasher

by dwight.elvey＠amd.com

>From: "Chuck Guzis" <cclist at sydex.com> > >On 1/13/2006 at 2:05 PM Sridhar Ayengar wrote: > >>Bismuth-tin solder with high-temperature soldering gear works well >>enough, doesn't it? > >Not really--"high temperature" is relative in this case. I use an >acetylene-air torch for soft-soldering; many use oxyacetylene (you're >dealing with a big hunk of metal and local heating is more improtant that >getting the entire part hot). The problem is that joints are of the >plumbing sort--you depend on capillary action to form the joint and fill >any small gaps. Eutectic Sn/Pb is ideal. The substitutes, including some >rather expensive indium alloys that I've tried, just don't flow the same >way. > >I don't know of any plumber who perfers lead-free solder to the leaded >kind. Hi For these things, it really depends on the flux used. You need to be using a higher temperature flux. Dwight

20 years, 7 months

2
1
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System 3 Microfiche (maybe) on ePay

by jwstephens＠msm.umr.edu

I think this listing may be of interest to collectors of old IBM stuff. I don't think the seller has the slightest idea what the fiche document, and they copied the term "System 3" into the listing like they were clueless. Any system 3 people may want to pounce. 7736615631 Jim

20 years, 7 months

2
1
0 0

RL02 write faults, fixed it! Another cable mistake

by henk.gooijen＠oce.com

> [snip - very instructive part] > > However, I now know much more about RL drives than I care to, and > can fix the logic if it ever really does fail :) > > -Charles Yes, working your way through the schematics, actually measuring the signals, makes you "learn" how something works - in detail! I know a little more about the M7859 11/34 console than I did, say 2 months ago ... - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

17
32
0 0

Hard drive carriers

by elf＠ucsd.edu

Hello all, Regarding the recent talk about using hard drive carriers (in order to reduce the number of machines in your environment, etc.), has me wanting to invest in a few. Is there a specific brand anyone uses? I have one drive carrier I purchased years ago (at a local mom & pop computer store for something like $15) -- a cheap, no-name brand (can't even find a brand name on it). The drive connector in the tray is flimsy, it is a pain in the a** to get the drive in and out of the tray, and it just generally doesn't give me a real cozy feeling of sturdiness when using it. So I ask, are there specific brands of these carriers people use? Where do y'all purchase them? Regards, -Eric

20 years, 7 months

4
6
0 0

Non-random numbers (SIMH PDP-8)?

by charlesmorris＠direcway.com

I was playing blackjack (BASIC program) on SIMH with my OS/8 RL02 image. I noticed that every time I played the game the cards drawn were identical, both by the dealer and myself! A loop to print RND(0) ten times always shows the same ten numbers... doesn't sound very random to me :) Is this an artifact of SIMH, or BASIC? (Will it go away when I run the program on the real 8/A)? thanks Charles

20 years, 7 months

3
4
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cleaning keyboards in the dishwasher

by pete＠dunnington.plus.com

On Jan 9 2006, 13:05, James Fogg wrote: > Something in powdered detergents would "sandblast" the previously shiny > surface of the soft plastic handles of our Revereware pots. Liquid > detergents don't cause this problem. I don't think it's silicon dioxide, though. I've often seen the effect you describe; it seems to happen when the wash cycle is hot and I think it's mainly the harshness of the detergent. -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

7
16
0 0

Altos 386/1000 - anyone got install media?

by nsainz＠grupogalo.com.mx

We are looking for Altos 386/1000 and Altos 486/1000 computers. Do you know of anyone who has them? Nicol?s S?inz Phone: +52 (844) 438-7225 Fax: +52 (844) 412-1595

