test-drb April 2005

test-drb@ccmp.vtda.org

269 participants
730 discussions

by anheier＠owt.com

A business trip has me going to Albuquerque next week and I have Monday afternoon free. Can anyone suggest some must see computer surplus shops? Thanks Norm

21 years, 1 month

HEC4 Electronic Computer

by marvin＠rain.org

While again searching for radio stuff :), I ran across this website in Australia with an interesting article written in 1954 about the Morgan Crucible Co. Ltd, and how they justified their purchase of the HEC4 Electronic Computer. From the first few paragraphs: "The computer selected was the HEC4 Electronic Computer designed by the British Tabulating Machine Co (later becoming ICT and then ICL - who re-named it the ICT 1201), which was used with modified Hollerith punched card equipment for I/O peripherals. Systems were designed to use conventional 80 column punched card equipment for much processing (sorters, collators, tabulators and reproducers). Details of this machine are described in a second article below. Both articles were published in the "Electronic Engineers Reference Book" for 1958. The cost of the machine was about ?30,000." Also included are the specifications of this machine: Specifications of ICT HEC4 HEC4 Brief Specifications P.R.F. 38.4 kc/s Number base Binary Mode Serial Word Time 1.25 milliseconds Word length 39 and sign Instruction type 1 operand; 1 next instruction Magnetic Drum 3,000 rpm; 64 tracks; 1024 words; track switching 5 milliseconds; 18.75 milliseconds max. access Quick Access stores 2 words Add or Subtract 2.5 milliseconds Multiply 800 milliseconds max.; 240 milliseconds ave (slow) 50 milliseconds max.; 22.5 milliseconds ave (fast) Divide 48.75 milliseconds Punched cards 100 cards per minute (in); 100 cards per minute (out) Printer 100 lines per minute; 100 characters per line Price ?30,000 http://www.vk2bv.org/sb/hec4.htm

21 years, 1 month

MOS Kim-1 Any idea of it's worth/value?

by us21090＠yahoo.com

/* coming out of the shadows.... */ I'm planning on exhibiting my MOS Kim-1 at the Trenton Computer Festival (http://www.tcf-nj.org) and it occurred to me that I don't know what this computer is worth (whatever that means). My Kim-1 works and is a Rev B MOS unit, with original blue-cover manuals (as well as home brew case and a home brew 2k memory expansion). The only data point I have is a recent ebay auction, where 2 working Kim-1s, nice enclosures, Kim Extender Interface, 4 memory cards, S100 breadboarding card, issues of "Micro", etc went for $642. The item description doesn't mention Rev #, or even whether its a MOS or Commodore (though the photo shows *white* manuals). So... roughly $300 for a Kim-1? Thanks! Scott __________________________________ Yahoo! Messenger Show us what our next emoticon should look like. Join the fun. http://www.advision.webevents.yahoo.com/emoticontest

21 years, 1 month

[OT]Tasted freecycling group. Wanted:offered ratio too high

by cb＠mythtech.net

>I registed to a local freecycling group. I receive several tens of >emails each day. 80 percent are wanting and 20 percent are offering. I >would expect the reversed ratio. Why would you expect the reverse? Do you have 80% more items to give away then what you would like to take? -chris <http://www.mythtech.net>

21 years, 1 month

DEC Power Supply - QBA11-VA

by technobug＠comcast.net

I just rescued a power supply and power entry module from what remained of a QBA11-VA. From what remained of the housing it looked like a disk/tape/CDROM enclosure. Available for the cost of shipping. CRC

21 years, 1 month

rx01 w/o controller board

by GOOI＠oce.nl

Hi Brad, the connection from the controller board (UNIBUS or QBUS) is a straight cable AFAIK. The RX01 and RX02 exist as a table top box and uses a DB25 connector to the controller. If you want to make a complete RX01 drive, the first thing to check is the *bottom*. Since many parts have been removed for perhaps completing other drives, check if the drive belt is still there on each drive! The RX01/RX02 drives have *two* boards mounted on top of the disk drives and they cover bothe drives, so they are not smallish. Tony gave (as usual) a good description. I was surprised to read that the two boards are somehow matched. That is a pity because I have two *sets*, and since one board has a rather high connector (relative to the other components on that board, and the other board is a bit smaller, I have put those two boards together. So there is a chance that they are kept as a set togethre but I am not 100% sure. I have also a complete power supply, but it is wired for Europe, that is, it is set for 230/240 VAC 50 Hz. I don't know if there are taps on the transformer to make it work at 110 V. Neither if it can cope with 60 Hz. And I have also the fan and air plenum that is mounted on the back of the drives ... > Sounds like you have rather a lot to find. > > -tony Well, it looks that I have all what you need. I stripped an RX01 just a few weeks ago, and the only parts that I threw away is the metal front (heavily scratched) and the metal frame on which all is mounted). Small problem though, the power supply is heavy ... and I live in The Netherlands ! BTW, I do not have spare belts :~) - Henk, PA8PDP.

