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

Interesting machine on ebay UK

by williams.dan＠gmail.com

There is a Burroughs B21 working on ebay (8774469572). If it wasn't pickup only from Newcastle I'd grab it myself. dan

20 years, 6 months

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FDOS for Fluke 1720A

by aek＠bitsavers.org

> Does anyone have the O/S, Applications, and Diagnostice disks I'm trying to find this as well. Just picked up the manual set. It should be on bitsavers soon.

20 years, 6 months

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Fluke FDOS

by aek＠bitsavers.org

Kevin Schoedel said he had a copy as of Apr,2000 > On 2000/04/28 at 9:18pm -0500, Joe <rigdonj at intellistar.net> wrote: >> I picked up a second FLuke 1722 today. This one does have the keyboard >>(at last)! But I still haven't found the operating system software for it. >>Can anyone help? It uses Fluke's F-DOS. I'd also like to find a manual >>for it. > > I a Fluke 1720A with F-DOS. If there are grounds to believe that the same > software would work, I can try to do something about copying or archiving > the disks soon(er than I otherwise would). I might have multiple copies > already, though I seem to recall that only one was reliably readable. I > certainly do have multiple copies of the 1720A manuals.

20 years, 6 months

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VAX job - senior software engineer

by bpope＠wordstock.com

Maybe this will be of interest to someone here: http://newjersey.craigslist.org/sof/138336632.html - Expert knowledge of VAX VMS operating system and VAX System administration. and more.... Cheers, Bryan

20 years, 6 months

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Stuff on VCM

by marvin＠rain.org

I am finally starting to clean up stuff ... again, and most of the stuff is being listed on VCM, http://www.vintagecomputermarketplace.com/. If you feel the prices are way too low, let me know :). And ditto if you think they are too high. Mostly, I am culling back my collection of most things after about 1984 or so. I would love to have the time to play with the S-100 systems, get the Polymorphic and Lobo Drives stuff cataloged and working, etc. There are probably some things that got lost in email from the VCM over the past several months, so if I've forgotten or not responded to something purchased there several months ago, please let me know. I tend to forget to change some of the posts to "sold."

20 years, 6 months

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TRS-80 Model IIs available for pickup

by CCTalk＠catcorner.org

I have 2 to get rid of, with keyboard and external drive units. Pickup only (or you arrange for packing and shipping), North (and I mean north, none of that Newark/Edison stuff) New Jersey. I'm looking for a Model I, an MC-10, a DT-100, a PT-210, Model 2000, and just about everything else tandy related. Make a swap offer. Kelly

20 years, 6 months

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My pdp-8i problem

by cheri-post＠web.de

Wow Philippe, looking at your website, I got an impressive insight on the work you did to get this PDP 8/L up and running again. Keep on saving and repairing stuff! Regards, Pierre "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> schrieb am 05.03.06 12:53:14: > > Dear Tim, > > It is very hard to answer your question. I also spent hours fixing my > pdp-8/L, in which almost all circuits had to be repaired. It took me two > years. The only way : use a logic probe and have a set a spare flipchips > which you know are OK. I created a system to test the flipchips using a > digital acquisition card on a PC (see www.sonnet.be). Collect all possible > schematics, study them, have a confortable seat, stay calm and systematic > and use a card extender to have better access to all the lines. > Good luck, > > Philippe > > ----- Original Message ----- > From: "Tim" <tradde at excite.com> > To: <cctalk at classiccmp.org> > Sent: Saturday, February 18, 2006 11:30 PM > Subject: My pdp-8i problem > > > > > > I was hoping someone on this list might have some input on this. I have > > also posted this to alt.sys.pdp8. I have a pdp-8i with a memory problem. > > Here is the post from alt.sys.pdp8: > > > > Quite some time back while scoping out a problem I shorted a pin in my > > 8i backplane and lost memory control. Since that time Vince and I have > > been trying to figure out where the problem is to fix it. I don't know > > what pin I shorted as at the time I did not realize > > I had damaged anything. The +5v breaker tripped though. > > > > The problem is I can not deposit or read back any memory locations. > > The MB is displayed correctly on a deposit. Scoping signal has shown me a > > very odd signal on B FIELD 0 (1) when the machine is in run mode. It has > > a wave form on it rather than just a normal > > voltage. The oddest thing is the high point of the wave goes up to +6v > > with a bit of the beginning of the top portion going above +6v. To me > > this should not be. How can I get > > +6v from a system that is using +5v as it's input voltage? We have > > some theories but nothing concrete as yet. The other thing is if I remove > > all 3 G228s (A36, B36, B37) the > > signal goes away. I do not have parity memory so nothing is in A37. > > > > We believe there is a bad ground somewhere, but I have not been able to > > determine where. I do not have a wiring list so I may have to trace some > > signals manually. I think I have to find all the places the B30L1 (B FIELD > > 0(1)) goes to. > > > > Any ideas or suggestions from anyone? This has been bugging me for a > > long time. I look at it for awhile, and then put it down for awhile. It's > > also not easy to look at this in the location it is in. It's too low to > > kneel and really be comfortable. Too high to lay on my stomach. :) > > > > Thanks for any input on this. I should say that part of the system > > still works. Examining or depositing memory while it does not appear to > > load/store the data increments the PC > > as it should. I can sort of run, which was my original problem. It > > runs but stays at location zero. It is not an interrupt causing this. So > > the front panel is mostly operational > > so at least some of the machine is still working. I just have to find > > the problem with the memory. > > > > I know most people on this list do not have a pdp-8i, nor may know > > much if anything about them. Any suggestion will be taken and looked > > into if it seems to have hope of leading to a solution. Also I will > > answer any questions people have to help describe the problem more or > > give more details into what Vince and I have looked at. > > > > Tim Radde > > > > _______________________________________________ > > Join Excite! - http://www.excite.com > > The most personalized portal on the Web! > > > > > > > ______________________________________________________________________ XXL-Speicher, PC-Virenschutz, Spartarife & mehr: Nur im WEB.DE Club! Jetzt gratis testen! http://freemail.web.de/home/landingpad/?mc=021130

20 years, 6 months

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Help with VT320 - Is there a line 25 used as status?

by jhfinedp3k＠compsys.to

Hi All, I seem to remember that when I used a VT320 under VMS and EVE/TPU (or at least one of the DEC editors), there was status information on line 25 for the user. I think the file name under edit was displayed and perhaps even the line number and column number, although I really am doubtful about the latter. BUT I do seem to remember the file name being available on line 25. Am I correct? Please help! The VT220 was not able to support line 25 as far as I know, and certainly the VT100 was not able. What about the VT410 and VT520 terminals? Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

20 years, 6 months

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In need of Televideo 910 terminal case

by rcini＠optonline.net

All: I recently received from a friend a Televideo 910 terminal that seems to have been drop-kicked off of the back of the mail truck. It was dropped keyboard first, so the entire front broke off. So far, gluing the case isn't working well, and I'm not optimistic about the ultimate success. So, I'm looking for someone with a bad terminal with a good case so I can make a Frankenstein terminal. Please contact me off-list. 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, 6 months

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Details of old HP Stuff Available (act now!)

by andrew.f.brunet＠lmco.com

Hi, I'm looking of an HP monitor that you may have. HP35741A. Do you still have it ? Thx Andy

20 years, 6 months

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Commodore 64 story

by jwstephens＠msm.umr.edu

Those who haven't read the computerworld Sharktank for today, might want to. Funny as usual for that column, but more interesting here than usual. Jim

20 years, 6 months

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History Check -- First CMOS mainframe

by aek＠bitsavers.org

I'm not an expert >in the MCP O/S so have been in lurkmode on this for a >longnow while. >From what I've been able to tell, the thing executes a superset of the old 1107 instruction set. --- Wrong side of the merger. MCP was from the Burroughs side. Descendent of the 5500 family. Clearpath/OS2000 are the ones-compliment 11xx family.

20 years, 6 months

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looking to buy/swap/extort PC Tech Journal magazines

by chrism3667＠yahoo.com

what a boring magazine. It really is a dull read. Not sure why I want to add to my accumulation (have 16 between 1/85 - 12/87). But alas I am. Let me know even if yer just looking for an article or two. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

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an odd PC seen in a thrift store (?)

by chrism3667＠yahoo.com

the 9801 was not an all in one though. I cant imagine myself confusing NEC and NCR actually, just that I was somewhat familiar with their PC4s, and it seemed a tad different IIRC. It could have been the Decision Mate, which doesnt look any different, and would also boot to a cpm a> prompt (Im thinking so anyway). The thing just somehow looked different...(I was hoping some nerd who also used to shop their might subscribe to this list). --- cctech-bounces at classiccmp.org <Tim at Rikers.org> wrote: > Chris M wrote: > > the talk of a peculiar USR pc made me remember this. > > There used to be a (primarily) electronic junk store > > in LI called Eldies (Edlies?) on Hempstead Tnpk in > > Levittown I guess. Sitting there one day was an all in > > one, IIRC, NCR unit that booted up to an a:> prompt. > > It struck me as a weirdish dos semi compatible. It > > didnt strike me as a PC4 or the nearly identical > > Decision Mate (cpm). Pretty sure it was NCR, but eh > > maybe it was NEC (definately NOT an APC, not quite > > that big and heavy). Anyone have a clue? > > The Japanese NEC PC-9800 series booted with A: as the boot drive even if > it booted off a hard disk. the floppies would become the next drives. > > Was the text in japanese? > > I did software development on some of these models back around 1990. All > the M$ tools were available for them, but only from Japanese dealers and > only in Japanese. > > -- > Tim Riker - http://Rikers.org/ - TimR at Debian.org > Embedded Linux Technologist - http://eLinux.org/ > BZFlag maintainer - http://BZFlag.org/ - for fun! __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

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Heath ET-3400 Trainer Simulator SW

by cleve_001＠yahoo.com

Hi, Did you every find Trainer.zip? If not I have attached it. Cleve __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

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TF20 Notes

by fjkraan＠xs4all.nl

> made. One other thing that might be of interest : The 34 pin connector on > the back of the TF20 is not some kind of parallel host interface. It's > exactly what you'd expect a 34 pin connector on a disk controller to be > -- namely a SA400-compatible disk drive bus. The hardware can handle up > If the processor board is left out of the TF-20 you could use the drives as extra drives on a QX-10. Some more info on the TF-20 and HX-20 Disk basic can be learned from the User manual: http://electrickery.xs4all.nl/comp/tf20/doc/tf-20_manual.pdf or http://oldcomputers.dyndns.org/public/pub/rechner/epson/~fjkraan/comp/tf20/…. The CP/M like OS in the TF-20 probably doesn't support the extra drives as the official way to connect more drives is daisy chaining another TF-20 to the first one. Fred Jan

20 years, 6 months

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OT Tom Swift (was: Re: Where's this from?)

