test-drb August 1999

test-drb@ccmp.vtda.org

161 participants
565 discussions

by rigdonj＠intellistar.net

I pulled this card out of a PC, it looks like some kind of LAN card but I've never seen one like it. Can anyone tell me more about it? It's a full length card that plugs into a 16 bit ISA slot. It has two large ICs on it. One is markled "APOLLO004329" "TC17GO42AT". The other says "L1A3015 015935-0001" "BICAT 1". One th eback is a connector about the same size as a DB-15 but it has a large contacts at each end and 5 regular size contacts in the center. The large contacts looks like the same ones that are used in the 13W3 cable for a Sun monitor. Joe

25 years, 4 months

imsai 2

by edick＠idcomm.com

The question in my mind is whether there are enough sources of the required parts that the people willing to pay IMSAI's rather generous price will be able to see a clear path to somewhere. Where that might be is another question. I always appreciated the "look" of the IMSAI with its big paddle-switches as opposed to the little ones on the ALTAIR. However, if I were going to use a front panel again, I'd use neither type of switch, myself. I built a very flexible front panel at one time using pushbutton switches with an integral LED, which, conveniently enough, comfortably sat on a 14-pin wire-wrap socket. When you wanted to set a switch, you pressed the switch if it wasn't already set. When you wanted it cleared, in the event it was set, you'd press it to clear it. it was difficult to get confused about which LED was associated with which switch. Another switch promotes the data into a presettable counter bank for each byte of the addresses or data. It's easy to step sequentially through a block of address space or data values. If a guy wants a box like the one that was on "War Games" I guess he'll want this one, though. Dick -----Original Message----- From: allisonp(a)world.std.com <allisonp(a)world.std.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, August 17, 1999 12:08 PM Subject: Re: imsai 2 >> I'm curious what will happen with the IMSAI in view of the lack of >> current-generation 8080's. Maybe they'll substitute an FPGA. Otherwise, of >> what use will it be? > >Assuming you mean that 8080s are not available...Lots of places still >sell them. I doubt they will need more than a handfull to satisfy any >likely orders. > >Allison > >

25 years, 4 months

imsai 2

by edick＠idcomm.com

I'm not sure that "jumpering across" the 7805 will be healthy for the 7805. Of course, if the input doesn't drop below the output during shutdown this may not be a concern. However, if there's a significant off-board load on the input switching supply, and significant capacitance (bypass, for example) on the board, it's likely to cause problems. Dick -----Original Message----- From: CLASSICCMP(a)trailing-edge.com <CLASSICCMP(a)trailing-edge.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, August 17, 1999 4:20 PM Subject: Re: imsai 2 >>What puzzles me is why the IMSAI folks decided to use a switching power >>supply when the box and everything else already supported the needs of the >>S-100 with the previously available and now quite inexpensive unregulated >>supplies of yesteryear. > >Probably an issue of economy, using PC-clone power supplies at about >$25 each vs using a custom-wound transformer at $200 or so a pop. > >> One of the main benefits of the S-100 was that it >>had on-board regulation, so that if you didn't need a given supply, you >>didn't have to bring it on board and regulate it, dissipating power as you >>went. If the new box is capable of running the original boards, it must >>provide the raw 8 and +/- 16-volt supplies. Where's the benefit in having a >>switching regulator sitting in the back of the box? I suppose it creates a >>market for a power distribution module to put +5 and +/- 12 on each board >>which needs it rather than using the on-board regulators, but that opens >>another can of worms. What's the "right" way to distribute it without >>tampering with a historically correct board? > >According to what I read from the web page, there's a PC-clone switching >power supply followed by a "boost" switching circuit to get back to >+8 and +/- 16. That's not completely unreasonable, but it sounds a >little bit fishy to me in the sketchiness of the details. > >Several S-100 manufacturers who were still at it in the mid-80's had >regulated +5V on the S-100 backplane. Those who wanted to use their >older S-100 cards in such a machine just jumpered across the 7805's and >viola! > >-- > Tim Shoppa Email: shoppa(a)trailing-edge.com > Trailing Edge Technology WWW: http://www.trailing-edge.com/ > 7328 Bradley Blvd Voice: 301-767-5917 > Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 4 months

Comprehensive Commodore History

by ckaiser＠oa.ptloma.edu

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25 years, 4 months

IBM 5100 (serial no. search)

by wsmith＠gj.com

Robert Uiterwyk <uiterwyk(a)eisers.com> 08/16 11:53 AM wrote: >I am desperately looking to fill the last hole in my "machines that I have >worked with" museum. > >An IBM 5100 - This machine used two 1/4 inch tape drives and had either >Basic or APL (or both) in ROM. Inbtroduced in 1975 by IBM. I am seeking assistance in estimating the total production of IBM 5100s. I believe this can be done by collecting a sufficiently large sample of serial numbers and related information. Hopefully, I will be able to divine the numbering convention and thereby come up with a reasonable estimate of total production. This, of course, assumes that the units were serially numbered. Therefore, I am looking following information for 5100 units: 1. Model (BASIC only, APL only or APL/BASIC) 2. Manufacture date (if known) 3. Serial number Also, I would like to receive item 2 and 3 information of 5106 tape drive units. Thanks, all. ! ! !

