test-drb

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101090 discussions

by ics65＠sbcglobal.net

Does anyone know of any list, group or museum for vintage (1970s) professional Audio/Video equipment enthusiasts? Of course vintage computers were a part of some of this A/V equipment, especially for control systems. If this is off topic, any replies can be sent to my email directly ics65 at sbcglobal.net ,George

17 years, 2 months

Places to post for wanted vintage computer items?

by js＠cimmeri.com

*There's several old computer items I'm in the market for. Is this an appropriate venue to post? Any recommendations (besides here) for posting vintage "want ads"? Is it more effective to post an entire list within one post, or to have one post per item wanted? Thanks very much for any comments. jS *

17 years, 2 months

Keypunch that was on eBay

by quapla＠xs4all.nl

Hello Roger, Do you only need to convert the frequency for the motor or for the whole unit? If it is only the motor, you might look for a converter which is used for jukeboxes. Some people here in the Netherlands use a frequency converter for the motor which drives the turntable, the rest of the electronics does work without problems on 50Hz. Regards, Ed > Thanks for whoever it was who posted the info on the IBM 029 keypunch > on eBay. I have won it, nobody else bid. After it has been shipped > across the Atlantic I will have to think about converting it from 60Hz > to 50Hz. I have the remains of a 50Hz verifier which has a 240v / 50Hz > motor I should be able to use. Hopefully the rest runs on DC, so a > step down transformer before the transformers and bridge rectifiers > might be enough. Shipping costs more than the item of course. > > Anyone have any thoughts if it is worth trying the whole thing with > just a 240 - 110 transformer? If the motor burns out, not the end of > the world. > > > -- Certified : VCP 3.x, SCSI 3.x SCSA S10, SCNA S10

17 years, 2 months

The VAX is running

by bqt＠softjar.se

Richard <legalize at xmission.com> wrote: > In article <f4eb766f0904031640g7c90507eo92411f16365021e1 at mail.gmail.com>, > Ethan Dicks <ethan.dicks at gmail.com> writes: > >> > Back in the day, we used to move copies around on magtape, bypassing >> > all sorts of stream-of-bytes issues. Today, of course, most things >> > expect streams of bytes, so that's how most things are presented. > > How does magtape avoid the stream-of-bytes issue? By the simple fact that a tape is *never* a stream of bytes? Unix tries to mimic a stream of bytes on a tape, but as far as I know, noone wants that, and never uses it, instead going to the raw device, and doing all the operations a tape requires anyway. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

17 years, 2 months

DIP IC test clips

by keithvz＠verizon.net

Hi there. I'm currently using "nose pickers" (a friend at work related that pleasant name) aka XKM grabbers (http://us.st12.yimg.com/us.st.yimg.com/I/webtronics_2042_10920298) to attach my low-cost pc-based logic analyzer to some old DIP chips. They are pretty nice but when you start using a bunch in a row, they can get pretty cumbersome. I'm looking for DIP IC test clips for both 40-pin and 48-pin chips. 40-pin doesn't seem too hard to come by, 48-pin seems harder. Here's a picture of what I'm basically looking for: http://www.ap-products.com/images/tc02.gif They clip on the already socketed IC and provide square male header pins on the top of the clip to attach. These are for personal use, and I don't want to spend $100 on clips. Anyone have a line on cheap clips or happen to have any around you want to get rid of? Thanks Keith P.S. I can find plenty of online datasheets from various manufacturers but trying to find a stocking reseller that will sell them onesy twosy to hobbyists is harder.

17 years, 2 months

DEQNA/DELQA cab kits the same or different?

by tiggerlasv＠aim.com

There are no operational differences that you'll notice between a DEQNA and a DELQA cabinet kit if you're using a PDP-11. There are two extra signal lines on the DELQA vs DEQNA cables, which correspond to "Control in, circuit "A", and "B". The purpose of these, I'm not sure; maybe some sort of throttling or flow control. I doubt the PDP-11 driver uses it. Not so sure about the MicroVax. For basic operations, with a DEQNA-compatible driver, the cables should perform identically, as they are pin-compatible. T

17 years, 2 months

DEQNA/DELQA cab kits the same or different?

by Paul_Koning＠Dell.com

> I > have been told that the DEQNAs had problems and would lock up or > experience > other reliability issues. DEQNAs are not supported after about VMS > 5.4/5.5, > which is why I need a DELQA. I am not sure what the minimum VMS version > is > for DELQA though. DEQNAs never worked right, even after 12 revisions. That's why they were dumped and the LQA was created. For moderate loads a QNA should be ok, though. The big problem was that they weren't good enough for Local Area VAXcluster use, which was a big thing in those days. I don't think DECnet was thrilled with them either but DECnet was more tolerant of misbehavior. I don't remember DEQNAs being dumped by the PDP11 operating systems. paul