by stimpy.u.idiot＠gmail.com

On 05/03/06, Zane H. Healy <healyzh at aracnet.com> wrote: > > At 12:31 PM +0000 3/5/06, Philip Pemberton wrote: > >In message <20060304205928.017C8BA48B5 at mini-me.trailing-edge.com> > > shoppa_classiccmp at trailing-edge.com (Tim Shoppa) wrote: > > >Tom Swift? Never heard of 'em... It's either way before my time, or one > of > >the many things that never managed to get across the Atlantic... > > It probably never made it across the Atlantic. They did, I remember reading several of them from our primary school library in the mid 70's, I suppose I would have been 8 or 9. All I can remember now is he had a very cool submarine/helicopter contraption that could fly at humoungous speed and that the style, with hindsight, was E.E Smith gung-ho for a junior audience. -- Pete Edwards "Prediction is very difficult, especially if it's about the future" - Niels Bohr

20 years, 6 months

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Where's this from?

by vp＠cs.drexel.edu

Philip Pemberton <philpem at dsl.pipex.com> wrote: > Tom Swift? Never heard of 'em... It's either way before my time, or one of > the many things that never managed to get across the Atlantic... actually they did, look at http://www.tomswift.info/homepage/british.html for the British version of the Tom Swift books (published by Collins). **vp

20 years, 6 months

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HP cables

by drb＠msu.edu

Dear all, Trying to identify a box of HP cables. There are two types. One has a 50-pin centronics-style connector at one end, and a 50-pin Winchester MRAC rack-and-panel connector at the other. The other type has Winchesters at both ends. They're about 4-5 feet in length. All seem to have an metal band with the number "5060 2310". Some have HP "inspected by 7452" cards tied to them, dated 6/69. A couple have factory vinyl or poly bags. Anyone know what devices these connect? Thanks, De

20 years, 6 months

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History Check -- First CMOS mainframe

by cclist＠sydex.com

On my wandering around, I found the following claims on the Unisys "history" web page (http://www.unisys.com/about__unisys/history/index.htm): "1993 Unisys introduces 2200/500, the first mainframe based on complementary metal oxide semiconductor (CMOS) technology." Wasn't the ETA-10 CMOS-based? (Not to mention the whole subject of "What's a mainframe?") "1989 Unisys introduces Micro A, the first desktop, single-chip mainframe." I don't know what to make of that claim. What's a mainframe. From what I can gather, the Micro A was pretty much a plug-in coprocessor PCB in an otherwise x86 box that booted OS/2. Comments? Anyone on the list a Blue Bell veteran who can give the real scoop on the Micro A? Cheers, Chuck

20 years, 6 months

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Dimension 68000

by chrism3667＠yahoo.com

a vintage cohort has supplied me with a stack of floppies for this unit. With all deference to Dave and his software, would ImageDisk be the best tool for the job? Stated another way, would these disks require any special handling? Theyre quad density 800k, or single sided 400k (methinks). Possibly readable by DOS (a guess, and not a crazy one if youre familiar with the machine), in which case my concerns are unfounded. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

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PDP-11 Integer Divide Instruction "Div", To: General Discussion: On-Topic and Off-Topic Post

by bqt＠update.uu.se

"Jerome H. Fine" <jhfinedp3k at compsys.to> wrote: > Hi All, > > I have noticed what may be an interesting result when I use the > PDP-11 Integer Divide Instruction "Div". Since I have noticed > at least one individual who worked on the microcode for the > PDP-11, perhaps there is an explicit "Yes / No" answer to my > question: Since this actually have nothing to do with the microcode, and actually is nothing specific with the PDP-11 DIV instruction, just about anyone should be able to answer definitely. > If I divide 196612 by 3 - i.e. "Div (R2),R0" where R0 = 3, R1 = 4, (R2) = 3 > the result (in addition to the condition bits) is R0 = 1, R1 = 1 which is > exactly correct if the quotient is regarded as a 32 bit result with R0 being > the low order 16 bits of that result and the high order 32 bits are somewhere > else - probably inaccessible as far as programming is concerned, but easily > obtained by: > Mov R1-(SP) ; Save low order 16 bits of dividend > Mov R0,R1 ; Divide high order 16 bits > Clr R0 ; of dividend > Div (R2),R0 ; by the divisor > Mov R0,R3 ; Save high order 16 bits of quotient > Mov R1,R0 ; Divide the remainder > Mov (SP)+,R1 ; of the dividend > Div (R2),R0 ; by the divisor > i.e. R3 now contains the high order 16 bits of the 32 bit quotient > with R0 holding the low order 16 bits of the 32 bit quotient What you have implemented here, as well as described, is the exact way you should have been taught how to do division on paper in elementary school. Yes, that algorithm is valid, and can be extended to arbitrary sizes, as long as you remember the full method. > Can anyone confirm what I have found in practice? Certainly. It's basic math, the way it's taught in elementary school. That was atleast the first way I was taught how do do divides on big numbers on paper. > Even better would be a method of retrieving the high > order 16 bits of the quotient in a manner which takes > fewer instructions and without a second divide instruction! I doubt you'll find it. 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, 6 months

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system rescue PDP 11/53

by melamy＠earthlink.net

a gentleman named Steve Thompson has a PDP 11/53 "box" available for pickup in Stafford/Fredericksburg Virginia area (it is just the system cabinet - no peripherals, no manuals). He will have to dumpster it if no one wants it (he would hate to do that, but...). He needs to get it taken care of by the end of this month. I know nothing about the system, so please call him at 540-659-9906 for any additional info (he is not a computer collector as such so don't expect a lot of detailed info). Keep in mind that the phone number is Eastern Standard time, so please call before 9PM his time in the evenings (that's no later than 6PM for those of us that live on the West coast). Thanks. best regards, Steve Thatcher

20 years, 6 months

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Epson SD320 (5.25 inch floppy drive) notes

by ard＠p850ug1.demon.co.uk

SD320, SD321 drive dismantling ------------------------------- Remove the logic board : Undo the 4 screws fixing the logic board. The rear left is a long machine screw, rear right a short machine screw, centre right and front centre are (short) self-tapping screws. Lift the logic board to disconnect the 3 pin connector at front left (index/write protect sensors), 10 pin (positioner) and 3 pin (spindle motor) connectors at rear. Turn logic board over towards right side of the drive. Free the head cables from the clamps on the logic PCB, unplug the head connector. Set the logic board aside. On SD320 (with head load solenoid), dismantle the head load mechanism : Remove the screw and washer on top of the head load solenoid. Loosen the screw fro the rear bearing of the head load flap (this screw is on the left side of the drive chassis) until the bearing can be turned away from the pivot pin. Free the hard load flap from its front bearing, remove it, note how the compression spring fits over a peg on the base of the linear positioner. Remove the conical spring from the top of the head load solenoid, remove the solenoid armature. Remove the screw and bearing (loosened earlier). Remove the screw holding the head load solenoid to the chassis, lift out the solenoid and 'stick' it to the linear positioner magnet. When reassembling this section, note that the screw on top of the solenoid should not be fully tightened. Adjust it so that the heads load correctly when the drive is tested on an exerciser. Remove the linear positioner (voice coil assembly) : Undo the 2 screws + springs and the single countersunk screw fixing the linear positioner to the main chassis. Free the head cables from the clips on the right-hand disk guide. Place a piece of paper between the heads, lift the positioner from the rear and slide it out Remove the disk clamp : Unhook and remove the tension spring for the frontpanel button linkage. Mark the position of the index sensor on the disk clamp bridge to aid reassembly. Remove the 3 screws holding the bridge in place, lift it up and turn it over towards the left side of the drive (take care not to damage the index phototransistor wiring. Remove the 3 spacers from the slots in the disk guides. Free the index phototransistor wiring from the hooks on the bridge, remove the screw holding the phototransistor mount in place and remove the bridge completely. Remove the spindle motor and spindle : Remove the 2 screws holding the spindle motor in place. Remove the motor, slipping the belt off the pulley. Remove the belt from the idler and spindle. Remove the idler (one central screw, washer on top of bearing). Remove the central screw from the spindle hub, lift off the spindle hub and remove the bearings (crinkle washer under top bearing). If possible remove the washer from the fixed spindle in the chassis Remove the front panel : Remove the 2 screws and slide the panel out, taking care not to damage the index LED wiring. Remove the disk guides : Remove the right hand disk guide (2 screws). Remove the index LED mounting (1 screw), then remove the screw holding the left hand disk guide. Remove the guide. Undo the screw holding the sensor PCB to the guide and remove it. Dismantle the interlock lever : Unhook the tension spring from the eject linkage. Remove the E-circlip >from one end of the interlock lever pivot, slide out the pivot rod and remove the lever. Recover the compression spring. --------------------------------------------------- Dismantling the spindle motor ----------------------------- Do NOT dismantle the spindle motor unless absolutely necessary. Most electronic repairs can be performed without dismantling the mechanical section. However, should it be necessary to dismantle it, proceed as follows. Clean off the silicone rubber over the FG (frequency generator) coil wires. Try to avoid damaging the wires. Desolder them from the PCB pads. Bend up the 4 tabs on the bottom of the motor and pull off the housing complete with the FG coil. Support the motor on a bench vice with the pulley between the jaws. Using a hammer and pin punch, tap the spindle downwards until it is free from the rotor. Remove the rotor from the top of the motor. Remove the spindle, washer, and lower bearing. Push out the upper bearing. If the FG wires were damaged when the cover was removed, carefully scrape away the tops of the 3 heat stakes retaining the coil former inside the housing. Pull out the former (and lower pole piece), and either unwind one turn to give a longer end of wire for reassembly, or re-wind the coil. Put the former back in place, if you have been careful in removing it, it will snap in place without further fixing. Motor Protection Circuit : The circuit round Q33 removes the drive from the motor if the control voltage from IC10 rises too high (either because the motor is overloaded, or because the FG signal is missing). If this triggers too easily (the motor stops after a few seconds), decrease R76 to 56k --------------------------------------------------- Dismantling the positioner -------------------------- On an SD-320, desolder the head load solenoid leads from the positioner connector PCB and set the solenoid aside Undo the PCB retaining screw and allow the PCB to move away from the rear of the positioner. Undo the screw holding the graticule to the carriage. Remove the clamp plate under the screw, then with the heads fully 'out', free the graticule from the carriage and slide it out of the optical block. Straighten the end 2 tabs on the underside of the unit (these retain the cover on the velocity transducer). Remove the cover. Remove the rear section of the voice coil core, which is retained by a single screw under the rear of the positioner. Remove the 2 screws holding the voice coil and velocity transducer coil to the carriage. With the heads 'out', remove the pole piece from the middle of the velocity transducer coil (this is retained by magnetism only). Retract the heads, then lift the coils off the carriage. Leave them hanging on the flexible PCB Remove the clamps from the rear end of each head rail (1 screw each). Slide out the front clamp, then lift out the head carriage and remove the rails --------------------------------------------------- Dismantling the disk-inserted levers ------------------------------------ (These are the linkages on the left-hand disk guide.) Unhook the torsion spring and slide out the eject interlock flap. Remove the spring Unhook the torsion spring on the latch lever (top rear of the guide). Remove the E-circlip, the torsion spring and the latch lever Unhook the torsion spring on the disk-present lever (under the front of the guide. Remove the E-circlip, the torsion spring and the disk-present lever. Remove the E-circlips on the mounting posts for the frontpanel button slide. Remove the 2 washers, lift off the slide and recover the following parts : 2 spacers and 2 washers from the mounting posts ; 2 rollers from the slide ; 1 reaction plate from the guide --------------------------------------------------- Dismantling the disk clamp assembly ----------------------------------- Pull the disk clamp lever away from the bridge by hand until the disk clamp cone is free of the spindle. Slide the clamp cone out of the end of the lever. Unhook the torsion spring. Remove the E-circlip from the end of the pivot spindle, slide out the spindle and remove the torsion spring. Separate the clamp lever from the bridge. Unclip the 2 halves of the disk clamp cone and remove the compression spring. Press out the bearing. Remove the circlip and slide the bush out of the centre of the bearing. --------------------------------------------------- Bearings -------- Clamp Bearing ID : 4.6mm OD : 9.5mm Thickness 3.17mm (1/8") Motor Bearings and Belt Idler ID : 3mm OD : 8mm Thickness : 4mm Spindle Bearings ID : 4.75mm OD : 9.5mm Flange OD : 10.8mm Total Thickness : 3.15mm Flange Thickness : 0.75mm --------------------------------------------------- SD320 links : SS1 (6 position DIP switch) 1 : Drive select 0 2 : Drive select 1 3 : Drive select 2 4 : Drive select 3 5 : Head load from pin 4 of interface connector * 6 : Head load from drive select SS2 : HS : Load controlled by head-load signal * MS : load controlled by motor enable SS3 : DS : In-use LED controlled by drive select HL : In-use LED controlled by head load drive * --------------------------------------------------- Testpoints : 1 : Ground 2 ) Differential outputs of read amplifier 3 ) 4 ) Differential inputs to comparator 5 ) 6 Index sensor 7 Index pulse 8 Drive Select/

