test-drb July 2003

test-drb@ccmp.vtda.org

279 participants
450 discussions

by jim＠q107fm.com

Hi Chris; I could use a schematic for a Bogen CHS-100A. If you have it could you email it to me? Jim Offerdahl mailto:jim@q107fm.com Pine to Prarie Broadcasting, Inc. KKCQ AM&FM/KKEQ FM PO Box 606 Hiway 2 East Fosston, MN 56542 (218) 435-1919 [demime 1.01a removed an attachment of type application/ms-tnef which had a name of winmail.dat]

21 years

Looking for docs : Daisy wheel printer Qume LetterPro 20s

by jph＠stephenson.net.dhis.org

Hello, I am looking for documentation about the daisy wheel printer Qume LetterPro 20s (Sprint 12/25) with RS232 interface. especially the control codes. Thanks in advance for all advices. J.-P. Hofer

21 years

Acorn (Was Re: Reading PDP-8 paper tapes)

by gtoal＠gtoal.com

> I have a couple of Acorn Systems (one 6502, the other 6809-based). I am > always looking for any of the more unusual I/O cards for them.... OK, refresh my memory here... what Acorn 6809 system would that be? I was only aware of two - one by Brian Jones which was a large hand- made breadboarded circuit he did as an experiment, and which ran FLEX, and one that I made which was a BBC second processor - *both* of which I have here at home. I don't remember Acorn making any production 6809 systems??? I have the original circuit diagram on tracing paper that Brian drew. My own was so simple (5 packages as I recall) that I didn't bother drawing a diagram :-) [I just worked from an ascii wiring list] I did two versions - the first was CPU TUBE ls139? (some single ttl chip for address decoding the tube) 2*32K 'greenwich instruments' battery-backed static rams I pre-loaded the static ram on a beeb with the boot code, so didn't need an eprom at all! the second was CPU TUBE Eprom 64K dynamic ram SIL (first SIL I ever saw!) Custom dynamic memory controller IC I was working on VLSI design tools at the time, and I designed the memory controller chip as my test piece. It was a PLA and a counter for ram refresh, not much else. [I found a 'work in progress' kernel source for my 6809 2nd proc earlier this year - written in Skimp, which was a compiler I had written myself as a University project; the compiler itself was written in the Edinburgh language Imp77 - Acorn actually had commissioned Imp77 compilers for both the 32016 and the ARM - and we recently found the full sources of the 3L ARM Imp (and Pascal) compilers at Edinburgh as part of our Edinburgh Computer History Project research!] It would have been a tremendously cheap second processor to build but Roger was quite set against the 6809 on the sole argument of clock speed. My argument was that it was a nicer processor and would have more high-level software than the 6502. Probably was true at the time although the 6502 did eventually get a whole slew of high level languages that I never would have thought possible. (I shared a house with the guy who worked on the Pascal compiler who I would occasionally give gratuitous advice to, and I also learned C while doing SQA of the C compiler) (quickly checks the web...) Well! http://www.stairwaytohell.com/atom/adverts/FLYER_Acorn_6809.png Never seen it in my life. It must have come and gone before I joined Acorn (I forget the year but it was post Beeb but pre-Electron) Other obscure Acorn kit that I have: the "Prophet" - a version of the Atom targetted at businesses. Never seen a single mention of it on the net. I have the Z80 second processor, various ARMs, I think a 286, a few 32016's - and a working ACW although it was having Beeb-side problems last time I tried it. Some day I'll photograph my acorn goodies and let you know what's available. Any cards I can put in a padded envelope and mail to anyone are fair game; the larger systems like the System 4 filestore and the ACW I'll be hanging on to. The atoms and electrons I could be persuaded to part with though they're easy to find anyway and I doubt you'd want mine. If anyone in the US has an Amercian Beeb (110V and NTSC) I'll be all over them to trade :-) - it would be a real boon for recovering the data from my boxes of 5.25" disks... Another project I did at Acorn was design a system for backing up hard discs to video tape. It used the teletext video chips (SA5050? - one of those SA chips anyway) to generate/decode a video signal. The actual board design was done by a new engineer who had been hired (Martin Gilbert) and was being broken in gently before being given any serious work. Hugo (file-system author) did the software. I believe the prototype actually worked but like most of my stuff at acorn it never made it to market :-/ Despite not contributing greatly to the financial success of Acorn, I have to say however that good times were had by all... it was definitely the best place I ever worked. G PS My main 'beeb' project before I transferred to VLSI CAD was the Teletext adapter. I found the source code recently if anyone wants it. I can't see Acorn giving me a hard time over releasing it after all these years...