20 years, 7 months

2
1
0 0

cleaning keyboards in the dishwasher

by dwight.elvey＠amd.com

>From: "C Fernandez" <fernande at internet1.net> > >Sridhar Ayengar wrote: >> Yeah. I believe that the point was that many organomercuric compounds >> are significantly more toxic than metallic mercury alone. The canonical >> example is usually dimethylmercury. It killed a well known chemistry >> professor in 1997 when she spilled just two drops on her latex glove. >> Metallic mercury isn't *nearly that toxic*. >> >> Peace... Sridhar > >Yup, read about that just last night. > >Chad Fernandez >Michigan, USA Hi Botulism toxin has nothing in it that isn't already in our bodies but a tiny fraction of a drop would kill hundreds. I used to play with balls of metalic mercury on my bare hands ( it hasn't effected me much other than the urge to collect old computers ). Like most things, it isn't the parts that kill you it is the hold thing. Dwight

20 years, 7 months

1
0
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Fw: vax equipment for sale (and HP)

by jwest＠classiccmp.org

Contact original author, not me.... ----- Original Message ----- From: "Mike Myers" <MMyers at lothexperts.com> To: <jwest at classiccmp.org> Sent: Wednesday, December 14, 2005 9:01 AM Subject: vax equipment for sale I am writing you to see if yourself or someone you might know in the hobby world of vax might have a need for some surpluse equipment I have. Here is the list DEC Server 5000 with 4 FR-DECBA-CA 4.3 gig drives Dual Processor Card with two mem chips in each DEC AlphaServer 1000 4/266 with 1 RZ-r240-va 9.1g drive, 1 rz-28m-va 2.1g drive 1rz29b-va 4.3g drive and 10 mem slots filled DEC prioris ZX 5166mp/2 with 3 RZ28D-VW 2.0g drives Dual Processor board, 10 mem slots filled DEC Prioris HX 6000 with 3 FR-PCWVR-AZ 4g drives and 2 FR-PCWVR-AY 2g drives, dual processors and 4 mem slots filled All the above servers have SCSI Arrey cards, CD-Rom, Floppy and Dat drives HP 9000 800/H60 back of unit says upgraded to A2986A G60 in nice rack with two C3032R Drive Inclosures (2) 802.3 Lan Cards (1) Mux Card (2) HP-PB 16bit Diffrential SCSI Cards (4) Harddrives in Main Unit (3) drives each in the C3032R Inclosures (6) 32meg Mem Chips Installed Misc: (2) DEC Vaxstations 3100 M48 3 drives and max memory (i think) (1) DEC Vaxstation 3100 M38 3 Drives and Max memory (no Keyboard or monitors for above) TZ867 DLT Drive HP 20XT Optical Disk library Compaq DLT Library unit Rack mount P/N C5173L Series 4120

20 years, 7 months

2
1
0 0

hp 6286a supply

by brad＠heeltoe.com

Hi I've got an old HP 6286a bench supply. It's been sitting for a while and I turned it on and discovered it seems to have no voltage regulation - it gives out about 23VDC not matter what. The current regulation seems to work however. Anyone ever look inside of one of these? It looks like a nice supply and I hate to toss it. -brad

20 years, 7 months

1
0
0 0

KM11 replica

by henk.gooijen＠oce.com

Hello Guy, can you tell what type of switches those 4 are (2- or 3-position, or momentary spring-loaded)? And which types the 6 ICs are? - Henk, PA8PDP. > -----Original Message----- > From: cctalk-bounces at classiccmp.org > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Guy Sotomayor > Sent: vrijdag 13 januari 2006 3:24 > To: PDP11 list > Cc: cctech at classiccmp.org > Subject: KM11 replica > > Hi, > > I just received my production version of the KM11 maintenance boards. > Once I build one and test it, boards and kits will be available. > Both will include a parts list and assembly instructions (kits will > of course include all required parts). The boards have gold edge > fingers, solder mask on both sides and a top silk screen. > Here's a link to the prototypes: > http://www.shiresoft.com/pdp-11/boards/index.html > The difference between the prototypes and the production boards is > that the prototypes were all gold plated and the production boards > just have the edge fingers. The rest of the board is tinned. > > The bare board is $35 and the full kit is $85. > -- > TTFN - Guy This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