20 years, 6 months

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TF20 Notes

by ard＠p850ug1.demon.co.uk

TF20 disk drive notes ---------------------- Dismantling ------------ Case : Remove the 4 screws from the sides, lift off the top cover, then turn the unit over and remove the base cover Rear panel : Unplug the serial cable from the serial PCB. Undo the 2 screws under the rear of the unit. Slide the rear panel out rearwards, unplug the transformer secondary winding connector from the PSU PCB. Serial PCB : Remove the 4 retaining screws and unplug this PCB from the bus connector on the controller Controller PCB : Unplug the power harness and the internal disk drive cable from the controller PCB.. Remove the 4 retaining screws and the 4 tapped spacers (used to support the serial PCB). Remove the controller board PSU : Unplug the power connectors from the drives. Unplug the power LED connector from the PSU PCB. Unplug the controller board power harness >from the PSU PCB and remove it. Undo the 2 screws holding the PSU PCB to the bracket, then the 2 screws holding the regulator hybrid module to the transformer cover. Remove the PSU PCB and recover the insulating sheet >from under the hybrid module. Drives : Unplug and remove the disk drive cable. Remove the 8 screws (4 on top, 4 underneath) that retain the drives and slide the drives out from the front. Remaining chassis parts : Free the power LED cable from the clips on the chassis. Remove the 2 crews under the front of the unit and remove the front panel. Remove the 2 self-tapping screws that retain the power LED PCB to the front panel and remove it. Remove the PSU bracket, the transformer cover and the controller bracket (2 screws each). Rear panel dismantling : Unplug the transformer primary winding connector >from the filter PCB. Undo this PCB's retaining screw, unplug the faston tabs from the power switch and remove the filter PCB. Remove the fishpaper insulator. Undo the 4 nuts retaining the mains transformer, remove the claw washers and the transformer. Unplug the remaining 2 faston connectors from the rear of the power switch, unscrew the earth wire from the chassis (note claw washer under the solder tag), remove the 2 retaining screws and the mains input connector. Unclip and remove the power switch. Undo the 2 retaining screws for each DIN socket and remove the serial cable harness. When reassembling, the 6 pin DIN socket is the upper one, both DIN sockets are fitted with the keyway towards the centre of the panel. ------------------------------------------ Controller PCB links : J1 : 1 : RAMVdd = 12V (16K RAM) 2 : RAMVdd = 5V (64K RAM) * J2 : 1 : Write Precompensation enabled 2 : Write Precompensation disabled * J3 : 1 : EPROM pin 21 = A11 (2732) 2 : EPROM pin 21 = +5V (2716) * 3 : EPROM pin 18 = A11 J4 : 1 : EPROM pin 18 = CS/ * 2 : EPROM pin 21 = CS/ J5 : 1 : Ready line always active * 2 : Ready line from drive J6 : 1 : 16K RAM addressing 2 : 64K RAM addressing * J7 : 1 : RA< A7 toed high (16K RAM) 2 : RA< A7 lined to address mux (64K RAM) * ------------------------------------------ Serial PCB links : J1 : Clock / 128 (2400 baud) J2 : Clock / 64 (4800 baud) J3 : Clock / 32 (9600 baud) J4 : Clock / 16 (19200 baud) J5 : Clock / 8 (38400 baud) * J6 : Clock / 4 (76800 baud) Exactly one of J1..J6 must be fitted J7 : Open : Enable oscillator round CR2 (4.1953 MHz) * Closed : Enable oscillator round CR1 (not fitted) ------------------------------------------ Controller PCB testpoints : TP1 : RAS/ TP2 : CAS/ TP3 : Rd Data TP4 : VCO control voltage TP5 : VCO output TP6 : DW TP7 : Ground ------------------------------------------ Serial PCB testpoints : TXCA : Baud Clock (*16) to serial chip TXDA : Serial data output to host RXDA : Serial data input from host TXDB : Channel B serial data output (not used) RXDB : Channel B serial data input (not used, pulled high via 10k resistor)

20 years, 6 months

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Epson laptop cables

by ard＠p850ug1.demon.co.uk

HX20 RS232 Cable ---------------- DIN8 DB25-P 1 ------Bk----Gnd----------7 2-------W-----TxD----------2 3-------R-----RxD----------3 4-------Y-----RTS----------4 5-------Pu----CTS----------5 6-------Bu----DSR----------6 7-------Gn----DTR----------20 8-------Br----CS-----------8 E-------Shield-------------1 PX4 / PX8 RS232 Cable --------------------- Mini-DIN 8 DB25-P 1 -------Bk------Gnd---------7 2 -------W-------TxD---------2 3 -------R-------RxD---------3 4--------Y-------RTS---------4 5--------Pu------CTS---------5 6--------Bu------DSR---------6 7--------Gn------DTR---------20 8--------Br------CD----------8 E-------Shield---------------1 PX4 / PX8 Null Modem Adapter ---------------------------- Mini DIN 8 DB25-S 1 -------Bk------Gnd---------7 2 -------W-------TxD---------3 3 -------R-------RxD---------2 4--------Y-------RTS------+--8 5--------Pu------CTS------+ 6--------Bu------DSR---------20 7--------Gn------DTR---------6 8--------Br------CD-------+--4 +--5 E-------Shield---------------1 HX20 - TF20 ----------- DIN5 DIN6 1----Bk------Gnd-------5 2----W-------PTX-------3 3----R-------PRX-------1 5----Bu------PIN-------2 4----Gn------POUT------4 PX4 / PX8 - TF20 ---------------- Mini-DIN 8 DIN6 1------Bk----Gnd-------5 2------W-----PTX-------3 3------R-----PRX-------1 6------Bu----PIN-------2 7------Gn----POUT------4 PX4 Cassette Adapter -------------------- Note : Use Maplin PS2 extension lead, cut in half, use the plug end only, and cut off the extra pin (thus converting the plug to a mini DIN 5 Mini-DIN 5 DIN5 Socket 1 ----Br-----Gnd----2 2-----Or-----RMT----1 3-----Y------RMT----3 4-----Gn-----Mic----5 5-----Bk-----Ear----4

20 years, 6 months

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Epson HX20 RS232 port from BASIC

by ard＠p850ug1.demon.co.uk

I've been working on some Epson laptops and their associated TF20 drive. I'll post my notes on the TF20 and the drive mechanisms (SD320) as separate messages, along with the wirelists of the various cables I've made. One other thing that might be of interest : The 34 pin connector on the back of the TF20 is not some kind of parallel host interface. It's exactly what you'd expect a 34 pin connector on a disk controller to be -- namely a SA400-compatible disk drive bus. The hardware can handle up to 4 drives which can be connected either to the intenral drive connector or to the connector on the back. I have no idea if the standard software (which is clearly CP/M based) can be made to support more than the 2 internal drives. The hardware also seems to support FM operation (unlike the QX10, which seems to be MFM only), I have no idea if the software does There is a spave for another 34 pin connector on the PCB. This is some kind of parallel interface, the missing 4 pin chip is an 8255. Again I have no idea if the software cane be made to support it. But shorting pins 33 and 34 on this connector will do a hard reset of the controller, which can be useful to know when debugging one. As is well-known, I think, the TF20 controller is really a CP/M-based computer. There's a Z80 with 64K DRAM in there. The EPROM contains something that looks suspiciously like a CP/M BIOS, it's copied to the top of RAM after reset, then the EPROM is switched out. My TF20 didn't work. It never tried to load an OS from disk, it never responded to commands from the host. The first thing to ckeck was the PSU rails (including the -12V line that's generated on the controller board), all were fine. The Z80 was clearly clocking, it was executing instructions (looked to have got trapped executing FF from loacation 38, if you see what I mean :-)). The EPROM was not swtiched out (this was interesting. The EPROM can be swtiched out in software, but can never be switched in again other than by a hardware reset. So this meant the EPROM had never been swtiched out). I looked at the start of the EPROM code. It copies the BIOS to the top of RAM, then jumps to the cold boot entry point. The first thing this does is to swtich out the EPROM. I usspected a RAM problem -- the BIOS in RAM therefore couldn't be executed correcrtly. A few chyecks showed that the address lines at the RAM (after the multipleser) were fine, so were RAS/ and CAS/. I susepcted a RAM chip. I desoldered all 8 RAMs (no easy way to run a RAM test in that unit), then put sockets in their place. Put the RAMs into an old IBM PC, it failed the POST and told me one of the RAMs was dead. I put the other 7 back in the TF20 along with a replacement. It now works fine. I have a little problem with the HX20. I've been using the RS232 port from disk BASIC (I suppose I should see if ROM BASIC behaves the same way). According to the user manual, the way to do this is to do something like OPEN "O",1,"COM0:(58N1F)" WHere ; The first "O" means open it for OUTPUT The paramters in brackets are : Baud Rate (here 5 == 2400 baud) Word length (8 bits) Parity (none) Stop bits (1) Handshake control (here F) It's the last that's giving me problems. According to the user manual, this is a single hex digit, the bits of which are used as follows Bit 3 : Is DSR enabled or masked out Bit 2 : Is CTS enabled or mashed out Bit 1 : State of RTS output Bit 0 : Is CD enabled or masked out I may have got bits 3 and 2 the wrong way round, but anyway. The problem is that bits 1 and 0 seem to do nothing. RTS is always turned on when the port is openned, CD is always ignored. DSR and CTS behave as I'd expect them to. Is this a known bug in the BASIC, or is there some very odd fault with my HX20? -tony

20 years, 6 months

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Xenix 286?

by doc＠mdrconsult.com

I'm looking for something Unix-ey to run on this 80286 system. It has 640KB RAM, and uses prorietary memory modules, so even Minix is going to be an extremely tight fit. Mostly out of curiosity, I'd like to try Xenix on it. Does anyone have install images I could "evaluate"? Xenix 286 was apparenly (judging by some BIOS parameters) a supported OS on this Compaq. Doc

20 years, 6 months

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anyone familiar with Soft-LA

by chrism3667＠yahoo.com

turns your pc (286 or faster) into a logic analyzer __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

5
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Where's this from?

by Watzman＠neo.rr.com

It is a gag. This photo is described in detail on snopes (a "mythbusters" site). The base setup is actually a submarine control room in a museum to which a few things have been changed and added and the description created. >> This has got to be a gag, but what's its origin? >> >> http://subjunctive.net/images/2004/rand-home-computer.jpg > >I don't have graphics, but I think most of the picture you're >talking about is a nuclear sub's reactor/electrical/steam control >panel that's on display in the Smithsonian, with a DECwriter >and guy and TV screen photoshopped on top. Am I too far off?