21 years

iUP-201 PC software

by T.Shaw＠corp.amc.edu.au

Hi Robert I found your request for modules for a iUP201 Universal Programmer. I have just dusted off a iUP-201 we have had sitting on a shelf for as long as anyone here can remember. I cant help you with modules but I would be very grateful if you could help me with software to drive it from a PC. I need to use it to read the contents of a 2732 EPROM from an engine volume generator I hope to update. regards Tim Shaw T.Shaw(a)corp.amc.edu.au Senior Technical Officer (Elect) +61-3-63354805 Ph Technical Services +61-3-63266493 Fax Australian Maritime College www.amc.edu.au

21 years

PDP-11 Freeware CDs for RSX-11 and RT-11 (Originally Produced by Tim Shoppa)

by jhfinexgs2＠compsys.to

In regard to the Freeware CDs for RSX-11 and RT-11 that Tim Shoppa originally produced: I am in the middle of finishing a third (very small) batch of CDs and could easily add a few additional copies. I will be making all copies of the CD images from: ftp://ftp.trailing-edge.com/pub/cd-images/ http://www.classiccmp.org/PDP-11/RT-11/ http://www.classiccmp.org/PDP-11/RSX-11/ Since not everyone has both a high speed internet connection and a CD burner, I thought it would be helpful to make them available. If you have both requirements and are using Windows 98 SE / Nero Burning, I can help with the details if you don't know how to burn a CD from an "Image File". I have even been able to produce a label for each CD that is close to the original label from Tim Shoppa, although since they were scanned (THANK YOU FOR THE HELP), they are not perfect. They are available at $ 5 / $ 9 / $ 12 for 1 / 2 / 3 CDs. In addition, I understand that Memorex Black CD-Rs have a longer shelf life and are available at Business Depot. If anyone wants those instead, add $ 1 for each CD that you are requesting. Thus those amounts are $ 6 / $ 11 / $ 15 Please contact me directly for my snail mail address. I picked up some Memorex Black CD-R blanks and started on the copies for those who have already requested that a Black CD-R be used. Please include your mailing address!!!!!!!!!!!!!!!!!!! In general, I will regard any funds you send as a gift so that if anyone really can't afford the CDs, please state why that is so. Outside of the US, probably about $ 2 should be sufficient for extra postage. All amounts are in US dollars. Please ask if you are not in the US. No point in converting twice. In addition, probably most people do not follow the exchange rate between the Canadian / US dollar, but the current rate is MUCH less favourable. If a 4th batch is ever made, the amounts to be sent will need to be changed. I will keep the amounts the same this time, but the $ 12 will become $ US 14 and the $ 15 will become $ US 18 based on the current exchange rate and adjusted at the time if the exchange rate changes again. 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.