1
0
0 0

looking for RX01 device IOTs for the PDP8/e

by henk.gooijen＠oce.com

Great! Thanks Vince. IIRC, I have also gotten the IOTs for the RF08 from Dough's site, (and the 'tricky' ones like GTF and RTF), but somehow I did not see this RX01 page! I have printed those pages already to study them! - Henk, PA8PDP. > -----Original Message----- > From: cctalk-bounces at classiccmp.org > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of vrs > Sent: vrijdag 13 januari 2006 10:40 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: looking for RX01 device IOTs for the PDP8/e > > From: "Gooijen, Henk" <henk.gooijen at oce.com> > > Can anybody point me to where I can get the pdp8 RX01 IOT > descriptions? > > Here's a place that I have used > > http://www.cs.uiowa.edu/~jones/pdp8/man/rx01.html > > It is easier (and harder) than you expect because the > interface is to the bit-slice micro-controller in the drive, > rather than to the bare drive electronics. > > Vince This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

1
0
0 0

looking for RX01 device IOTs for the PDP8/e

by henk.gooijen＠oce.com

Hi all, I finished the tests of the DOS for the CoreSYS 6809 with the 2793 FDC extension board, and I figured that it would be nice if I can add that floppy disk drive to the pdp8/e simulator that runs on the 6809! See www.pdp-11.nl/homebrew/floppy/diskstartpage.html (at the end). I will of course not be needing 'my' DOS (except the read/write sector routines) as OS/8 will handle the file system for me. However, I need the description of the (pdp8) IOTs for the RX01 device to implement the floppy disk in the simulation. I have not been able to find that on the web, so I don't even know how difficult implementing those IOTs will be. For example, the real disk sector size is just 128 bytes, which would mean (in pdp8 emulation) that the 'virtual' sector size is 64 words. It is likely that I need some disk access translation to read/write data, but the IOT descriptions will (hopefully) make that clear. Can anybody point me to where I can get the pdp8 RX01 IOT descriptions? thanks, - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 7 months

2
1
0 0

Pertec interface

by cheri-post＠web.de

> OK, I found a diagram and parts number in the M244X PDF: > <http://www.xmission.com/~legalize/vintage/fujitsu/M2444-power-cord.png> > > Most power cords are a rectangle with a triangular hat and this one was > a round plug, with what looks like a screw-on ring for strain relief. > Is this something fairly standard that I could find? > > I mean, its just a power cord. I can always strip the standard > connector of a standard cord and solder it into the inside of the > unit, but it would be nice to have a cord that just plugged into it. Well, my M2444AC came the the same power plug you're describing. These round screwable plugs are definitely not standard ones. When I found out that a connector (without soldered cable) for that plug would cost around 30 EUR (35$), I just changed this special plug into a standard one with a littre bit of soldering. Regards, Pierre ______________________________________________________________________ XXL-Speicher, PC-Virenschutz, Spartarife & mehr: Nur im WEB.DE Club! Jetzt gratis testen! http://freemail.web.de/home/landingpad/?mc=021130

20 years, 7 months

1
0
0 0

Fw: Some old PDP-11

by jwest＠classiccmp.org

Contact original author, not me.... Jay ----- Original Message ----- From: "Brandy" <brandy45108 at comcast.net> To: <jwest at classiccmp.org> Sent: Tuesday, December 13, 2005 2:31 PM Subject: Some old PDP-11 > Hi, > > I have some old PDP-11 stuff that is finally time to for me to get rid of. > > A short list: > > * Micro PDP-11/23 cpu board > * Micro PDP-11/70 cpu board > * 1 Mega-byte memory board > * H-19 terminal > * Wyse 75 terminal > * LA-xx dot matrix printer > * Diablo xx daisy wheel printer > * RL xx disk emulator > * Chassis with two 10 megabyte hard disks > * RT11 and TSX11 software > * Dual 8" floppy drive. > * Q-Bus backplane in chassis. > > There is more lot's book's manual's etc. Condition of all equipmet is > unknown as none has been powered up in many years. > > Is any one interested? > > Dennis Brandenburg > California, zip code 94043 > > >