20 years, 6 months

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good online sniper

by billdeg＠degnanco.com

I do it the old fashioned way, with a high-speed connection, two browser sessions, and stop watch! >I think that hidden away in the Ebay user license is something about how >external services have to pay some sort of fee in order to interface with >Ebay. This is why there are not hoards of freeware versions of Power >Lister, and anooyingly to me, not a good Mac version. This is also >probably why free sniping programs are not forthcoming. > >I suppose Ebay can invalidate bids or users that use services that do not >pay this fee. > >Time to move off Ebay, folks. > >William Donzelli >aw288 at osfn.org

20 years, 6 months

2
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MSCP SCSI CD-R(W)?

by bqt＠update.uu.se

"Zane H. Healy" <healyzh at aracnet.com> wrote: >>Saw an interesting discussion about CD-ROMs with MSCP SCSI (YES, a >>CD-ROM ISO with XXDP would be truly awesome!) and this got me thinking >>about my own UC07 controller - if I've understood correctly, this >>controller does not support SCSI tape. >> >>I don't really know anything about MSCP or the SCSI command set that CD >>writers use - but could a CD-R(W) drive be used as a backup device? >> >>I know it's bad style to do backups on CD-R, but bear with me :) > > I don't see why not, but you'll have to write the software to control it. I very much doubt it. Writing to a CD-R is not done the same way as writing to a disk. And MSCP-SCSI controllers only do writes as to a disk. CDs need to have lead-ins, lead-outs and whatnots in between. (Underruns, anyone?) > You're also likely to find that it's very picky about what it will work > with. At least with my Viking QDT and UDT controllers I *think* 512-byte > blocks are a requirement, and I know they won't work with all 512-byte block > CD-ROM drives. My CMD controllers have been happy with every CD drive I've tossed at them, but I admit it hasn't been that many different models, so I might have been just lucky. > An easier sollution is to have the SCSI HD's in removable trays, and Have a > modern Unix box with the same type SCSI tray. Plug the PDP-11 disk into the > Unix box, and use 'dd' to image the disk. The resulting image can even be > used under SIMH. That would definitely be easier. If you wanted backups, you could then burn that image to a CD on the Unix box. >>Also, now that I think about it, the perverse bugger that I am, could an >>MSCP controller send an Audio CD Play/Next Track/etc. command to the >>CD-ROM? Would be awesome to have a hifi controlled by the PDP-11. :) > > No clue, but I rather doubt it. Same problem. SCSI command to play around with audi CDs don't have any corresponding stuff in MSCP, so there is no way to map that. In short, MSCP can't do it. Don't matter what SCSI can. You are limited to what MSCP can do, since it is a MSCP controller. What it talks at the other end is pretty irrelevant. 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, 6 months

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MSV11-QB woes

by toresbe＠ifi.uio.no

Hey, I have two MSV11-QBs here, each 2 meg parity QBUS memories. I'd like to put both in the same system, creating a 4 meg PDP-11, but I can't find the DIP switch settings for them. The PCB in the PDF has the DIP switches placed differently on the board, and the settings I try don't seem to work, I'm throwing memory errors, and the boards appear in the wrong places. the PCB revision is 5017547-01-D1-P2 while the PDF depicts a C1. I don't know if that's the problem, but the boards do look different. What I previously had was __Q22_______ _______Q/CD______ / \ / \ |Emul|DHV-|DHV-|DELQ|Gran|MSV-|PDP-| |ex S|11 |11 |A |t co| 11 |11/ | |CSI | | | |ntin| |83 | | | | | |uity| QB | | | | | | | | 0- |CPU | |----| | |----|----| 2m | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 7 6 5 4 3 2 1 What I've changed it to is: _______Q22_______ _______Q/CD______ / \ / \ | |TK50|DHV-|DHV-|DELQ|MSV-|MSV-|PDP-| | |Cont|11 |11 |A |11 | 11 |11/ | | | | | | | | |83 | | | | | | | QB | QB | | | | | | | | 2- | 0- |CPU | |----|----| | |----| 4m | 2m | | |RQDX|Emul| | | | | | | | 3 |ex S| | | | | | | | |CSI | | | | | | | | | | | | | | | | | | | | | | | | | 8 7 6 5 4 3 2 1 With both memory boards in, the CPU diag ROM reports that I have small ROMs placed around the memory space and one RAM board somewhere in space of some strange size. I assume that's because the DIP switch settings are wrong. Anyone have the docs? Or know what the DIP switch settings are for setting them to 0-2M and 2-4M? Thanks very much in advance for your help! -toresbe

20 years, 6 months

1
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(Fwd) RE: Looking for an ADM-3a

by dave06a＠dunfield.com

I was contacted by a gentleman who wishes to purchase an ADM-3A. He is located in Northern VA. If anyone can help, please contact Jim at: jAt {at} feeCzell {dot} Ccom [Remove the capitals and do the appropriate conversions] Or contact me and I will pass it on. Dave -- dave06a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

20 years, 6 months

1
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Mac Plus, etc. rescue in San Diego

by jfoust＠threedee.com

>From: "Miriam Mustain" <pmustain at ispwest.com> > >We are in San Diego, California. Mir > >>Hi: >>My mother has the following equipment and would be willing to donate it if >you could pay the shipping. >> >>Macintosh Plus 2MB >>Model # M0001A >>Serial # *F745B8SM0001A* >>FCC ID # BCG9GRM0001A >>MacWrite and MacPaint discs >> >>Apple 3.5 Drive >>P/N 825-1304-A >>Serial # Y780BFJ >> >>Image Writer II Printer >>Model # A9M0310 >>Serial # 0591245 >>FCC ID # BCG9BUA9M0310 >> >>The printer is a very pale yellow color in comparison to the neutral tan of >the computer. I can't tell whether this is due to age or its original >color.

20 years, 6 months

1
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dec plastic panel mounts - ordering?

by aek＠bitsavers.org

2) How many people would be interested in some if the price is reasonable? -- probably lots if the ends were redesigned NOT to break off

20 years, 6 months

3
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Teletype 31?

by CPUMECH＠aol.com

Heard of a 28, 23, 33, but no 31.

20 years, 6 months

6
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URGENT: Data recovery assistance needed in New Haven, CT

by aek＠bitsavers.org

We have this exact problem today, a SCSI MO disk from a GE CT scanner and no system to read it. -- Try contacting Phil Jones at http://www.medpacs.com

20 years, 6 months

1
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11/34a problems continue

by fireflyst＠earthlink.net

Well, I've been messing with the 11/34 on and off now for a few months as I feel like it. The problem right now is that I have no light on the H745 power regulator. Both lights are on, on the two H7441s in the other slots. If I need to measure draw on the backplane to solve the problem, where do I do it from? If on the power distribution board or backplane, then at what points? Secondly, do certain modules need to be installed to utilize the H745's resources? (i.e. a device that uses -15vdc) or should the light come on anyway from just being connected to the power distribution board? I've tried with both those modules in and removed from the system, and it didn't seem to make a difference. What do I need to do to diagnose this problem? It's really driving me nuts. Appreciating any help you can give, Julian

20 years, 6 months

2
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dec plastic panel mounts - ordering?

by jwest＠classiccmp.org

I was showing someone my collection, and while standing in front of my 11/45 restoration project I lamented about how those little black plastic brackets that attach to the upright rails just can't be found anymore. You know the ones... the bracket has two round knobs that always break off - these are used to mount DEC filler panels. He said he knew a plastics firm that may be able to do a short run at a reasonable price. Failing that, he felt another company he knows of may be able to make them out of metal. This gives rise to two questions... 1) Would replicas made of metal work as well as replicas made of plastic? 2) How many people would be interested in some if the price is reasonable? And how many? I know a few of my systems I'd go back and use 4 brackets on each panel instead of the 2 I skimped on. In addition, a few racks I simply couldn't mount filler panels at all because of no brackets. Of course, before the guy can quote me a price I need to give him a firm minimum count. The more in the firm count the lower the price is. I figured I'd order 40 or 50 if the price was reasonable. But I'm sure my own order would be cost prohibative unless other collectors jump in. On the other hand, if some collector has a big crate of these, I'd rather just buy pile of originals :) Jay West

20 years, 6 months

2
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paging bill dawson

by jwest＠classiccmp.org

Anyone have a good email address for Bill Dawson? Jay

20 years, 6 months

1
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Enigma code cracked after 60 years

by dwight.elvey＠amd.com

Hi I thought a few might be interested in this: http://heritage.scotsman.com/topics.cfm?tid=973 Dwight

20 years, 6 months

2
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ibm tapes available

by jwest＠classiccmp.org

I found these tapes in an old warehouse today. They are with original IBM lables, but I'm offering them as scratch media. There are six tapes, labled as follows: 9404-E10 Model P/N 0421F3011 (OS?) AS/400 Control Language 1988 V1.3 IBM AS/400 System Program V3 tape 1 of 4 .... tape 2 of 4 .... tape 3 of 4 .... tape 4 of 4 (includes complete PTF's) Tapes are QIC-6525, and are available free for shipping costs. Jay

20 years, 6 months

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Random things available for trade

by rcini＠optonline.net

All: As I clean the shop a bit I've come across a few things to trade. As I continue working, I'll pull some other things together and post them. So far: * NEC 8080 evaluation kit "EVAKIT-8" includes board and manuals. * "Inside Commodore DOS" book * Various BYTE mags (YR:MO): o 75/12 o 76/4 o 77/2, 3, 10, 11 o 78/1-6, 9 o 79/1, 5-7, 9, 10, 12 o 80/4, 7, 1, 10 o 81/3-5 o 82/full year o 83/3, 8 o 84/3 Wanted: * "vintage" 5.25" external floppy drive case suitable for two drives (preferably full-height but half-height OK) * CP/M boot disks/CBIOS/loader listing suitable for SD Sales VersaFloppy controller Location: 11791 If interested, please contact me off-list. 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, 6 months