17 years, 2 months

DEQNA/DELQA cab kits the same or different?

by bqt＠softjar.se

"Paul Koning" <Paul_Koning at Dell.com> wrote: >> > I >> > have been told that the DEQNAs had problems and would lock up or >> > experience >> > other reliability issues. DEQNAs are not supported after about VMS >> > 5.4/5.5, >> > which is why I need a DELQA. I am not sure what the minimum VMS > version >> > is >> > for DELQA though. > > DEQNAs never worked right, even after 12 revisions. That's why they > were dumped and the LQA was created. For moderate loads a QNA should be > ok, though. The big problem was that they weren't good enough for Local > Area VAXcluster use, which was a big thing in those days. I don't think > DECnet was thrilled with them either but DECnet was more tolerant of > misbehavior. > > I don't remember DEQNAs being dumped by the PDP11 operating systems. That's because they haven't been. :-) I actually have an interesting reverse behaviour, where I can get a DELQA to freeze on my 11/93 running RSX, while a DEQNA will continue working fine. (I do suspect it is because the extra care DECnet takes to keep a QNA ticking which saves me, but anyway... Interesting...) And to answer the OP: the cab kits are the same, modulo the letters under the connector. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

17 years, 2 months

OT: Opion on Xerox 2825 Laser printer

by cclist＠sydex.com

There's a fellow in town selling a used Xerox 2825 laser printer with duplexer for $100. I'm interested because it will do 11x17. Does anyone have any experience with one of these? Worth looking at or run away? Thanks, Chuck

17 years, 2 months

PLM86 needed

by jefferwin＠gmail.com

I purchased the Godbout 85/88 card, seems to be working fine so far, although not at 5Mhz. I must have a memory card that can't handle the blazing 5 Mhz access. I am looking for a PLM86 compiler. I have the PLM80 compiler and linker/locator (if anyone needs this, please let me know) but am struggling finding the PLM86 compiler and associated linker/locator. I am currently loading code into my system via a HEX loader I wrote and sending the hex file in via the serial port >from my Mac Pro (yes, a $5000 quad-processor computer serving as a dumb terminal to my 2Mhx 8080). I want to be able to write PLM86 code and do the same for the 8088 on the GodBout card. Anyone know where I can find PLM86? Jeff Erwin

17 years, 2 months

Apollo 300 and 735 available (SW Georgia)

by cclist＠sydex.com

Just passing this information along from another forum: http://www.vintage-computer.com/vcforum/showthread.php?t=14990 --Chuck

17 years, 2 months

Looking for an Ardent Titan

by rdawson16＠hotmail.com

Hi gang, I ask every now and then here if anybody has run across one of these machines or might know sombody willing to part with one. I had one once, new, and want to go back to those days. If you help me find one, I will cross your palm with cash to feed YOUR vintage computer habit. Thanks, Randy _________________________________________________________________ Quick access to your favorite MSN content and Windows Live with Internet Explorer 8. http://ie8.msn.com/microsoft/internet-explorer-8/en-us/ie8.aspx?ocid=B037MS…

17 years, 2 months

Dot Matrix head rebuild...Anadex and others.

by jrr＠flippers.com

Anyone have any info on rebuilding the head for a regular 9-pin dot matrix printer? I have an open pin-5 coil on mine, and I would like to take it apart to see if I can repair/replace the coil, BUT I am a bit concerned about taking these things apart. Springs flying off, etc. Looking on-line does not turn up anything (so far) on dismantling these suckers. If necessary I will document it myself, but was hoping the info was already out there! The head I have is an Anadex DPH-100, and the only place on-line that shows them no longer repairs 'em! Nor did the tech I spoke to recall any details... John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"

17 years, 2 months

Free Program Listings

by billdeg＠degnanco.com

I have updated vintagecomputer.net with some new PDF's of program listings, pictures, and project notes. Bill

17 years, 2 months

OT: composite video on 1/8" connector

by slawmaster＠gmail.com

This is quite off-topic, but we have such a knowledgeable group here I thought I'd ask: I just bought a pair of MyVu Shades 301, a head mounted display system. However, I don't see the RCA connectors I was expecting, but there *is* a cable that says it goes to "standard DVD players". It has a green stereo 1/8" plug, which I assume is audio, and then a yellow two-conductor plug. I'm guessing this last one is composite video, but I'm just not sure. Have any of you seen this? I figure if I can't find an adapter at Radio Shack I can probably whip one up in a few minutes, but I wanted to get your opinions before I go messing around. John Floren -- "I've tried programming Ruby on Rails, following TechCrunch in my RSS reader, and drinking absinthe. It doesn't work. I'm going back to C, Hunter S. Thompson, and cheap whiskey." -- Ted Dziuba