20 years, 7 months

1
0
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pdp gear available

by jwest＠classiccmp.org

Contact original author, not me.... ------------- PDP-11/23 and 73 (some) VT-220 (some) VT-240 (lots) LA-12D (lots) Looking for a new home. All items in very good conditions. Svein-Erik Olsen solsen at mil.no

20 years, 7 months

1
0
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Yes, I'm alive.

by jwest＠classiccmp.org

Just wanted to poke my head out and say "yes, I'm still alive". Wife had last (hopefully) surgery thursday and came home sunday. Now I'm a full time care-giver for the next couple months (much like the previous couple months). Once this has passed, I'll be back here regularly. My apologies to all for many unanswered emails, due to all the above something had to give for a while and it was classiccmp. If someone needs me, best to email me directly for a while. Don't get too off-topic-happy, moderators are watching ;) I have had many people wanting to give away gear, I will post those to the list momentarily. Today I was given the following by a friend of a friend... he dropped it off and all so I had to make room for it. Three Northstar Horizon systems, complete with wood trim, boxes of Northstar docs & disks. They all appear to be in very good condition. Also got two Hazeltine 1420 terminals with dustcovers in mint condition. Guess some day I get to learn about S-100 stuff and CPM :) Back to your regularly scheduled programming.... Jay West

20 years, 7 months

1
0
0 0

Pertec interface

by legalize＠xmission.com

OK, so I found the Pertec stuff on bitsavers, but I haven't read through their docs yet. I purchased a Fujitsu 2444 tape drive that has a Pertec interface. ($0.99 on ebay with local pickup!) Apparently all the newer tape drives have Pertec + SCSI or just SCSI. Is Pertec similar enough to SCSI that I could rig up a dongle? If not, how hard is it to find a Pertec interface for: - VAXserver 4000 - PDP-11 Q-bus - Sun 3 w/expansion chassis - PCI/ISA So that I could get the drive into a usable state? I found a place that had Pertec interfaces for ISA based systems, but it would not work with Windows 2000 or later OS, the cards were out of stock and were pretty pricey (like $500+). So what would y'all recommend as the easiest/cheapest way to get this baby up and running? Also -- the power cord has a non-standard 3-prong plug. I'll try to get photos of this up somewhere for reference, but perhaps someone knows the kind of cord this thing needs so I can know what to look for? Fujitsu M244X Streaming Tape Drive Customer Engineering Manual <http://www.bitsavers.org/pdf/fujitsu/B03P-5325-0100A_244X_Jun87.pdf> Pertec <http://www.bitsavers.org/pdf/pertec/> -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years, 7 months

6
13
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Looking for an Altos 1000 386 or 486

by nsainz＠grupogalo.com.mx

Hi Do you know who has an Altos 1000 386 or 486 for sale? Nicolas Sainz

20 years, 7 months

1
0
0 0

IBM DASD and Unit Record equipment on eBay

by v.slyngstad＠verizon.net

Hi, I see that gold-snipper has listed a pile of old IBM unit-record and DASD equipment on eBay. (The category is Vintage Computing Products => IBM.) The prices are not low, but then again it is working stuff, not scrap. Looks like he's got a 4381 and all the trimmings. Vince (I'm not him, and I don't collect mainframe equipment, so you probably now know more about it than I do.)