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URGENT: Data recovery assistance needed in New Haven, CT

by mamcfadden＠cmh.edu

I actually think I saw a system like this at the local computer surplus place about a year ago. It had a display like a Microfiche viewer with a MO disk drive and a hard copy output connection to a laser printer. Somewhere I have one of the disks. *****PREPARE FOR LONGWINDED COMMENTS***** I'll bet the data is not in a standard format. The hospital where I work has lots of MO disk using systems, CT scanners, data backups for patient monitoring, Cardiology cath lab and they all use non standard data formats. The CT and cath lab are the worst they use a raw file structure that is directly read and written by the system. They also encode the data in a compressed format to pack more data on the disk. The MO disk media manufacturers are also not producing the media any more. I have several of the drives but we have never been able to read one of the disks without the drive it was originally created on. The venders consider the storage format proprietary and will not release it. Back 10-12 years in the past we reverse engineered the data structure that was on an LMSI 12" optical drive containing digital x-ray images. There was a hierarchy on the disk and the data was stored in a run length encoded format of the differences between different resolutions of the images. We made disks up with 1 image and then compared it to a blank disk, then added an additional image and repeated the process. We were eventually able to read the disks offline and purchased LMSI drive to connect to our VAX. We have this exact problem today, a SCSI MO disk from a GE CT scanner and no system to read it. We kept the drive but there is no software. GE will sell you a system with software to read the disk for $20,000 or transfer an individual disk for a fee. Mike

20 years, 6 months

1
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Thanks guys :-)

by legalize＠xmission.com

I don't know if it was due to cctalk'ers or not, but ebay just gave me $100 gift certificate for the serial terminals guides that I wrote. If you voted my guide(s) as useful, thanks! -- "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, 6 months

1
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RSTS on a VAXserver 4000?

by legalize＠xmission.com

Can you run RSTS on a VAXserver 4000? It just occurred to me that this might be possible. From my personal usage I had only thought of RSTS in a PDP-11 context. If it can run, am I limited to using a particular version (presumably because it would need VAX support?). PS: Recent addition to LibraryThing: VAX Systems & Options Catalog 1988. I will be scanning/uploading the pages on the VAXstation 8000 to my web area soon as this is a machine with E&S 3D graphics hardware. -- "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, 6 months

2
1
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MSCP SCSI CD-R(W)?

by toresbe＠ifi.uio.no

Saw an interesting discussion about CD-ROMs with MSCP SCSI (YES, a CD-ROM ISO with XXDP would be truly awesome!) and this got me thinking about my own UC07 controller - if I've understood correctly, this controller does not support SCSI tape. I don't really know anything about MSCP or the SCSI command set that CD writers use - but could a CD-R(W) drive be used as a backup device? I know it's bad style to do backups on CD-R, but bear with me :) Also, now that I think about it, the perverse bugger that I am, could an MSCP controller send an Audio CD Play/Next Track/etc. command to the CD-ROM? Would be awesome to have a hifi controlled by the PDP-11. :) TIA, -toresbe

20 years, 6 months

4
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Is www.teac.com gone?

by dwight.elvey＠amd.com

Hi I can't get www.teac.com. Is this gone?? Dwight

20 years, 6 months

2
1
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good online sniper

by melamy＠earthlink.net

check out www.bidrobot.com they charge a flat subscription fee. You can spend as little or as much and it won't cost you anything but what ever you buy. best regards, Steve Thatcher At 04:57 PM 3/2/2006, you wrote: >eSnipe charges 1%. Most of my purchases are less that $100 so a few >cents for a service that allows me to do something else instead of >watching an auctio is worth it to me. To each their own.

20 years, 6 months

9
8
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Gatorbox CS

by mloewen＠cpumagic.scol.pa.us

Does anyone have a Gatorbox CS for sale? Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://ripsaw.cac.psu.edu/~mloewen/Oldtech/

20 years, 6 months

2
1
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[UCSDPascal] ? - what is the smallest machine running the P-system

by jfoust＠threedee.com

At 03:08 AM 3/3/2006, Willi Kusche wrote: > I did all my development on a Commodore 32K PET equipped with an S-100 buss >adaptor. The S-100 buss had a 32K RAM card and a Versafloppy disk controller >card connected to two 8 inch single sided single density drives. All the >source is on 8 inch disks. I still have the disks but the question now is, did >the disks keep? The system is still set up in the den but it's been years since >I've turned it on. Now, I'm afraid of what will happen if I try to power it up. Yes, the old capacitors in the power supply may have trouble. But the disks are probably OK. They used big, long-lasting bits back then. I am sure some of the folks on the Classic Computer Collector mailing list http://classiccmp.org/ can give advice about how to read those floppies. If the PET was just handing it sectors, it's just a matter of reading the raw sectors and then reassembling it into a disk image that could be handled by some other utility. - John

20 years, 6 months

1
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HP 7906 disk drives available

by rigdonj＠cfl.rr.com

A friend of mine has three HP 7906 drives that he wants to get rid of. Two of the drives look complete and in very good condition, the third looks complete but is missing the front face plate. He's asking $50 each. They're in Sanford Florida and will need to be picked up in person. SHIPPING, STORAGE, DELAYS, ETC ETC ETC IS NOT AN OPTION! DON'T EVEN ASK. We've tried that before it didn't work! We'd like them gone ASAP!! If seriously interested call Art directly at (407) 402-6361. We do have a forklift, pallets, etc available so you can pack and load them but we're not going to spend our time doing it. We have too many other projects that we're already way behind on. Joe

20 years, 6 months

1
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bogus auction for Altair system on eBay

by jack.rubin＠ameritech.net

I exchanged several emails today with an eBay seller offering an Altair system with disk drive for a starting bid of $2 in a one-day auction. This is a bogus offer - I became uneasy when the seller solicited an offline offer in response to a query about shipping but insisted on payment through Western Union rather than PayPal, even though the orginal auction listed PayPal as a preferred option. It is interesting to note that the auction I saw this morning (offered by seller DOCHANDS) was cancelled by eBay almost immediately but the _identical_ auction (same pictures and extensive text) is currently (2/21/06 @ 11:31 pm) being offered by two different sellers - as auction 6038449898 by GUNDAN760 and as auction 6038549050 by SHARISINA. It looks like the "seller" is hijacking legitimate eBay accounts to use as bogus fronts for his dealings. Caveat emptor. Jack -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.12/265 - Release Date: 2/20/2006

20 years, 6 months

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Sirius 1 (aka Victor 9000) on Ebay (UK)

by chrism3667＠yahoo.com

what you get someone whos got everything else. Or at least every other IBM incompatible on the planet (ok Im not quite there). Also a must for the truly masochistic (gcr floppies). What every guru/sicko needs. Alas the shipping is prohibitive if youre on this side of the pond. --- Free_Software_for_DOS at yahoogroups.com <d_andrianov at mail15.com> wrote: > > I don't know if there is a mirror... But I have tried > downloading the files again and it works! Try > downloading later. By the way, the program is just a > much more functional version of GS which is already on > the Free Software For DOS website. > > Denis > > > > Short Stop's Pages <short_stop_for_software at yahoo.com>: > > > On 9 Feb 2006 Denis Andrianov wrote (snipped): > > > > > Tja, hier habe ich geplant, andere Programme zu > stellen, die > > > eventuell von Nutzen sind. Die kriegen allerdings > keine technische > > > Unterstützung* von mir. Aber ich freue mich > auf Bescheid, wie > > > das Programm bei dir funktioniert hat... and bugs, too! > > > > :) I recognized that broken German text, because... > > > > > Hi everyone. It has been very quiet lately on this > > > mailing list. Anyway, here is something interesting. A > > > new (2005) port of Ghostscript is now available for > > > DOS. ............ Please > > > add this link to the Free Software for DOS site: > > > http://www.caddit.net/programming.php. > > > > ... I've visited that site repeatedly since December, > and tried to > > download the Ghostscript binary and source packages, > but no luck - the > > server stops serving. I know for sure that's the > problem, because I get > > > > its timeout message, appended to the part of the ZIP > file that actually > > > > comes down the pipe. > > > > So until that problem gets fixed, and I can look the > program over, I > > can't recommend it in the Free Software pages. > > > > Denis - do you know if there is another download site? > > > > Peace, > > Steve @ Short.Stop > > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > protection around > > http://mail.yahoo.com > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > <*> To visit your group on the web, go to: > http://groups.yahoo.com/group/Free_Software_for_DOS/ > > <*> To unsubscribe from this group, send an email to: > Free_Software_for_DOS-unsubscribe at yahoogroups.com > > <*> Your use of Yahoo! Groups is subject to: > http://docs.yahoo.com/info/terms/ > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

5
6
0 0

floptical drives

by danny＠bowers.abelgratis.com

Hi, Sorry to trouble you but I have found a 50 pin SCSI Insite I 325VM floptical drive amongst my Amiga bits. Can this read/write to Amiga 880K floppy disks please? What else can it do? Regards, Danny.

20 years, 6 months

2
1
0 0

Old Eprom Burner

by wallyc＠memex.ca

Hi Teo, Did you get any info on the Q-920. I also have one, without manual, and would like to get a manual too. Thanks Have a fantastic day. Kind regards, Memex Electronics Inc. Wally Cassell 777 Walkers Line Burlington ON Canada L7N 2G1 ph (905) 635-3040 fax (905) 631-9640 www.memex.ca sales at memex.ca --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.443 / Virus Database: 248 - Release Date: 1/10/2003

20 years, 6 months

1
0
0 0

TI Travelmate

by john＠guntersville.net

Does anyone have information on the TI Travelmate LT220/V. A quick Google didn't turn up anything of value. I have acquired one with a pile of other items and have no idea how useful it might be. The power source, 18V DC did not come with it and there is no indication as to whether the center pin of the power connector is the positive connection or not. TIA John

20 years, 6 months

7
17
0 0

Fixing 8" disk hubs

by melamy＠earthlink.net

Another non-obvious possibility is that the disk jacket itself has been pinched around the edges and the extra friction is keeping the disk from spinning in the jacket. If you need the info off the disk, cut a small margin of the jacket off around the edges or you can remove the internal disk itself and put it in a known good jacket (cut just one end of the jacket for the disk to slide back into the jacket). Experiment... best regards, Steve Thatcher -----Original Message----- >From: Tony Duell <ard at p850ug1.demon.co.uk> >Sent: Mar 2, 2006 1:31 PM >To: cctalk at classiccmp.org >Subject: Re: Fixing 8" disk hubs > >> >> All: >> >> >> >> I'm restoring an IMSAI system which has an Icom "Frugal Floppy" >> system setup (8" FD-400 drives). I've been getting CRC errors since I got it >> running a few weeks ago, so I decided to run it with the cover off to try to >> see what's going on. Tonight I noticed that the floppy disk itself wasn't >> spinning. The hub engages when the door closes but it must be *just* missing >> contacting the diskette by *this* much. >> >> >> >> What kind of tricks are people using to improve the contact >> between the floppy disk and the spindle hub? I remember they made "hub >> protectors" for 5.25" disks - is there something similar? Other ideas? > >I think you're going about it in the wrong way. If the disks are not >obviously physically damaged (and you don't mention that they are), the >drive should grip them. If it doesn't, the fault is with the drive, not >with the disks. And I never believe in 'curing the symptoms' > >For some reason your drive is not clamping the disk properly. Maybe >there's a spring that's not providing enough tension. Maybe a mechanical >latch is not alighned properly and the clamp is not held down far enough. >I would start looking at something like that. > >-tony