21 years

8250 LP Double disk drive for the commodore 64

by semlj001＠hotmail.com

The drive on http://www.zimmers.net/cbmpics/deieee3.html is what I'm looking for. I've had a chat to my dad who's said that the technician said it could be one of 2 things. 1. The head moves & is attached to a wire. A connection in the wire could be faulty. He said that fixing the wire was niot an option for some reason or other but I guess we could replace the head. Can I replace the head with one from a different model? If so, which are compatible? 2. There are 3 main chips on the mainboard which seemed to be running hot. The guy replaced 2 but didn't have one to replace the 3rd. I have been chatting with another guy who has said that the 8250 drive is functionally the same as the 8250 LP so if anyone reading this has either for sale please let me know. Lance. ----Original Message Follows---- From: Ethan Dicks <erd_6502(a)yahoo.com> Reply-To: cctalk(a)classiccmp.org To: cctalk(a)classiccmp.org Subject: Re: Fwd: Re: Fwd: Re: 8250 LP Double disk drive for the commodore 64 Date: Wed, 2 Jul 2003 20:03:41 -0700 (PDT) --- Lance S <semlj001(a)hotmail.com> wrote: > Ethan, I'll find out the part that the technician thought was suspect. > If I haven't explained myself clearly enough, the 8250 LP is a double > disk drive that connects to a commodore 64. > > Thanks, > Lance. Looks like this: http://www.zimmers.net/cbmpics/deieee3.html Right? We are all talking about the same thing, but the drive by itself hooks to a PET. Your father must have a cartridge for his C-64 that provides an IEEE-488 port. One possibility is if you can't find an 8250LP is to get a regular 8250 (using the same connection). Dunno if an SFD-1001 would work or not... the DOS is not the same, so if your father's application depends on certain features of the drive itself, it might or might not be a reasonable substitute. There was a discussion about 8250LP repair on the CBM-Hackers list last year. This article is interesting: http://www.softwolves.pp.se/misc/arkiv/cbm-hackers/6/6731.html It suggests that the "fragile" part is a 6530 - a part made by Commodore that was always customized for its particular application. I've seen them on the KIM-1, in many Commodore disk drives and a few other places. Apparently some drives (perhaps the DOS 3.0 ones) used a daughter card in the 6530 socket with a 6532 (which is generic) and an external ROM. Dunno what's wrong with your father's drive, but if you can get in front of it, turn it on and watch for flashing lights. In many cases, that can narrow down the problem to a few chips. If it doesn't flash at all (i.e., it acts totally dead), that helps, too. Likewise if you can power it on, "talk to it" (read the error channel), but not read or write drives. Depending on the fault, it might actually be easier to fix than replace. Most "technicians" these days only know how to swap out entire boards or entire boxes. If it _is_ a 6530, that's kind of a problem... It's theoretically possible to fabricate a replacement, but I'm not sure the CBM community knows enough about that particular model to describe a functional replacement. A 4040? Sure. Maybe even an old-fashioned 8250. Not positive about the 8250LP. Cheers, -ethan _________________________________________________________________ Hot chart ringtones and polyphonics. Go to http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=174&refer…

21 years

Fwd: Re: Fwd: Re: 8250 LP Double disk drive for the commodore 64

by semlj001＠hotmail.com

Ethan, I'll find out the part that the technician thought was suspect. If I haven't explained myself clearly enough, the 8250 LP is a double disk drive that connects to a commodore 64. Thanks, Lance. ----Original Message Follows---- From: Ethan Dicks <erd_6502(a)yahoo.com> Reply-To: cctalk(a)classiccmp.org To: cctalk(a)classiccmp.org Subject: Re: Fwd: Re: 8250 LP Double disk drive for the commodore 64 Date: Wed, 2 Jul 2003 18:20:47 -0700 (PDT) --- Lance S <semlj001(a)hotmail.com> wrote: > The reason that I'm looking for it is that my father has been using his > 8250 to run some software and his has broken. He's had a technichian > look at it and some parts are needed. It would be easier to buy another. What parts? Drives? Power Supply? Main board? The main board is about the only thing that really is hard to replace. I don't know what specific disk drives shipped with the 8250LP, but if it's the drives themselves, it's probably possible to find an equivalent. > As I understand, 1541 drives read / write in a different format to the > 8250 drives. You do have the nub of it. Completely incompatible. > The 8250 is able to write 1Mb to each disk which I don't think > the 1541 can do. The 1541 has half the tracks and half the heads (and less than 25% total space per diskette) Good luck in your search. All of my PET hardware is older than that. I have never even seen one up close, but they are out there. -ethan _________________________________________________________________ Hotmail is now available on Australian mobile phones. Go to http://ninemsn.com.au/mobilecentral/signup.asp

