test-drb June 2001

test-drb@ccmp.vtda.org

273 participants
682 discussions

by mjsnodgr＠rockwellcollins.com

I've got a MCA SCSI controller that I'm not using. It came to me in a box of MCA and EISA stuff and was working when it was pulled from it's machine. I was hoping to get an EISA SCSI controller.. Hmmm... if anyone in interested in a swap.... - Micah S. mjsnodgr(a)rockwellcollins.com SUPRDAVE@aol.com@classiccmp.org on 06/28/2001 02:49:20 PM Please respond to classiccmp(a)classiccmp.org Sent by: owner-classiccmp(a)classiccmp.org To: classiccmp(a)classiccmp.org cc: Subject: Re: Whats a reasonable collection? In a message dated 6/28/01 1:46:05 PM Central Daylight Time, mikeford(a)socal.rr.com writes: << >Only thing I don't like is a lack of fast SCSI cards. I have all kinds >of good scsi cards for my EISA computer, but not my Microchannel. I SCSI MCA cards are so common in the systems I find I don't bother to keep them anymore. Want to explain the above so I understand what to look for? >> there's plenty to choose from, scsi with or without cache, or you can even get some of the better scsi controllers out of the 9595 models. I have several non IBM MCA SCSI adaptors which Ive installed in some pre-existing SCSI-equipped PS2s just so I have a standard external connector to work with. Those IBM external cables are getting hard to find.

23 years

Micro Cornucopia magazines

by paul＠orchard.wccnet.org

I have a complete set of Micro Cornucopia magazines. Does anyone here want them? Paul R. Santa-Maria Monroe, Michigan USA

23 years

Whats a reasonable collection?

by SUPRDAVE＠aol.com

In a message dated Wed, 27 Jun 2001 9:19:25 PM Eastern Daylight Time, "Iggy Drougge" <optimus(a)canit.se> writes: << Vance Dereksen skrev: >Responses inline: >On Wed, 27 Jun 2001, Mike Ford wrote: >> >BTW, I'm also very fond of MCA. Just glad I haven't got on my own desktop. >> >=) >> >> A model 9595 was the first computer I was really impressed with >> mechanically when I opened it up. Its built like a Porsche, and actually >> LOOKS good internally. >The 8595/9595 is an excellent machine. Another one that I like very much >is the MCA/PCI IBM PC Server 320 (8640). I spent this day evaluating all my disk brackets to see if one of them would fit the 95. No such luck. I guess I'll have to work something out with a saw and some plywood. Then I spent the evening manufacturing drive power cables, since the 95 power supply has got sockets just like those on drives, as opposed to plugs prodding out of it as on every other PC PSU I've ever seen. Then I carried a big, heavy SCSI drive back home so as to get it up and running with a reference partition. >> I have a couple dozen of various models, with about a dozen 9595 servers. >> One of my big scores in the auction last month was a box of 3Com MCA 10bt >> cards I had been trying to buy for a year or two. >I am trying to find some of those 100Base-T Olicom MCA cards. >As spartan as my 95 was when I got it, at least it had >one such card and an MO drive >Now, if only it had support under some decent OS... whaddya mean? It's got great support for a superior OS! OS/2 of course. Ive gotten warp server, warp connect and OS/2 version 4 running on some 95's I have. Easy and painless, although time consuming install. I believe the 9595 series are on the NT4 compatibility list...

23 years

65xx Chips still available

by rcini＠optonline.net

Hello, all: I know that some sources for these chips are drying up and the 02 and 22 are only available in quantity from CMS. Well, I've been contact with Rockwell and it seems that their Conexant spinoff (the old Rockwell Semiconductor) still manufactures 65xx-series chips. I haven't contacted their distributor yet to find out quantities, etc. but I'll report back when I have more information. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

23 years

Anybody interested in these : CBM 8023P (IEEE) printer and AES7100 (Lanier dedicated WP)

by claudew＠videotron.ca

Hi all from Montreal... I recently got a very nice fully equipped (docs, software, disks, manuals, cables etc...) SuperPet. Private original owner. A-1 condition. It came with a 8023P (IEEE) printer, I dont have a lot of space for this printer...So anyone wants this (just the printer!), I am ready to let it go for anything slightly interesting in return...There is also the manual and a spare ribbon (brand new) for the printer Also, I have decided to let go my minty AES7100 dedicated WP. Its in extra clean shape and boots with the 2 hard sectored floppy disks that were in it when I got it. This thing is one piece odd looking machine :monitor, drives and cpu...it would have to be taken apart and shipped in several boxes. There is the very slight chance that I might be going to VCF east....very slight...If you dont know what a AES7100 looks like look here: http://www.total.net/~hrothgar/museum/AES7100/ ....not mine but identical...mine works and the machine boots... I am mostly collecting non x86 home/hobby machines, also looking for semi recent SGI or Sun stuff to play with.... I am posting here because I dont use ebay to buy or sell and these will likely go to garbage soon if no takers. Thanks Claude http://www.members.tripod.com/computer_collector