21 years, 1 month

The SC/MP is finally alive!

by river＠zip.com.au

Hi, Found the problem with the SC/MP. I don't have the SC/MP programming manual but have figured out there was a difference of opinion between me and TASM on a few instructions. I now understand all the SC/MP instructions and TASM's expectations. Anyway, it's advanced from the prototype breadboard stage and it's now a permanent system - all soldered and complete. For those that are interested, it's a SC/MP II (ISPA/600D) running at 2.048Mhz. It's got 2 x 4K (2732) EPROM, 2 x 2K (6116) RAM, 1 x 8251 USART and 1 x 8255 PPI. I've got the comms and PPI working a treat and now I've got to embark on the fun task of creating a debug/monitor for it. Does anyone else here build old stuff like this? Or do you build your own debug and monitor software? Any experimenters/builders here? river

21 years, 1 month

Test -- please ignore

by news＠computercollector.com

This is a test, please ignore. ----------------------------------------- Evan Koblentz's personal homepage: www.snarc.net *** Tell your friends about the (free!) Computer Collector Newsletter - 700 readers and no spam / Publishes every Monday / Write for us! - Mainframes to videogames, hardware and software, we cover it all - W: http://news.computercollector.com E: news at computercollector.com

21 years, 1 month

input sought for list

by KParker＠workcover.com

Hi Jay - be happy to help you give the site a spruce up Here are some samples of my work www.workcover.com www.maqohsc.sa.gov.au www.region2ops.on.net (this concept would make a good ClassicCMP web site :-) www.advancedimaging.com.au www.barossashops.com www.gawlershops.com www.salvationarmy.org.au/gawler ++++++++++ Kevin Parker Web Services Consultant WorkCover Corporation p: 08 8233 2548 m: 0418 806 166 e: kparker at workcover.com w: www.workcover.com ++++++++++ -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Jay West Sent: Wednesday, 6 April 2005 3:12 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: input sought for list I'm looking for input from the list as to things that should be in the classiccmp list FAQ. I've got lots of ideas, but want to hit ideas I may not have thought of (I'm old, I forget ;)) If you have any text you think should be included in the FAQ, or ideas you'd like me to come up with text for, please email me offlist for review. In addition, I think it's high time to spruce up the classiccmp website. I'm not a web developer, so if anyone is good with HTML and would like to help maintain the classiccmp website, email me, your services would be appreciated! Along the same lines, I'm also looking for suggestions to improve the classiccmp website as to content and features. Any thoughts are appreciated! Regards, Jay West ************************************************************************ This e-mail is intended for the use of the addressee only. It may contain information that is protected by legislated confidentiality and/or is legally privileged. If you are not the intended recipient you are prohibited from disseminating, distributing or copying this e-mail. Any opinion expressed in this e-mail may not necessarily be that of the WorkCover Corporation of South Australia. Although precautions have been taken, the sender cannot warrant that this e-mail or any files transmitted with it are free of viruses or any other defect. If you have received this e-mail in error, please notify the sender immediately by return e-mail and destroy the original e-mail and any copies. ************************************************************************

21 years, 1 month

LaserWriter Plus

by liste＠artware.qc.ca

Looking around the local salvation army, I spotted a LaserWriter plus. I've searched the archives and discovered it's a PostScript enabled laser printer with RS-442 interface. It seems. No disucssion of the "plus" specifically. If it helps, there was a DB-25, a DE-9 and small (4? 6?) dip switch on the back (that I remember, I don't remember any mini-DIN). I'd be interested in having a "real" postscript printer. But I'd like to test it before buying. - Is there a way to print a test page w/o pluging into a computer? - Can this be interface to a straight PC? If the DB-25 is RS-232, I'd assume so. - Is toner readily available? Also, there was an ImageWriter II if anyone wants one. Thank you, -Philip

21 years, 1 month

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test-drb April 2005