21 years

5.25" SMD drives

by aek＠spies.com

The manual for Segate/CDC's 41097J (97500-11G) and 41201J (97500-12G) is now up at www.spies.com/aek/pdf/seagate/83327290-A_ST41097J_SMD.pdf Thanks to Dave Jenner for the original.

21 years

Fwd: Re: 8250 LP Double disk drive for the commodore 64

by semlj001＠hotmail.com

The reason that I'm looking for it is that my father has been using his 8250 to run some software and his has broken. He's had a technichian look at it and some parts are needed. It would be easier to buy another. As I understand, 1541 drives read / write in a different format to the 8250 drives. The 8250 is able to write 1Mb to each disk which I don't think the 1541 can do. Lance. ----Original Message Follows---- From: Ethan Dicks <erd_6502(a)yahoo.com> Reply-To: cctalk(a)classiccmp.org To: cctalk(a)classiccmp.org Subject: Re: 8250 LP Double disk drive for the commodore 64 Date: Wed, 2 Jul 2003 11:06:55 -0700 (PDT) --- Gary Dean Hildebrand <ghldbrd(a)ccp.com> wrote: > Lance S writes: > > > I am looking for an 8250 LP Double disk drive for the commodore 64. > > Why do you want that drive? Maybe he has some 8250 disks to read? Perhaps some (custom?) software that needs a disk larger than a 1541 to work? > It is designed for the PET series, and has > the full blown IEEE-488 interface, which the C=64 lacks. He didn't say, but he could have one already. I have one for the C-64 and one for the VIC-20. > So you'd need the adapter on the 64 as well, and I bet they are harder to > find than WMD in Iraq.. It's possible to build your own with a VLSI I/O chip (6520/6522/6526) and a couple of buffers. That plus a ROM is what's on my VIC-20 IEEE adapter. IIRC, the drivers are a 75160/75161 pair, but there are a couple of options. AFAIK, there is firmware for _some_ IEEE adapter on funet. Not sure which one without looking. > I'd just get a couple of 1541's and daisy chain them together on the > port, along with the printer or printer adapter. If you're wanting > double sided disks, then go with a 128 and 1571 drives, and then you can > play cp/m as well. If he wants to move up to a 128, that would work. Personally, I _have_ a 128, and I'm more likely to fire up a C-64 that it, largely due to experience and personal comfort. -ethan _________________________________________________________________ Hotmail is now available on Australian mobile phones. Go to http://ninemsn.com.au/mobilecentral/signup.asp

21 years

"The Mark-8 was an Intel 8008" was Re: I thought the Univac was expensive

by cb＠mythtech.net

>I have used other pics to sell something identical but I always mention >it. I >don't think that a problem generally. I agree that the simple fact of reusing pics isn't a huge issue. But he ALSO reused text... which also isn't a huge issue by itself (I bought a very nice Netopia router that simply used the info page from Netopia's web site, photo text and all). BUT... this guy slightly modified the text, in relation to the "value" of the unit. The original web site's text claimed the value at $12,000... he changed it to $17,000 on the ebay listing. So right there he is being less than honest. Also, which is the unit for sale? The Mark-8 or the 5100 precursor? The original web site seems to indicate they are two different units simply being displayed next to each other. But the ebay listing looks like it is trying to say the Mark-8 is for sale. All in all... I would have to think this is a bogus listing, or at the very least, a dishonest listing (ie: maybe there is a Mark-8 for sale, but it is probably beaten to peices and totally non functional) -chris <http://www.mythtech.net>

21 years

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test-drb July 2003