23 years

MCArchitect (was: Whats reasonable...

by dhquebbeman＠theestopinalgroup.com

> I put some effort into the Peddle/MCA issue and found nothing yet. > Personally I'd be mildly surprised if an individualist like CP would've > been found at IBM at the time. I checked BYTEs 6/87,7/87 and found > no mention of any architects. In general, IBM did not celebrate the > individual above the team. Few counterexamples: John Cocke, > Benoit Mandlebrot, ? I suppose a specialist could've found out more > at a specialist event line a "Buscon" or the like. Ok, The Chief Architect of IBM's Micro-Channel Architecture was <drum-roll, please....> Chet Heath. My bad. -dq

23 years

A little HP9877 info

by fmc＠reanimators.org

ard(a)p850ug1.demon.co.uk (Tony Duell) wrote: > If the 9815 encoding is idential physically the 9825 one (that is to say, > a 9815 tape read at the 9825 speed contains the data encoded as above > with the same frequencies as the 9825 uses) then the 9877 can read it. If > not, then IMHO it can't. And since the 9815 and 9825 tape controllers are > very diferent, I think it's unlikely that the 9877 (which uses a > controller that's essentially the same as the 9825 one) can handle 9815 > tapes. Pity. Here's a snippet from _Mid-Range Calculator Delivers More Power at Lower Cost_, by Douglas M. Clifford, F. Timothy Hickenlooper, and A. Craig Mortensen, in the June 1976 HP Journal: "...It was determined that a level of performance below that of the 9825A Calculator (see article, page 2) would be adequate, so the search speed was reduced to 60 ips and the read/write speed to 10 ips. The recording density was set at 500 bits per inch. Because of these reduced demands all of the encoding and decoding of the bits can be done in firmware. Also, a frequency-lock control loop is used for the motor control instead of a more costly dc servo (more about this later)." Does that give you any clues? Unfortunately I don't think it says anything about the recording density of the 9825 tapes. -Frank McConnell

23 years

Unibus / Qbus bus drivers and receivers

by ajp166＠bellatlantic.net

From: Chuck McManis <cmcmanis(a)mcmanis.com> >At 09:30 PM 6/28/01 -0700, you wrote: >>Well, the question is "how worried about ringing *should* I be in a >>single backplane configuration if I use bus drivers which have a >>rise/fall time of 9 ns, when the bus spec says that the rise/fall >>time of bus drivers must not be *less* than 10 ns?" >> >>I'm guessing that it will probably be OK, but I really want this >>thing to "work first time" and be reliable so I feel a little >>uncomfortable cutting corners like this right at the outset. > >I take it you are worried about violating the AC spec that reads in part: Generally speaking Qbus is very robust and the design rules are not easily broken nor the bus. Standard devices like LS244 and LS245s work quite fine from expereince. Stick with 74LS or 74L if you have them or can find them. CMOS in the 74HC, HCT and friends however are a bad choice for interfacing the bus, though they may be acceptable in down stream logic. Remember the bus is terminated to avoid pain. Allison

23 years

e-mail comments (was: Re: Whats a reasonable collection?)

by mjsnodgr＠rockwellcollins.com

Marvin <marvin(a)rain.org>@classiccmp.org on 06/29/2001 02:44:27 PM Please respond to classiccmp(a)classiccmp.org Sent by: owner-classiccmp(a)classiccmp.org To: classiccmp(a)classiccmp.org cc: Subject: Re: Whats a reasonable collection? Personally, I would rather see a persons comments *above* the quoted material. That way, I read instantly if I am interested rather than have to scroll down. And yes, I am lazy although I would sometimes prefer to call it efficient :). Iggy Drougge wrote: > > Chad Fernandez skrev: > > >What? How am I ruining anybodys quoting? > > Yes, since you put your comments about the quoted material. > > It look like this: > > 4 > >>>1 > >>2 > >3 > > -- > En ligne avec Thor 2.6a. > > Computers are not intelligent. They only think they are. Interesting... the > >>>1 > >>2 > >3 format of e-mail reply is by far considered the "old style" (kind of fitting for a classic computing list) It was the M$ backward'isation (new technical term) of putting replies at the top of an e-mail implimented in Outlook that forced most folks to change. Netscape Communicator used to default to replies/comments at the bottom, but now defaults to the top. (thankfully you can change that for those of use who have relied on e-mail long before e-mail was cool.) And now I'm stuck using bloody Lotus Notes which also defaults to putting my reply at the top, and refuses to insert a > before each line of the original message. - Hmmm... I'm sounding more and more like a crochety old fart. <grin> It's noce to be able to read linearly through an e-mail. - Micah S.