20 years, 6 months

2
1
0 0

Need datasheet from HP 1989 Opto handbook

by philpem＠dsl.pipex.com

Hi, I'm trying to track down a copy of a datasheet from the Hewlett Packard 1989 Optoelectronics Handbook. Does anyone have a copy of this databook lying around somewhere? The datasheet I'm after is the one for the Thinkjet printer head - part number believed to be 51604A, though this may be different to the one in the databook (HP have this rotten habit of 'improving' things and changing the part numbers in the process). Thanks. -- Phil. | Kitsune: Acorn RiscPC SA202 64M+6G ViewFinder philpem at dsl.pipex.com | Cheetah: Athlon64 3200+ A8VDeluxeV2 512M+100G http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700 256M+40G

20 years, 6 months

6
8
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Low-cost Online File Conversion Service - converts instantly between file formats

by radvance＠rochester.rr.com

To: classiccmp at classiccmp.org We offer a unique "instant online conversion" service, which converts your files between most word processor, spreadsheet and graphics file formats, internet formats such as HTML and XML (including to Microsoft Office 2003 XML), and also some data base formats. It also performs letter-perfect conversion of almost any such file to PDF. IT CAN CONVERT BETWEEN MORE FILE FORMATS, AND CONVERT MORE ACCURATELY THAN ANY OTHER ONLINE CONVERSION SERVICE WE KNOW OF! This service is available 24/7. There is no software to purchase, nor any subscription fee or commitment. You just pay as and when you need to convert files. Converting a small set of files costs as little as $9. This is an easy-to-use and reliable conversion service. From the service's web page, you click a "Convert" button, drag files to be converted into a dialog box that appears, and enter payment information. Your files are then uploaded to our conversion server, and in a couple of minutes the converted files are downloaded back to you. It's as simple as that. The whole process is automatic and very easy to use. All communication is encrypted and there is no security compromise. Please see http://www.acii.com/online.htm for more details. This service is particularly useful for conversions you run into occasionally, or for which off-the-shelf conversion software is not available. We welcome you to give this service a try. Please see http://www.acii.com/online.htm for a detailed listing of the file formats, pricing and other details. If you have any questions please let us know (simply respond to this email). To be removed from this mailing list, please respond with the single word "remove" in the subject line. Best Regards, V. Saini, for Advanced Computer Innovations, Inc. ADDRESS: 656 Kreag Road ~ Pittsford, NY 14534-3730 (USA) PHONE: (US)-585-385-3810 | FAX: (US)-585-385-6822 WEB: http://www.acii.com

20 years, 6 months

5
6
0 0

URGENT: Data recovery assistance needed in New Haven, CT area (cctalk)

by woyciesjes＠sbcglobal.net

I'm sending this one message to everyone who replied. Thanks guys... Anyway, here is everything I know about these discs. Unfortunately, the guy who knew about these is long gone (the usual ;). They are Canon CanoFile 502M Magneto Optical discs. Double sided, 256 MB per side. Physically they are 5 1/4" x 6". They were used in a Canon document imaging system. Don't know what OS it ran on. As it stands right now, it appears that the discs with the data we need aren't here. But we still want info about what we may need, and how much it'll cost, if we do need to read these in the future. Thanks again... -- --- Dave Woyciesjes --- ICQ# 905818 --- AIM - woyciesjes

20 years, 6 months

1
0
0 0

Fixing 8" disk hubs

by rcini＠optonline.net

All: I'm restoring an IMSAI system which has an Icom "Frugal Floppy" system setup (8" FD-400 drives). I've been getting CRC errors since I got it running a few weeks ago, so I decided to run it with the cover off to try to see what's going on. Tonight I noticed that the floppy disk itself wasn't spinning. The hub engages when the door closes but it must be *just* missing contacting the diskette by *this* much. What kind of tricks are people using to improve the contact between the floppy disk and the spindle hub? I remember they made "hub protectors" for 5.25" disks - is there something similar? Other ideas? As always, 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, 6 months

5
7
0 0

Fixing 8" disk hubs

by dwight.elvey＠amd.com

Hi Also, make sure that the disk isn't being clamped too tightly by the disk envelope. I've seen this happen a number of times by disk that were stored tightly in a bunch of disk. Things usually work OK if I manually rotate the disk in the envelope a few times but I've had to remove the disk from the envelope in a couple cases. Dwight >From: ard at p850ug1.demon.co.uk > >> >> All: >> >> >> >> I'm restoring an IMSAI system which has an Icom "Frugal Floppy" >> system setup (8" FD-400 drives). I've been getting CRC errors since I got it >> running a few weeks ago, so I decided to run it with the cover off to try to >> see what's going on. Tonight I noticed that the floppy disk itself wasn't >> spinning. The hub engages when the door closes but it must be *just* missing >> contacting the diskette by *this* much. >> >> >> >> What kind of tricks are people using to improve the contact >> between the floppy disk and the spindle hub? I remember they made "hub >> protectors" for 5.25" disks - is there something similar? Other ideas? > >I think you're going about it in the wrong way. If the disks are not >obviously physically damaged (and you don't mention that they are), the >drive should grip them. If it doesn't, the fault is with the drive, not >with the disks. And I never believe in 'curing the symptoms' > >For some reason your drive is not clamping the disk properly. Maybe >there's a spring that's not providing enough tension. Maybe a mechanical >latch is not alighned properly and the clamp is not held down far enough. >I would start looking at something like that. > >-tony

20 years, 6 months

1
0
0 0

RARE DEC PDP 1 MEG MEMORY BOARD on EBAY. HA! Item number: 8773655976

by lbickley＠bickleywest.com

Being a member of the PDP-1 Restoration Team at the Computer History Museum, I can assure everyone that this vendor doesn't have a clue (or is a fraud). I thought at first that he made a typo in the title - but no, he also restated "PDP-1" in his "RARE" article description statement. Sigh. Title: RARE DEC PDP 1 MEG MEMORY BOARD BY EMC CORP. Item number: 8773655976 Desc: THIS IS A RARE DIGITAL EQUIPMENT PDP ONE MEG MEMORY BOARD MADE BY EMC CORP.IT IS GAURANTEED TO BE WORKING. I'm tempted to buy it and then tell him I tried it out, and I couldn't make it "fit". ;-) Nah, that's too much work... Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

20 years, 6 months

7
9
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Items for sale/trade

by zap＠columbus.rr.com

Not exactly sure what they are worth, but I have a few older computers that are looking for a home. AT&T Unix PC (has internal HD, software loaded but don't have the passwords!) Vector Graphic Memorite system (with manual) - Not terribly common >from what I've been told Original IBM PC & Printer (both in zip up bags) I'd be glad to chat with anyone interested in these machines (trading may be considered as well). I am located in Columbus, Ohio and could ship (but these things aren't exactly light!) I will be moving soon and I just don't have the room to take everything with me, so hopefully someone is interested! -Chris

20 years, 6 months

2
1
0 0

funny: write-only-memory (WOM) datasheet

by bert＠brothom.nl

http://www.national.com/rap/Story/WOMorigin.html

20 years, 6 months

9
10
0 0

looking for a DT1050 Digitalker chip set

by paul.kowalski＠siemens.com

Hello I am a student at SJSU in CA and I am wanting to construct a talking DVM senior project. Part of the speech circuit would be using the the DT1050 kit by National semiconductor(MM54104 +ROMS for the digitalker). Do you know of any anywhere? If so,let me know.... Thanks Paul ------------------------------------------------------------------------------- This message and any included attachments are from Siemens Medical Solutions USA, Inc. and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you received this message in error, or have reason to believe you are not authorized to receive it, please promptly delete this message and notify the sender by e-mail with a copy to Central.SecurityOffice at shs.siemens.com Thank you

20 years, 6 months

1
0
0 0

My pdp-8i problem

by tradde＠excite.com

Phillipe, I am working on a project that will allow me to test many/most of my flip chips as you did. I got the idea from seeing what you did on your web site. I am hoping mine is not quite as bad off as the one you fixed. It was fully functional, and still partially is. My main problem right now is I have no memory access. I hope as have as much luck as you did. I like my 8i system, as it's what I originally learned on and finally got one of my own. Tim R --- On Wed 03/01, Philippe Sonnet < sonnet at sols.ucl.ac.be > wrote: From: Philippe Sonnet [mailto: sonnet at sols.ucl.ac.be] To: cctech at classiccmp.org Date: Wed, 1 Mar 2006 23:10:57 +0100 Subject: Re: My pdp-8i problem Dear Tim,It is very hard to answer your question. I also spent hours fixing my pdp-8/L, in which almost all circuits had to be repaired. It took me two years. The only way : use a logic probe and have a set a spare flipchips which you know are OK. I created a system to test the flipchips using a digital acquisition card on a PC (see www.sonnet.be). Collect all possible schematics, study them, have a confortable seat, stay calm and systematic and use a card extender to have better access to all the lines. Good luck,Philippe _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

20 years, 6 months

1
0
0 0

TI Travelmate

by dwight.elvey＠amd.com

>From: "John C. Ellingboe" <john at guntersville.net> > >Chuck Guzis wrote: >> >> On 3/1/2006 at 3:07 PM John C. Ellingboe wrote: >> >> >Does anyone have information on the TI Travelmate LT220/V. A >> >quick Google didn't turn up anything of value. >> > >> >I have acquired one with a pile of other items and have no idea >> >how useful it might be. The power source, 18V DC did not come >> >with it and there is no indication as to whether the center pin >> >of the power connector is the positive connection or not. >> >> Any external I/O connectors on it? Things like parallel port connections >> will usually have their ground/return pins conected to the - side of the >> power supply. >> >> Last resort is popping the box open and checking the ground plane on the >> PCB or any of the ICs (if the ground plane is buried) against the >> connector. >> >> Cheers, >> Chuck > >I haven't opened it up yet but there is a 9 pin jack on the >side, maybe a serial port. It also has a modular connector >which may be a modem connection. The other side has a large >connector behind a hinged cover that looks like it may be a bus >connection for expantion or connection to some special >equipment. > >John Hi John The point is that it is unlikely that the 18 volts will go to one of these connectors but the ground lead will most likely be there and Ohm at zero Ohms between connectors. The other 18 volt lead will most likely be the positive. Dwight

20 years, 6 months

1
0
0 0

an odd PC seen in a thrift store (?)

by chrism3667＠yahoo.com

the talk of a peculiar USR pc made me remember this. There used to be a (primarily) electronic junk store in LI called Eldies (Edlies?) on Hempstead Tnpk in Levittown I guess. Sitting there one day was an all in one, IIRC, NCR unit that booted up to an a:> prompt. It struck me as a weirdish dos semi compatible. It didnt strike me as a PC4 or the nearly identical Decision Mate (cpm). Pretty sure it was NCR, but eh maybe it was NEC (definately NOT an APC, not quite that big and heavy). Anyone have a clue? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

4
6
0 0

Floppy-Disk-Drive ...

by ADVolkov09＠aol.com

Hi Mr. Hoke, I saw your posting on the web about installing an old 5 1/4'' Floppy on a new PC. I got the same floppy ( TEAC FD-55GFR ) and would like to know whether you succeeded in the end, and how you jumpered your drive. I get an E/A-Error message from WindowsXP whenever I try to click on the drive in the Explorer ... but XP at least recognizes it as 5 1/4''-floppy. Regards. Alexey. Hi - I am trying to install a Teac FD-55GFR 5 1/4" drive into a Pentium 200 mhz computer. Upon trying to read the drive I get a "General Failure Trying To Read Drive A" error message. I have the drive connected to the end of the ribbon cable, and the drive is designated as drive A. Also, I noticed that there are some switches (I forgot what they are called - upright posts where you couple a pair together using a U-shaped something or another) on the bottom of the drive. How should these switches be set? Also, could my problem be that I am not using a correct BIOS? Thanks for all of your help.

