test-drb June 1998

test-drb@ccmp.vtda.org

158 participants
941 discussions

by kaikal＠MICROSOFT.com

This is not sure-fire, but I've found that if the big label on the back does NOT have the notice "contains copyrighted code..." that it's most likely an original version. Kai -----Original Message----- From: Doug Spence [mailto:ds_spenc@alcor.concordia.ca] Sent: Friday, June 26, 1998 2:01 AM To: Discussion re-collecting of classic computers Subject: Way to identify original IBM-PC? Hi, I was wondering if there's a surefire way of telling if an IBM-PC has its original motherboard, without opening the case. I saw one at the Salvation Army today and was considering dragging it home (though I decided to take another machine instead). The machine did have a cassette port in the back, with a femal DIN connector. Is this attached to the motherboard? The machine also had a full complement of cards in its slots, with lots of ports coming out of it. And a 3.5" drive that was poorly fitted into the case. I'm wondering if I should make a trip downtown sometime this weekend, with the car. Doug Spence ds_spenc(a)alcor.concordia.ca http://alcor.concordia.ca/~ds_spenc/

26 years, 5 months

principals in online selling? (was: IMSAI 8080)

by jimw＠agora.rdrop.com

At 02:51 AM 6/20/98 -0500, you wrote: >> For Sale: >> >> IMSAI 8080 Microcomputer >[...] >> Asking price: $300 > >After a round of email bidding, the seller sez: >> IT SOLD FOR $1000. THAMKS FOR THE RESPONSE. > >Somebody recently suggested that it would be better to offer stuff >directly to readers of this list rather than advertising them via online >auction. The last IMSAI that sold on eBay went for around $650, I think. > >FWIW, >Doug (still IMSAI-less) Well... while it may not improve the price, it may improve the audience... B^} While trying to NOT reignite another flame war (which I probably contribute to), the qualifier on this idea might be that when you post something, post it with an acceptable price. IMHO that should not be a difficult proposition for someone who is looking for a good home for a piece of equipment. If you are just going to relocate an auction, then you are probably only in it for the money! (boy, am I gonna get yelled at for THAT one) What really scrapes my oxide is an approach that I am starting to see more often in postings in and newsgroups. (it has happened to me twice now in the last month) Someone posts an item with an asking price. I respond to the message with a counter offer. The seller responds with a counter-counter offer that I find acceptable. I respond to the message with my acceptance and provide shipping details. The seller then responded back indicating that he has received a higher offer and that the unit has been sold without so much as an opportunity for further response. Now, maybe it is just me... But from my view when responded with a counter to my offer, we were in the midst of transacting a deal and I should have 'right of first refusal' until the point that either we make the deal or I decide I don't want it. I don't appreciate multi-thread dealing going on without being informed. And it was not like there were any extended delays between these messages. The entire series of exchanges occurred over less than 24 hours. Very similar for the second occurrance I mentioned above... BTW: a HERO-2000 auction just closed on eBay for $4027.78... (sheesh!) -jim (the obviously overly idealistic one...) --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw Computer Garage Fax - (503) 646-0174

26 years, 5 months

Older software FS

by rhblake＠bbtel.com

I have an unused and unregistered copy, complete, of Zenith Data Systems/Heath Company's "Breakthrough Timeline" which appears to be a timeline creator/project manager. It has the original box, manuals, key template, registration certificate and the original 5.25" 360k floppies (still in the envelope). From scanning the manual it's roughly 1986/87 vintage and should run on most any machine from 8086/8088 up through our present array of hardware. Really good condition visually too, might be good as part of a collection. Need $12 for it which includes mailing in the 48 CONUS states. First come, first serve. Email me direct for info. -------------------------------------------------------------------- Russ Blakeman RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144 Phone: (502) 756-1749 Data/Fax:(502) 756-6991 Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com Website: http://members.tripod.com/~RHBLAKE/ ICQ UIN #1714857 AOL Instant Messenger "RHBLAKEMAN" * Parts/Service/Upgrades and more for MOST Computers* --------------------------------------------------------------------

26 years, 5 months

XEROX 860 IPS

by cad＠gamewood.net

Hi Folks: I was donated a XEROX 860 IPS. Portrait oriented Hi-Res display, 2 8" floppies. Keyboard with a circular 'touch pad' on the right end (of the keyboard) The Problem? I was just getting to the point of trying to 'backup' the software (disks), and look around in the system, and the 12v portion of the power supply died. No 12v, no boot. Anyone have any schematics for the power supply? Chuck . -- ----------------------------------------------------------- He, who will not reason, is a bigot; William Drumond, he, who cannot, is a fool; Scottish writer and he, who dares not, is a slave. (1585-1649) While he that does, is a free man! Joseph P. 1955- ----------------------------------------------------------- Chuck Davis / Sutherlin Industries FAX # (804) 799-0940 1973 Reeves Mill Road E-Mail -- cad(a)gamewood.net Sutherlin, Virginia 24594 Voice # (804) 799-5803