17 years, 2 months

Wanted: PC11 interface

by chd_1＠nktelco.net

My PDP11/40 had a high speed paper tape reader/punch when it was new (PC04 I think). I have the hardware, but not the Unibus card. I think it failed and was replace with a Facit punch with a serial interface. So, does anybody have a M7810 they want to get rid of? That is the PC11 interface. I don't know if that is a quad SPC board or a dual that needs a M105 address board and an M7821 interrupt board. I think it needs the extra boards. Any lead or information is welcome... -chuck

17 years, 2 months

How can one test a DEC M9313 "Unibus Exerciser and Terminator" (UET)?

by ethan.dicks＠gmail.com

Hi, all, Also in the same box with the DELQA was an M9313 UET module. It reminds me that I have a loooongstanding problem with my VAX8300... the Unibus interface (DWBUA) has been a problem since I moved the 8300 to my house 15 years ago. The machine works perfectly sans Unibus. It worked in its former location with Unibus. When I first got it home, I fried the DWBUA module - literally. There was a cracked IC and a burned trace. Some sort of cabling problem. I have replaced the cables, replaced the module (so except for the paddle card, pretty much a new system), and the last time I fired it up, I didn't get smoke, but it didn't come up as a Unibus. I have all the standard install docs and such. The normal arrangement is to have either some sort of DD-11 Unibus backplane in your BA32 CPU chassis *or* have long cables off the back of the VAXBI backplane to an external BA-11 with a standard DD-11DK or DD-11CK. I have the external BA11, the same one that was used with the 8300 in its former home. The "Unibus in" spot is filled with a paddle card that accepts the 4 cables from the user-defined area under the DWBUA module. The Unibus terminator *must* be a UET. The firmware on the DWBUA looks for it. I can tell from inspecting the BIIC registers on the DWBUA that my module is unhappy somehow with the UET. I have, now, 4 UETs. I think the last time I tested things, one or two gave me different BIIC-register results than the rest, suggesting that there are actual hardware problems with one or more of my UETs. The one I found tonight has probably not ever been plugged into a backplane by me, given what else I found in the box (*nothing* in the box has been plugged in since the box came home). What would help me increase my confidence about my testing procedure is how to actually *test* a UET. I have enough different sorts of hardware that I don't think I would have to get anything new to set up any sort of software test. I have close at hand an 11/04 and an 11/750, and can lay hands on various Unibus PDP-11s and an 11/750 without leaving town. The piece of the puzzle that I'm missing (and always have) is how to test it. AFAIK, it's a terminator and several loopback registers, but the specific nature of them is unknown to me. I presume that the termination is likely to be robust and probably not faulty - it's probably a problem with a bus driver/receiver or perhaps with some sort of internal register that the DWBUA firmware is writing to or reading back. There are a number of DEC-specific ICs, a lot of 74LS parts, some Nat'l Semi and AMD parts, and a few DIP resistor packs. There's one empty 24-pin 0.6" socket (which is empty on all the UETs I've seen, so it's either some sort of option or a test plug for some other use), and no jumpers what so ever. There are nine 8641 Unibus interface chips, but fortunately, I have a stack of those from COMBOARD spares. There are five DC013s, but I have those from COMBOARDs, too (two per board, socketed, thankfully). Before anyone suggests grant jumpers, I used to make dual-height grant modules. I always populate every slot with one so I don't have to worry about NPR (and because they are easier to remove than genuine G727 knucklebusters). I could probably figure out whatever I needed to from the UET maintenance printset (which I don't have handy, unfortunately), but I'm hoping that someone on the list has some experience that goes beyond just plugging one in and seeing no errors from the system. Perhaps someone has read a Field Service bulletin that talks about this module and perhaps they remember some useful fragment of the title or has a copy of it handy. I don't *think* either the primary or secondary Unibus adapters for the 11/750 care if there's a UET or even if they can directly tell there's a UET, and that's the system I have the most experience with. There may be some simple sort of ODT sequence that I could tickle the Unibus with and see clearly that "bit 4 is stuck" or something like that. If not, reading diagnostic source could be revealing about how it interacts with the UET registers. Thanks for any helpful tips and pointers. I miss having the Unibus on the 8300 - I can run and test COMBOARDs on it, which is one of the reasons I want to get it working - so I can go through the pile of stuff in the basement and scrap out the boards that didn't work then and aren't likely to work now. I have a few VAXBI COMBOARDs still, so one "fun" thing one can do is hook any two boards back-to-back through a (synchronous) modem eliminator (one board is told to be the "central", the other is the "remote") and move files around and exercise the software by pumping bytes from one process to another - you don't "need" a second machine to demonstrate HASP or 3780 (though it can be easier to explain when data are actually *moving* from one CPU to another). -ethan