25 years, 4 months

Stan Veit's web site

by dastar＠ncal.verio.com

I don't know if you all know about this already but its a pretty nice site. http://www.pc-history.org/ It's Stan Veit's, who by the way will be speaking at VCF 3.0. Sellam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------ Don't rub the lamp if you don't want the genie to come out. Coming this October 2-3: Vintage Computer Festival 3.0! See http://www.vintage.org/vcf for details! [Last web site update: 05/25/99]

25 years, 4 months

imsai 2

by edick＠idcomm.com

In 1964, Olin-Mathieson acquired Winchester. For years after that, the gun ads in the papers would advertise their "pre-1964" shotguns, rifles, etc. at prices well above those of the "new" ones. The Olin-Mathieson folks did take tooling out of mothballs and produce models which had been discontinued, but folks seemed to prefer the "old" and original ones. I'm curious what will happen with the IMSAI in view of the lack of current-generation 8080's. Maybe they'll substitute an FPGA. Otherwise, of what use will it be? Dick -----Original Message----- From: William Donzelli <aw288(a)osfn.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Tuesday, August 17, 1999 9:59 AM Subject: Re: imsai 2 >> I couldn't help but wonder: Will the fact that you can buy a new one for >> $995.00 finally curb the pricing on places like ebay for the vintage ones do >> you think? > >No, not at all. People will pay for the history. > >Look at the old Western Electric 300B audio tube (valve). These things >skyrocketted to several hundred dollars each. A few years ago, Westrex >decided to tool up and make them again. They produced 300Bs that are >_identical_ to the old ones. What did the price of the old ones do? Well, >not much. A little bump, thats it. > >William Donzelli >aw288(a)osfn.org

25 years, 4 months

late nights and caffeine

by zmerch＠30below.com

Rumor has it that Max Eskin may have mentioned these words: >On Mon, 16 Aug 1999, Merle K. Peirce wrote: >>I fear if I stopped drinking tea, I would vitiate the economies of Ceylon >>and India. > >Oh, you drink _real_ tea, no Lipton? I'm slowly trying to stop myself from >using that trash, but it's so darn _convenient_! Well, if you call drowning a haybale in boiling water 'convenient' -- ;-) Personally, give me a nice cup of good, strong, Earl Grey... with just a touch of _dark brown_ sugar... it gets rid of the acid-y taste without adding nearly so much of a sweet flavor. Just don't let the water get *cold* with the tea-bag still in - it will get a lot more bitter. Haven't tested 'em all, but Bigelow is my preferred brand. And now back to our regularly scheduled listserv. :-) "Merch" -- Roger "Merch" Merchberger --- sysadmin, Iceberg Computers Recycling is good, right??? Ok, so I'll recycle an old .sig. If at first you don't succeed, nuclear warhead disarmament should *not* be your first career choice.

25 years, 4 months

check it out

by foxvideo＠wincom.net

>To: avfreelancers(a)topica.com >From: Keith Kay <cowboyarts(a)aol.com> >Subject: check it out >Date: Fri, 13 Aug 1999 16:41:19 -0700 >Reply-To: avfreelancers(a)topica.com >X-Loop: 10002755 > >You old pros probably have been here but word of this site just reached >Grapeland via Hong Kong. >Cheers, Keith Kay > > >This one came to me via a friend, and I thought it was a joke, but it's >really amazing. The note below tells it all. Try it! > >Barry > > From: David Thurston <thurston(a)loxinfo.co.th> > To: Saul Lockhart <100426.1233(a)compuserve.com> > Subject: new camera > Date: Friday, July 30, 1999 8:28 AM > >I just found an unbelievable new web site that you must check > out. Misrocoft is testing a new technology that allows you to take a >picture >through your present computer. I know, it shouldn't be possible,but they > have done it.I went to the web site and did it my self and was absolutely >amazed at the accuracy of the photo. > > http://www.geocities.com/Heartland/Acres/3072/camera1.html >>> >>> > >-- >This footer has been added by the list owner: > >You can unsubscribe from this list at any time by sending a blank message to >avfreelancers-unsubscribe(a)topica.com >You must be using the email address with which you subscribed. > >________________________________________________________________________ >Start an Email List For Free at Topica. http://www.topica.com/register > > > Charles E. Fox Chas E. Fox Video Productions 793 Argyle Rd. Windsor N8Y 3J8 Ont. Canada email foxvideo(a)wincom.net Homepage http://www.wincom.net/foxvideo

25 years, 4 months

Article on old software programs (for IBM, Apple, Borland, etc)

by gregorym＠cadvision.com

-----Original Message----- From: JAMES WEBSTER <jwebste3(a)bellsouth.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Monday, August 16, 1999 6:30 PM Subject: Re: Article on old software programs (for IBM, Apple, Borland, etc) >Sellam Ismail wrote: >> >> On Mon, 16 Aug 1999, JAMES WEBSTER wrote: >> >> > To put it kindly, Victoria Shannon sounds like she is full of it. >> > >> > > http://www.washingtonpost.com/wp-srv/WPlate/1999-08/16/026l-081699-idx.html >> >> Full of what, and in what way? >> > >Read about the last 2 paragraphs. >Jim Webster > I read the whole article, and I don't see anything too objectionable there. No major factual errors, a balanced point of view ... what exactly do you object to? Mark.

25 years, 4 months

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test-drb August 1999