20 years, 7 months

6
10
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Slightly OT: Bastard plagiarists

by charlesmorris＠direcway.com

Maybe you need to contact this guy: http://www.othercinema.com/otherzine/otherzine4/auction.html :) -Charles

20 years, 7 months

1
0
0 0

Looking for an Altos 1000

by nsainz＠grupogalo.com.mx

We are looking for an Altos 1000 Series Computer with 386 or 486 Processor, and parts too. Nicol?s S?inz Mier Gerente de Sistemas GRUPO GALO Saltillo, Coahuila MEXICO Phone. +52 (844) 438-7225 Fax +52 (844) 412-1595

20 years, 7 months

1
0
0 0

FW: ALERT: Login Request

by legalize＠xmission.com

Woo hoo! I have an account on Paul Allen's PDP-10 and Toad-1. This is fun1 -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years, 7 months

1
0
0 0

Looking for rack slides

by charlesmorris＠direcway.com

Would anyone have a set of rack slides for the 11/24? The ones for this huge box (BA-11A) appear to have some kind of pivot as well as the usual slide mechanism. thanks Charles

20 years, 7 months

2
1
0 0

HP Palmtop Webserver

by r_a_feldman＠hotmail.com

Michel Bel, based in the Netherlands and one of a few people offering HP 200LX palmtop parts and repairs, has put his web site onto an HP 200-based server. The 200LX, which first came out in 1994, has an 80186 processor (overclocked to 25mHz) and uses MS-DOS 5. The site has good response speed -- it is interesting what can be done with minimal hardware. The URL is: http://ip545193fb.direct-adsl.nl/ Bob

20 years, 7 months

1
0
0 0

trying to design my first micro- looking for "prior art" (6100and6809)

by compoobah＠valleyimplants.com

Sounds like I'm back with 6809 as being easier to work with. I'll sit down with what I've got here and see what I can come up with (I'm more interested in designing than just having a "soldering skills test"). Scott

20 years, 7 months

10
12
0 0

uIP TCP/IP stack for MSDOS

by jba＠sdf.lonestar.org

Hey everyone! I finally got around to posting my port of the uIP TCP/IP stack to MSDOS systems with FOSSIL serial drivers. I completed this port a while back for display at VCF Midwest 1.0. I've updated some of the source code to contain the necessary copyrights, and I've made it available on my webpage: http://jba.freeshell.org/uip.html This port of the stack contains only a web server that can be run through a SLIP connection. The software was only tested on a DEC Rainbow 100, but it makes no hardware calls, instead relying on the FOSSIL driver for serial access. It should run on any MSDOS-compatible OS with a FOSSIL driver in place, including some of the more exotic systems. I do plan on updating the port to work with uIP 0.9, the current version of the uIP TCP/IP stack. After the upgrade, it should work with more clients and servers. I hope this is moderately helpful or at least interesting to some! -Jeff Armstrong jba at sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org

20 years, 7 months

1
0
0 0

IBM DASD and Unit Record equipment on eBay

by brian＠quarterbyte.com

Norm and I are looking at getting the CPU. We got a virtually identical setup of all the other stuff this spring, but with a 4331 CPU. The 4381 is a lot better. If anyone else is hot to get the CPU let me know so we don't get into a tussle over it :) Brian

20 years, 7 months

1
0
0 0

Non-random numbers (SIMH PDP-8)?

by bqt＠update.uu.se

Eric J Korpela <korpela at ssl.berkeley.edu> wrote: > Some BASICs used RND(0) to get the previous random number and RND(1) > to generate a new number. Some used the reverse... Others used > RND(N) to generate a number between 0 and N. > > I think most DEC basics used RND(1) to generate a new number (except > for VAX basic, which, IIRC just used a pseudovariable called RND to > generate random numbers). BASIC+2 (on the PDP-11): .help/bp2 fun buil rnd The RND function returns a random number greater than or equal to zero and less than one. Format real-vbl = RND Example 990 R_num = RND .help/bp2 sta random The RANDOMIZE statement gives the random number function, RND, a new starting point. Format { RANDOMIZE } { RANDOM } Example 45 RANDOMIZE --- I know of other BASICs as well who used that convention. > Yep, just checked. RND(1) seems more typical. There are a few basic > dialects listed on my Ahl's simple benchmark page... I'd say it might be a bit hasty to say so. Many of those dialects you have there are really the same. Very many Micro computers used Microsofts BASIC. I wouldn't call that different dialects. Anyhow, I grabbed the VAX BASIC version and compiled it on a PPD-11 with RSX and BASIC+2. Here is the result: .run rand 340 iterations. .588235E-01 seconds per iteration Accuracy .685425E-01 Random 6.23425 Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