20 years, 6 months

1
0
0 0

My pdp-8i problem

by tradde＠excite.com

I was hoping someone on this list might have some input on this. I have also posted this to alt.sys.pdp8. I have a pdp-8i with a memory problem. Here is the post from alt.sys.pdp8: Quite some time back while scoping out a problem I shorted a pin in my 8i backplane and lost memory control. Since that time Vince and I have been trying to figure out where the problem is to fix it. I don't know what pin I shorted as at the time I did not realize I had damaged anything. The +5v breaker tripped though. The problem is I can not deposit or read back any memory locations. The MB is displayed correctly on a deposit. Scoping signal has shown me a very odd signal on B FIELD 0 (1) when the machine is in run mode. It has a wave form on it rather than just a normal voltage. The oddest thing is the high point of the wave goes up to +6v with a bit of the beginning of the top portion going above +6v. To me this should not be. How can I get +6v from a system that is using +5v as it's input voltage? We have some theories but nothing concrete as yet. The other thing is if I remove all 3 G228s (A36, B36, B37) the signal goes away. I do not have parity memory so nothing is in A37. We believe there is a bad ground somewhere, but I have not been able to determine where. I do not have a wiring list so I may have to trace some signals manually. I think I have to find all the places the B30L1 (B FIELD 0(1)) goes to. Any ideas or suggestions from anyone? This has been bugging me for a long time. I look at it for awhile, and then put it down for awhile. It's also not easy to look at this in the location it is in. It's too low to kneel and really be comfortable. Too high to lay on my stomach. :) Thanks for any input on this. I should say that part of the system still works. Examining or depositing memory while it does not appear to load/store the data increments the PC as it should. I can sort of run, which was my original problem. It runs but stays at location zero. It is not an interrupt causing this. So the front panel is mostly operational so at least some of the machine is still working. I just have to find the problem with the memory. I know most people on this list do not have a pdp-8i, nor may know much if anything about them. Any suggestion will be taken and looked into if it seems to have hope of leading to a solution. Also I will answer any questions people have to help describe the problem more or give more details into what Vince and I have looked at. Tim Radde _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

20 years, 6 months

2
1
0 0

Computime S-100 card docs?

by rigdonj＠cfl.rr.com

Can anyone help this guy? >From: Gary E Kaufman <gkaufman at the-planet.org> >Subject: Computime S-100 card docs? > >A long shot - I found your old message on classiccmp.org. Any chance you >located docs for the Computime UFDC-1? I have two of the boards but have >lost the docs. > >Many thanks! > >- Gary > >

20 years, 6 months

1
0
0 0

Google Video and old computers

by innfoclassics＠gmail.com

Discovered on the new "Google Video" tapings of the Computer History Museum Meetings, like "An evening with Steve Wozniak" Jan 12, 2006. For more search Google Videos for Computer History Museum. Some good National Historical Archive stuff too.... like the moon landing. Found under google picks. Plays fine on my Ubuntu Linux box, too. -- Paxton Hoag Astoria, OR USA

20 years, 6 months

2
1
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FREE: 2x DECstation in Melbourne, Australia

by classiccmp＠popcorn.cx

Greetings, I have a pair of DECstations and related parts that I don't forsee doing anything with in the near (or distant) future: * Complete DECstation 5000/133 with display, mouse and keyboard that powers up but has no OS. * DECstation 2100 system unit only. Unknown condition. * Storage expansion unit with one hard drive * Three other DIGITAL mice NIB (maybe for the 2100) * Another DA-15 to keyboard/mouse cable for the 5000 * Ethernet tranceiver Photos can be found at: http://popcorn.cx/computers/digital/decstation2100/ http://popcorn.cx/computers/digital/decstation5000/ Pickup is from Glen Waverley, preferably early evening later in the week. I hope someone else can get better use out of them than I have. Thanks, Stephen

20 years, 6 months

1
0
0 0

David Ahl's VCF plan got even better today!

by news＠computercollector.com

Update to the previous update which was an update as well: David said that after his speech, he'll auction an original copy of the first edition of "Basic Computer Games" and also the first 12 issues of "Creative Computing" magazine, with the money going to charity. ----------------------------------------- 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, 6 months

1
0
0 0

2111 256x4 SRAM chip width?

by jcwren＠jcwren.com

Does anyone know if a 2111 256x4 SRAM is a 0.3" or 0.4" wide package? I've found a datasheet, but it doesn't list the actual width. It refers to a package type that I can't find any data one. Thanks, --jc

20 years, 6 months

2
1
0 0

Panasonic RL H1400 handheld computer

by ard＠p850ug1.demon.co.uk

Can anyone tell me useful stuff about the Panasonic RL H1400 computer? I believe it was also sold under the Quasar brand name. I've just bought one. As well as the machine (which I've not tested yet), I got a little thermal printer/cassette interface, the AC adapter (for 110V mains), and 13 EPROMs in carriers. These seem to be insurance programs (what a suprise -- NOT), but are at least UV-erasable EPROMs. A few things : I have of course taken it apart, it is painful to dismantle with wires soldered between everything. The contemporary HP machines are a lot nicer to work on. With the bottom cover removed, you see the component side of the CPU board. I recognise the 6502 processor, some TTL and 4000-series CMOS chips, 2 8K ROMS soldered in, and 2 6116 (2K each) SRAMs. There's also a square PQFP chip, looks to be custom (I/O???). Alongside that board is a 6V NiCd pack with a fuse in series. A bit more desoldering and unscrewing let me flip that board out of the way. On the underside is another TTL chip and a lot of SMD passives, etc. The other PCB carries the keyboard contacts, the display, half-a-dozen Epson PQFP chips (display drivers?) and a couple of 4071s, which IIRC are OR gates. There's an expansion connector on the end of the CPU board. 44 contacts. Looks to be the 6502 bus + power some others. The printer also comes apart from the bottom. Its PCB contains a 4K ROM, an 80 pin PQFP ASIC, a driver chip, and a few small logic chips. Getting ito the rest of the machine is a bit more tricky, all it contains is the printer mechanism and 4.8V-worth of NiCds. I also cracked open the mains adapter.More complicated than I thought, there's a regulator chip in there. And a fuse mounted in clips (what is the point of a clipped in fuse inside a glued case??). Anyway, I've done a web search. Nothing very useful turned up. I did read a user manual on one site, which told me little that wasn't obvious. Anyone got any technical information on it? Any useful software? -tony

20 years, 6 months

5
10
0 0

CADO computers

by gksloane＠hotmail.com

I'm looking for Cado computers - I used to work on them, even still have a Cadol-II decompiler. Got any Cado hardware for sale/trade? Gary

20 years, 6 months

1
0
0 0

Data Books creeping their way online

by legalize＠xmission.com

A while back I asked if anyone had an interest in my vintage (early 90s) data books. With librarything, I've decided to add them to my library by scanning the covers and creating entries for the databooks. Each of these entries is tagged "data book", with title, year and manufacturer for each one. I'll be adding the remainder of the 12 linear feet of shelf space over time. So if you see something there that you'd like more information about (chips covered, maybe scans of the table of contents), let me know. <http://www.librarything.com/catalog/legalize> -- "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, 6 months

1
0
0 0

Compaq Portable II Rom N3

by redodd＠comcast.net

Hello All, I have a nice Compaq Portable II that I just put a 1.44 3.5" drive into and now I see that the tech manual says that I need the upgrade rom N3 to see the drive. Any chance that anyone has this rom image or knows where to find it? Thanks a lot. Ralph

20 years, 6 months

1
0
0 0

Paper tape

by aw288＠osfn.org

I glommed onto a good deal of new canary 1 inch paper tape in rolls (about nine inch diameter), for Teletype ASR 33s. After taking what I want, I would like to trade the rest for unused punchcards or other mainframe debris. Enquire within. William Donzelli aw288 at osfn.org

20 years, 6 months

1
0
0 0

SGI Indyzone CDs + older SGI demos

by pete＠dunnington.plus.com

I was out of reach of emai when this was posted, but if anyone's still interested... On Feb 17 2006, 8:34, Lyle Bickley wrote: > On Thursday 16 February 2006 20:49, compoobah at valleyimplants.com wrote: > > I have the IndiZone 3 CD- Don't know what the legal status is but as they > > gave them away for shipping . . . Another thing that would be nice to have > > would be IDO 4.1 for some of the older 4D IRI. > As soon as I get out from under a bunch of "real business" work, I'll check > with SGI on this matter. I have still have a few good connections internally > at SGI, so it's at least worth a shot. I have all (?) three Indyzone CDs (Tales From The Indizone, 5.2 edition, 812-8102-002, August 1993; Awesome Power In The Indyzone^2, Summer Edition 1994, 812-8111-002; and Final Impact In The Indizone^3, December 1995, 814-8111-003), and IDO 4.1.1 5/93, 812-0017-006. I also have lots of HotMix CDs. My website hasn't enough capacity for even one complete image, alas. But if anyone in the UK has a suggestion, I might loan them. -- Pete Peter Turnbull Network Manager University of York

20 years, 6 months

1
0
0 0

FREE: 2x DECstation in Melbourne, Australia

by classiccmp＠popcorn.cx

Greetings, I have a pair of DECstations and related parts that I don't forsee doing anything with in the near (or distant) future: * Complete DECstation 5000/133 with display, mouse and keyboard that powers up but has no OS. * DECstation 2100 system unit only. Unknown condition. * Storage expansion unit with one hard drive * Three other DIGITAL mice NIB (maybe for the 2100) * Another DA-15 to keyboard/mouse cable for the 5000 * Ethernet tranceiver Photos can be found at: http://popcorn.cx/computers/digital/decstation2100/ http://popcorn.cx/computers/digital/decstation5000/ Pickup is from Glen Waverley, preferably early evening later in the week. I hope someone else can get better use out of them than I have. Thanks, Stephen