23 years

qbus prototyping

by engdahl＠cle.ab.com

Douglas Electronics appears to be still in business, and some Qbus proto boards are listed on their web page: http://www.douglas.com/hardware/pcbs/breadboards/digital.html http://209.35.53.132/hardware/pcbs/breadboards/digital.html I emailed Vector a month or two ago, and the person who answered me could find neither boards or knowledge of them: "Sorry, Jonathan, this is not something we make at present. We moved about 4 years ago and trashed a lot of the old dwgs. etc. It doesn't look familiar." -- Jonathan Engdahl Rockwell Automation Principal Research Engineer 24800 Tungsten Road Advanced Technology Euclid, OH 44117 USA Euclid Labs http://users.safeaccess.com/engdahl ----- Original Message ----- From: "Michael Davidson" <michael_davidson(a)pacbell.net> To: <brian> Cc: "Jonathan Engdahl" <engdahl> Sent: Friday, June 29, 2001 2:48 PM Subject: Re: qbus prototyping > OK - actually I believe Jonathan already asked that question > earlier I just hadn't got around to replying to it and I didn't > notice that my reply went just to you and not to the entire list. > > Anyway, as you can see I have more stuff here than I could ever > use and I would be perfectly happy to part with one or two of > them if someone has a good use for them. > > Michael > > Brian Knittel wrote: > > > > Thanks for the detailed info, Michael. I'll forward > > it to Jonathan Engdahl -- maybe these part numbers > > will help him find a source for the things. Apparently > > most supply houses no longer even remember what qbus > > is. > > > > brian > > > > > > Brian Knittel wrote: > > > > > > > > Hi Michael, > > > > What sort of prototyping board are you planning on using? Someone > > > > was asking about the availability of prototype boards just a couple > > > > of weeks ago and no one responded. > > > > > > I have several Qbus prototype boards which I acquired last year as > > > part of an auction on eBay. I'm not sure yet which one I will use > > > for this particular project, but here's what I have ... > > > > > > 2 x DEC W943 > > > 1 x MDB MLSI-WWB1 > > > 2 x Douglas Electronics 9-DE-11 > > > 2 x Douglas Electronics 12-DE-11 > > > 1 x Douglas Electronics 9-DE-8 > > > 2 x Vector 4607 > > > > > > The DEC W943 is a dual height module originally populated with 25 x 16 > > > pin DIL sockets, complete with wire-wrap pins on the component side of > > > the board, power tracks and decoupling capacitors. On each of these > > > boards 2 of the DIL sockets have been removed to make way for a 40 pin > > > connector. > > > > > > The MDB MLSI-WWB1 is a dual height module laid out with power tracks, > > > solder pads and component side wire-wrap pins but no sockets. It could > > > accomodate 30 x 16 pin DIL sockets and up to 6" worth of up to .6" > > > pitch DIL sockets. > > > > > > The Douglas 9-DE-11 is a dual height card populated with 18 x 16 pin > > > DIL sockets and 2 x 40 way connectors. The board has power tracks and > > > decoupling capacitors already fitted. All connections to the sockets > > > and connectors are brought out to wirewrap pins on the component side > > > of the board. There is also an unpopulated area of the board where > > > you could mount up to 5.8" worth of up to .6" pitch DIL sockets. > > > > > > The Douglas 12-DE-11 is a dual height card populated with 18 x 16 pin > > > DIL sockets, and with two unpopulated areas each capable of holding > > > up to 5.8" worth of up to .6" pitch sockets. > > > > > > The Douglas 9-DE-8 is a quad height card laid out with power tracks > > > and solder pads for 60 x 16 pin DIL sockets, and an area where you > > > could mount up to 9.6" worth of up to .6" pitch DIL sockets. At the > > > top of the card there are solder pads for 4 x 40 way connectors. > > > This is a bare card with nothing mounted on it. > > > > > > The Vector 4607 is a dual height card, drilled on .1" pitch with solder > > > pads for connecting to the edge connector and nothing else. > > > > > > > > > A few of these cards had been used for (apparently unfinished) prototyping > > > efforts - they are all in good condition and should be reuseable without > > > any problems - the Douglas quad height card and the MDB dual height card > > > have obviously never been used and are in excellent condition. > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > _| _| _| Brian Knittel / Quarterbyte Systems, Inc. > > _| _| _| Tel: 1-510-559-7930 Fax: 1-510-525-6889 > > _| _| _| Email: brian(a)quarterbyte.com > > _| _| _| http://www.quarterbyte.com >

23 years

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test-drb June 2001