26 years, 5 months

OS's In ROM's (was: Re: Mac Classic prob (was Macin

by allisonp＠world.std.com

<Yes, I agree with that one. Slight grey area here - things like the <floating point unit in the LSI11 or the CIS in the KDF-11 - are they <part of the microprocessor chipset or are they coprocessors? Depends, For the KD11 it's additional microcode. For the KDF-11 it's either more microcode(EIS/FIS chips) or a FPU (FPP-11 board). <> Byt that definition, anything built out of TTL, 2900 series, 3000 serie <> etc is _not_ a microprocessor. Those chips have uses other than for What about the 29116? It falls right on the cusp I'd say. <So I notice. But by that definition _none_ of the micro PDPs were true <microprocessors, or at least none up until the 73. The Micro J-11 <processor in the 73 was implemented as two chips on a large ceramic <carrier. Was this also the case with later J-11s? Unknown here. You forget the T-11 which was a single die and a single 40 pin chip that was used on the KXT-11 series boards (falcon etal). Allison

26 years, 5 months

720K drives on an original PC was Re: Way to iden

by manney＠lrbcg.com

Driver file? What driver file? You mean that's been my problem? manney(a)lrbcg.com > >720K drives will work fine on the original drive controller AFTER you load >the driver file. I've done it dozens of times to connect my NEC >Multi-Speed drives to the PC. The only problem is that you can't boot from >them since the driver has to be loaded for them to work. I don't *think* >the 1.44 Mb drives will work on the controller though. > > Joe > >At 01:24 AM 6/27/98 +0100, you wrote: >>> The 3.5" drive requires a special controller card that I find rare. Snag >it! >> >>My IBM XT is looking worried. It's been running fine for years with the >>original IBM controller linked to 2 360K drives and 2 720K 3.5" drives. >>And you're telling it it shouldn't work? >> >>720K 3.5" drives work fine on the original IBM controller using a >>suitable cable and not other mods. I believe drive A: should be a 360K >>drive, but apart from that there's no real problem. >> >>-tony >> >> >

26 years, 5 months

OS's In ROM's (was: Re: Mac Classic prob (was Macin

by mbg＠world.std.com

Yes, the DCT11 (t-11) is a single chip... it has no memory management (except for a strange implementation on one of the vax line... Venus, I think...) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry(a)zk3.dec.com | | Unix Support Engineering Group | (home): mbg(a)world.std.com | | Digital Equipment Corporation | | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 5 months

Xpost - Epson PX-8

by rhblake＠bbtel.com

Contact this person if you might be on the lookout for one. I had one once and it's a CP/M 8 line LCD screen laptop of sorts. ---------------------------------------------------------------------------------------------- Bjorn Langoren <bjornl(a)erols.com> Cambridge, MA 02140 - Wednesday, July 01, 1998 at 00:03:38 EPSON PX-8 for sale We found an EPSON PX-8 in the basement during a cleanup, and I thought it might be worth something to someone. I have not tried to start it up, since I don't have the power adapter for it. There is also some shrink-wrapped documentation available. Ask me questions and I will take a second look at it. Any idea how many of these were sold back in the mid 80's? ------------------------------------------------------------------------------------- -------------------------------------------------------------------- Russ Blakeman RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144 Phone: (502) 756-1749 Data/Fax:(502) 756-6991 Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com Website: http://members.tripod.com/~RHBLAKE/ ICQ UIN #1714857 AOL Instant Messenger "RHBLAKEMAN" * Parts/Service/Upgrades and more for MOST Computers* --------------------------------------------------------------------

26 years, 5 months

OS's In ROM's (was: Re: Mac Classic prob (was

by allisonp＠world.std.com

RE: T-11 <Yes, the DCT11 (t-11) is a single chip... it has no memory management <(except for a strange implementation on one of the vax line... Venus, Can't speak for venus but I've seen a MMU on the T-11 in of all places the VT240/241 which uses a T-11/ Allison

26 years, 5 months

OS's In ROM's (was: Re: Mac Classic prob (was Macin

by Philip.Belben＠powertech.co.uk

>> So, where do you draw the line? I draw it at one piece of silicon that >> can stand alone with the usual support chips (ROM, RAM, glue chips). > > I define a microprocessor as either a single chip processor, or as a > small (to be defined ;-)) number of chips which are only ever used > together to make a particular processor. Yes, I agree with that one. Slight grey area here - things like the floating point unit in the LSI11 or the CIS in the KDF-11 - are they part of the microprocessor chipset or are they coprocessors? > Byt that definition, anything built out of TTL, 2900 series, 3000 series, > etc is _not_ a microprocessor. Those chips have uses other than for > building that particular processor. But the F11 (PDP11/23) is - that > chipset only ever gets used to make an 11/23 (or an 11/24 for the pedants > :-)). > > So is the early IBM RISC 6000 processor. I seem to remember that's 8 or 9 > packages, but I would still class it as a micro. > > Other people insist a microprocessor is one chip only. I've got no So I notice. But by that definition _none_ of the micro PDPs were true microprocessors, or at least none up until the 73. The Micro J-11 processor in the 73 was implemented as two chips on a large ceramic carrier. Was this also the case with later J-11s? Philip.

26 years, 5 months

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test-drb June 1998