20 years, 7 months

1
0
0 0

Casio CFX-40

by pervilc＠yahoo.de

Hello Scott, do you have a Casio CFX-40 watch for sale? I?ve seen it in the internet that you have one. Thanks --------------------------------- Telefonieren Sie ohne weitere Kosten mit Ihren Freunden von PC zu PC! Jetzt Yahoo! Messenger installieren!

20 years, 7 months

1
0
0 0

Calcomp 1044

by legalize＠xmission.com

Wow.... opening bid was $100 and it was bid up to $500! I guess these old larger format pen plotters are still in demand! -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years, 7 months

1
0
0 0

cleaning keyboards in the dishwasher

by pete＠dunnington.plus.com

On Jan 10 2006, 15:40, Fred Cisin wrote: > I have a workroom that has a large sink with hot and cold water flow, a > parts washer made by Maytag, a big box made by Kenmore for chilling and > storing cold stuff, including a section that stays below 0 degrees c, a > box for heating stuff (thermostatic control up to about 500 degrees F) > made by Tappan, (heating and chilling stuff can make assembly a lot > easier) Good for baking stuff that's been spray-painted, too, and for drying plastic sheet prior to impact or thermoforming. Essential for polycarbonate and some types of Perspex. If it's the type with a fan, it's also good for the actual thermoforming, though you can also use your infrared heater for that. -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

2
1
0 0

Paul Allen opens PDP Planet web site

by r_a_feldman＠hotmail.com

There is a short article on the site at http://www.theregister.com/2006/01/10/allen_pdp/ The site is at http://www.pdpplanet.com/

20 years, 7 months

5
8
0 0

dovebid.com experiences?

by legalize＠xmission.com

Hi, does anyone have any experience with this online auction house? It looks like they mostly liquidate new equipment, but since the lots aren't listed until shortly before the auction opens, its hard to tell. Currently there's gobs of Sun E250 servers sitting at no bids with a minimum bid of $50 in Hayward, CA. -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years, 7 months

2
1
0 0

Doesn't *anyone* have those 11/24 switch settings?

by bqt＠update.uu.se

Charles <charlesmorris at direcway.com> wrote: > for the -YA revision-E M7133 CPU? > > I've searched everywhere on bitsavers & google. I also posted on > alt.sys.pdp11 and mailed the webmasters of several pdp-11 sites > directly... please help! Well, you didn't ask me... I have the system installation manual for the 11/24, but not where I'm sitting right now. I'm in digest mode, so I saw another header saying you already got it now, so I'm not hurrying on this, unless you send me another letter about it though. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

20 years, 7 months

1
0
0 0

Got 'em! Re: Doesn't *anyone* have those 11/24 switch settings?

by charlesmorris＠direcway.com

I don't know if he saw my message here or on alt.sys.pdp11, but I have just been sent (from the latest edition 11/24 tech manual) the relevant parts of Appendix D, "PDP-11/24 CPU Modifications". These three pages explain the "Value Engineering" (replacement of logic with gate array chips) redesign of the M7133 -YA version. Most importantly they contain the new switch/jumper settings and location. Thanks Ed! -Charles

20 years, 7 months

1
0
0 0

Calcomp 1044 plotter

by legalize＠xmission.com

Does anyone know any details on this or where a manual can be downloaded? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years, 7 months

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test-drb