17 years, 2 months

Looking for Radius Rocket software <ahem> key...

by derschjo＠mail.msu.edu

I picked up a Radius "Stage II" Rocket, which appears to be a rather nifty "accelerator" of sorts which is more or less a second 68040 mac on a nubus card. I've found the necessary software to drive it, RocketShare 1.3.1, but it wants a serial number from me before it'll start up... I don't have the original software disks, but I'd like to think owning the physical card would grant me rights to it, since they were only sold together. Anyone out there have a serial for this they can share? (Why would software that requires possession of a $3500 card in order to do anything require a serial number? Gah...) Thanks, Josh

17 years, 2 months

vintage ads

by legalize＠xmission.com

<http://thedailywtf.com/Articles/What-the-Ad.aspx> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 2 months

Looking for manual/schematics for Microangelo MA520 S-100 card

by ragooman＠comcast.net

Anyone have a manual/schematics for Microangelo MA520 S-100 card ? All the sites that I bookmarked come up empty. I'm trying to fix the one I have here. It's also missing a chip at U5 I don't have a photo of the card either to determine the part#, just the early revision model. thanks ! =Dan -- [ = http://www2.applegate.org/~ragooman/ ]

17 years, 2 months

tractor feed supplies

by brianlanning＠gmail.com

While picking over the remains of a local office depot that was going out of business, I managed to get a 500 sheet box of tractor feed printer paper for $3 (last one). I'm surprised they stocked it. Although they had box upon box of 2, 3, and 4 part tractor feed paper, so I guess that's the target audience. All I need now are tractor feed labels for 3.5" floppy disks. Does anyone know of a good source? brian

17 years, 2 months

Keyboard Kache in Kalifornia

by marvin＠west.net

> From: s shumaker <shumaker at att.net> > What's the location for this stuff? Oxnard is about 45 minutes south of where I live. If someone REALLY wants this stuff, I could stop by to pick up the stuff and drop it off somewhere to be packed and shipped (I just don't have the time to pack and ship that much "stuff".)

17 years, 2 months

Looking for PLM86 compiiler

by jefferwin＠gmail.com

I have added an 8088 to my Imsai 8080 (using the CompuPro/Godbout 8085/88 dual processor card). I have been all over the internet and have not been able to find a copy of PL/M86 and associated linker and locator. I know they must be out there, but none of the CPM86 sites have the tools. As an alternative, I could use a C86 compiler, but the C language overhead is huge. The AZTEC C86 compiler creates about 5K of 'stuff' for a main() with no #includes that simply returns. I suspect there is a ton of DOS support stuff that gets dragged in. PLM86 is designed more for creating PROM code, which is what I really need. Can anyone out there point me in the right direction? PLM86 or a C compiler that understands the concept of PROMable code? Jeff Erwin

17 years, 2 months

I [don't] hate E-Bay (was Cromemco 68000 on ebay)

by trag＠io.com

> > Date: Mon, 30 Mar 2009 19:05:08 +0100 (BST) > From: ard at p850ug1.demon.co.uk (Tony Duell) > I don;t understnad this. How come if I put in my high bid several days > before the end of the auction does it make others bid higher? Because many of the buyers on Ebay are not rational--or at least, not what you and I would consider rational. Rather than deciding ahead of time on their maximum bid, they check the item over an over again during the auction and if they've been outbid, they enter a higher bid--usually $2 at a time, until theirs is the highest bid. If you come along and outbid them, they will do this again. If there are two of them, they'll do it to each other in a rather comical fashion (not so comical if you want the item in question). The only way to defeat these jokers is to not bid until the last moment, depriving them of the chance to come nickel and dime you to death. Even if they don't outbid you, several of their little increments will drive your price up. Remember, you don't pay your bid amount, you pay a fixed increment higher than the second highest bid amount. Of course, from a seller's point of view, these folks are (maybe) useful. Jeff Walther

17 years, 2 months

Looking for manual/schematics for Microangelo MA520 S-100 card

by ragooman＠comcast.net

17 years, 2 months

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