20 years, 6 months

1
0
0 0

ebay and money orders

by dgriffi＠cs.csubak.edu

A while ago there was some talk about Ebay and not wanting to use Paypal there for assorted reasons. Since I'm a relative newcomer to this list, I figured I should wait before saying anything along these lines. So... I'm in the business of selling classic computer stuff on Ebay under the ID of "frotz661". See if you can guess the hidden references in that name. Anyhow, I let some people talk me into accepting money orders. Then I got burned by people who like to wait forever, money orders from Bumpassville Supermarket, and so on. So I decided not to accept them anymore. You guys seem to be a more reliable bunch, so if you email me ahead of time, I'll accept a US Postal money order. -- David Griffith dgriffi at cs.csubak.edu

20 years, 6 months

7
7
0 0

keyboard activation

by chrism3667＠yahoo.com

would it be accurate to say that a unit, such as my Mindset II, which has the power switch built into the keyboard turns the system on by asserting the power-good signal (when the switch is activated)? I know from the Byte article that an 8042 supervises the keyboard (same or similar to the IBM PC/AT). I was thinking I could tie something? to +5 volts in an attempt to determine if my pos even works. And how far is it from reality to suggest all pc kbs are the same except for their 8048/9/8748/9 programming? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

2
2
0 0

Various items I have to sell/trade

by nospam212-cctalk＠yahoo.com

I've added a page to my website where I am posting things I have to sell or trade. Currently have a microVax 3100, DEC Storage Expansion, HP 9836, Sun 3/80 and Sun SparcStation 5. I'll be adding items as I sort through things. Just don't have the time to give these the attention they deserve so hope I can find others who can. Most are in an unknown condition. You can find it at: http://www.trailingedge.com/selltrade.html David

20 years, 6 months

2
4
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Control Data Items

by joel.bradley＠comcast.net

Hi all- We are getting ready for a newborn in my house and I uncovered the following items which I would like to sell. I would like them all gone preferably to one individual, so make me an offer I cannot refuse! Pictures are available upon request. 11 binders (Grey and navy with CDC logo, ranging from 1" to 3" size.) 1 Yellow binder, labelled "CDC Cyber 70 Computer Systems" 1 Control Data Stapler (works!) 1 long sleeve shirt w/collar. The turquoise shirt has been worn/washed, as it was used for career fairs by the recruitment team. Joel

20 years, 6 months

2
1
0 0

Various items I have to sell/trade

by micheladam＠theedge.ca

Looks like you have to 'refresh' the page after selecting which item you want to look at. Then the image is displayed correctly. That is when using MicroLimp IE ... Michel ----- Original Message ----- From: nospam212-cctalk at yahoo.com Date: Monday, February 27, 2006 1:21 pm Subject: Re: Various items I have to sell/trade > Odd, they're all showing the correct picture to me... > hmm... > > And I'm not sure why you think my email is a bogus > address. > > David > > --- Richard <legalize at xmission.com> wrote: > > > > > They all have the same picture.... I'd have replied > > personally, but > > it looks like you're using a bogus address. > > -- > > "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, 6 months

2
1
0 0

MS-DOS 2.0 and "semi compatibles"

by CCTalk＠catcorner.org

I just imaged a disk of an MS-DOS compatible computer (Tandy 2000). Does anyone here know the magic number of an exe under ms-dos 2.0? I had assumed that it was MZ, like current exe files, but I only see 2 or 3 occurrences of this in the entire data stream from the disk. On the plus side, I see LOTS of strings that tell me I have actually read the contents of the disk (this machine used DS/QD drives). Here are some examples: Licensed to Tandy Corp. BIOS version 01.00.00 Copyright 1983 Tandy Corp. All rights reserved. MS-DOS version 02.00.00 Copr. 1981,82,83 Microsoft Corp. I'm guessing I need a good hex editor to look at the directory and offsets to see if they jibe. Any good windows based hex editors (or at least viewers) that anyone can suggest? I'll send the same message to 'classiccmp' Kelly

20 years, 6 months

5
4
0 0

Data General on govliquidation site

by bobalan＠sbcglobal.net

If anyone is interested, I found what appears to be a DG powered test system on the govliquidation site: http://cgi.govliquidation.com/auction/view?id=794618 The tape drive is DG and the card cage looks like my Eclipse system, but I don't know what processor it really is. It's in Oklahoma City and weighs 1740 pounds so won't be cheap to ship. Bob

20 years, 6 months

1
0
0 0

Those Epson disk drive motors again

by marvin＠rain.org

The problem of leakage is certainly not limited to this stuff. Back when I was making PC boards, I made some boards for a company, and they told me they were no good. So I took a trip up to their place (very nice nice, a couple of hundred yards from the Pacific Ocean.) These were high impedance circuits, and IIRC most didn't work. I had already made *sure* the boards were clean when they were sent since this was a new customer and the second time it happend. Some of you already know the answer by now ... the salty air from the Paficic created the problem. > Well, one came back to bite me. > isolated track to the nearby 9V supply to the CX065B chip. I took out a > few more components to get to the PCB surface, then really cleaned it up. > And then I was getting over 30M leakage. > > Put everything back, and it seems to work.... > > -tony

20 years, 6 months

1
0
0 0

RT-11, "PDP-11 FORTRAN-77 User Manual"

by henk.gooijen＠oce.com

Hello Lyle, I have the following manuals (on paper). PDP-11 Fortran-77 Documentation Supplement AA-JQ94A-TK June 1987 Fortran-77 Version 5.2 PDP-11 Fortran-77 Language Reference Manual AA-V193A-TK July 1983 Fortran-77 V5.0 (I have this one twice, so for postage, it's yours) PDP-11 Fortran-77/RT-11 User's Guide AA-BR70A-TC Operating System: RT-11 V5.1 Fortran-77/RT-11 V5.0 (Adapted from PDP-11 Fortran-77/RSX by Multiware, Inc.) PDP-11 Fortran-77/RT-11 Object Time System Reference Manual AA-BR71A-TC March 1984 PDP-11 Fortran-77/RT-11 Installation Guide/Release Notes AA-BR72A-TC March 1984 All together they are a thick orange binder, so if I must scan please tell me which ones. I will probably split them up in chapters, because at 600 dpi (256 greylevels) they will be many Mb's in size. Funny, I did not even know I had the RT-11 Fortran-77 doc of Multiware, as recently discussed in a thread! - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Lyle Bickley Verzonden: ma 27-02-2006 03:41 Aan: Al Kossow CC: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: RT-11, "PDP-11 FORTRAN-77 User Manual" On Sunday 26 February 2006 18:31, Al Kossow wrote: > I should have this scanner. BTW: The name of the manual may be RT-11, "PDP-11 FORTRAN-77 User Guide" ("Guide" as opposed to "Manual" in my prior email). 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, 6 months

2
1
0 0

RT-11, "PDP-11 FORTRAN-77 User Manual"

by lbickley＠bickleywest.com

If someone has a copy of the RT-11, "PDP-11 FORTRAN-77 User Manual" I'd like to borrow it to make a copy (and lend it to Al Kossow to put it up on bitsavers.org). Version 5.x would be perfect. I'll be glad to pay for shipping both "ways". If you have a PDF of the manual that would be even better. Please let me know where I can download it - or I'll give you a private FTP address to upload it. Thanks, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

20 years, 6 months

2
2
0 0

"P-Source" book / UCSD P-system I.5 docs

by philpem＠dsl.pipex.com

Hi, Does anyone have a spare copy of the book "P-Source: Inside Apple Pascal" by Randy Hyde (pub: DATAMOST), or any low-level info on UCSD P-system I.5, especially the 'Version I' pcode interpreter? I'm trying to port the UCSD P-System onto my homebrew 6502 computer, but that's a little difficult without any documentation on the P-code interpreter itself. Ordinarily I'd just buy a copy of the book off Amazon, but ?65 plus P&P with a six-week wait for delivery is downright outrageous... Thanks. -- Phil. | Kitsune: Acorn RiscPC SA202 64M+6G ViewFinder philpem at dsl.pipex.com | Cheetah: Athlon64 3200+ A8VDeluxeV2 512M+100G http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700 256M+40G

20 years, 6 months

1
0
0 0

Test, ignore

by news＠computercollector.com

Changing my email config, just ignore this please.

20 years, 6 months

1
0
0 0

Stupid eBay user du jor

by news＠computercollector.com

Advertisement # 5869045519 The title is "1st Palm Computer" ... the item is a Psion Organiser II. I understand that no one will dig like I have about the history of handhelds ... but geez, the only research this doofus had to do is to read the big letters on the cover of the instruction manual ... Where it says "II" as in "not the first." :) I kindly pointed this out in a message to the seller (sans the "doofus" part.) The seller's reply tonight was "Get a life!!" Darwin must've missed that house. ----------------------------------------- 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, 6 months

12
19
0 0

Those Epson disk drive motors again

by ard＠p850ug1.demon.co.uk

A couple of days ago I mentioned I'd discovered a workaround for Epson SD320 or SD321 spindle motors that stopped after a few seconds because the protection circuit was tripping... Well, one came back to bite me. I spend the afternoon looking at the other drive in the TF20. I'd changed the resistor I mentioened and put the motor back in place. Hooked it up to the bench supply, and would you beleive it stopped after a few seconds. So out it came again. The bare motor stopped after a few seconds too, and the protection cicrcuit was certainly being triggered (the base of Q33 was at about 0.6V). I noticed a leaky electrolytic, so I changed that, no improbement. So I decided to totally disable the protection circuit by removing the 300k feed resistor. You guessed it, the darn thing still triggered, there was still 0.6V on the base of Q33. All that's connected to that point are a resistor to ground (the one I'd reduced to 56k), a capacitor to ground, and the base itself. I removed all 3 components. OK, the mtoor now ran (so the rpoblem was in the protection circuit). And there was nearly 9V on the base connection for the transistor -- a point that had noting connected to it. You guessed it. some of the gunge from the faulty capacitor was causing electrical leakage on the PCB. I could read 100k of resistance from the isolated track to the nearby 9V supply to the CX065B chip. I took out a few more components to get to the PCB surface, then really cleaned it up. And then I was getting over 30M leakage. Put everything back, and it seems to work.... -tony

20 years, 6 months

2
2
0 0

Hamfests

by chrism3667＠yahoo.com

are these at this point in time still any good for procuring puter gear of a vintage nature? I used to see loads of stuph out on Lawnguylind (when it wadnt all that interesting) at these events. Ham dudes are real packrats. Now it doesnt have to be a whole systen necessarily. Sometimes components - monitors, video cards, whatever - could be just as groovy. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 6 months

5
6
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