test-drb February 2007

test-drb@ccmp.vtda.org

208 participants
390 discussions

by aek＠bitsavers.org

> Al Kossow wrote: > > > I have see some disk drives on your homepage and want to ask you if > > > sale the magnetic and coils from the old diskdrives? > > > > no > > Hear hear!! > > Peace... Sridhar > -- html links to eBay auctions clipped. "magnetic and coils from the old diskdrives" aren't what you'll find in commodity discs today. I assume he's asking about linear motors >from large drives, circa '85 and earlier, which have mostly gone into landfills. A linear motor from an early 80's drive is on the order of 4" x 8" with a pretty massive casting.

18 years, 1 month

HP 21MX/F and OS choices (was Lookee what I just got!)

by steerex＠mindspring.com

With that work done, it may be practical to boot your HP over a serial port at a reasonable speed, but loading a large ABS file this way can take a very long time (as things are). I generally don't recommend the serial boot method due to its poor performance. Then again, I think its nothing to throw together a PIC and some I2C eeprom and build little paper tape reader and punch emulators, and I can burn copies of any loader rom you wish. I found that serial booting the system to be the easiest way to get started. I don't recall which one but, one of the loader ROMS will work with the "high speed serial" card and read data off a serial link. There's no handshaking or error correction but, with a short RS232 link, passing data is not a problem. The ABS data format does provide checksum error detection so data errors will be detected. On many occasions, I have loaded HPBASIC and other programs over a serial link with absolutely no problem. The advantage to the serial link is that the only hardware required is a RS232 serial cable. Admittedly, it is not as fast as a parallel link but, who cares ;-) I had to write a PERL script to format the data before passing it to the 1000 but, that was fairly trivial. SeeYa, SteveRob

18 years, 1 month

Long-term storage (Was: Re: Google on hard drive failures)

by mtapley＠swri.edu

At 15:35 -0600 2/23/07, der Mouse wrote: >Certainly. And forget centrues; try millennia. The Pyramids. The >Sphinx. Stonehenge. The French cave paintings. Old Greek and Roman >coins from archaeological digs. At 21:11 -0600 2/23/07, Chuck wrote: >Heck, we've "manufactured" artifacts that will last for a hundred >thousand years or more. Just google "Yucca Mountain". Pikers. Try the Voyager record. *That* puppy is going to be around (somewhere) for some serious millenia. Or the CD taped to the New Horizons Spacecraft, seen below in on-topic format :-). Data retrieval, however, will not be easy. -- ______ Mark Tapley ------ Third Planet || SWAP 210-379-4635 Cellphone ---- _|__|______ __..---..__ | | \ _`-' ``-. HGA(REX) PEPPSI | ---- _' `-_ `-. | .' `-_ `. .-| , `-_ `. LORRI : | . `-_ `. : | / SDC `-_ \ '-|. below `-_ . _______ _______ |' .-*-. `-_ ||+|+|+|+| |+|+|+|+| | / \ `|--`-------------------| | ! o-----> +X | | | | \ | / _,|--.-------------------| |. "-|-" _,- ||+|+|+|+| |+|+|+|+| |' | _,- ' ------- ------- | ' V _,- / RTG (Radioisotope | ` +Z _,- . Thermoelectric | ` _,- - Generator) | `. _,- .' | '. _,- _.-' artwork: Lillian |__________',-__ __,,,'' Nguyen | | '' --- '' | | `-----' PERSI (Alice above, Ralph below)

18 years, 1 month

Tek 7904 scope

by tpeters＠mixcom.com

At 01:05 PM 2/17/2007 -0800, you wrote: >On 2/14/07, Tom Peters <tpeters at mixcom.com> wrote: >> >>Hey all, >> >>I just missed out on a Tek 7904 scope (four trace) with four plug-ins for >>$299. Was that a deal? The plugins were 7A26 7A18 7CTIN and 7B53A. >> >>Looks like a 500mhz scope, but with plugins good for 200mhz and a curve >>tracer. >> >>Are plugins for that scope readily avaiable and reasonably priced? >> >>-Tom (my real name) Peters. >hey, since the listing should be over by now (since you said you won >it)...perhaps you wouldn't mind sending us a link to the listing so we can >all drool over exactly what you got? :P :D :) Sure, absolutely. The item number originally posted for $299 has been lost. The relist at my price is below. Try not to drool on the knobs- they get slippery and hard to adjust ~(:-) that's me with a feather in my cap. Item number: 330089349032 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=014&sspagename=STRK%3AMEWN… 'Tis an ill wind that blows no minds. --... ...-- -.. . -. ----. --.- --.- -... tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio) "HEY YOU" (loud shouting) WEB ADDRESS http//www.mixweb.com/tpeters 43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User 385531

18 years, 1 month

OT - cool space photo available

by chrism3667＠yahoo.com

If anyone is interested, I have a photo someone sent me of this: "...a time lapse photo of the ROPA (40.020) launch where you can see the aurora in the background and all four stages." Still haven't set up the ol' website, so I can't simply post it there. If anyone would like me to forward it to them, ping me. Really groovy stuph. The wonderful human being who sent it to me was actually involved in the launch, in some capacity. I might not be forwarding it out until the next time I'm online. Prolly Monday or Tuesday. ____________________________________________________________________________________ It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar. http://tools.search.yahoo.com/toolbar/features/mail/

18 years, 1 month

Analogue/vector character generator - anyone remember the URL?

by listmailgoeshere＠gmail.com

Hi cctalkers, A while back there was a URL posted somewhere on this list about a (1950s?) character generator which worked solely by mixing harmonics, with X-Y output to connect to a display tube. It could only generate the digits 0-9, but was a seriously impressive piece of kit nonetheless. I recently wanted to show this to a friend, and couldn't find it with any amount of Googling. If someone can remember this site, or has it bookmarked, I'd be endlessly grateful for the URL. Thanks, Ed.

18 years, 1 month

Analogue/vector character generator - anyone remember the URL?

by lee＠geekdot.com

http://www.nixiebunny.com/crtgen/crtgen.html Lee.

18 years, 1 month

microvax monitor card needed

by ying6926＠ureach.com

The monitor of my microvax died. It is worse to play with machine without monitor than without mouse on modern computer. The model is matrox 1985 QG-640 254-06-02. I could not read it clearly. It could be QC-640 instead of QG-640. Just wonder if anyone has this for sale or giveway. thanks Henry

18 years, 1 month

s-100 cards, free for the price of shipping

by frustum＠pacbell.net

Spring comes early in Texas; too many days in a row of 80 degree weather triggers my spring cleaning subroutine. I have just poorly photographed and barely cataloged 28 S-100 cards, all but one, made by IMS -- Industrial Micro Systems. None are tested. My main criterion for picking will be whatever is easy for me, but I can't say that unfairness, prior exchanges, and unfounded opinion will also influence which board goes to where. That is, if I'm so lucky that anybody wants these. The boards are well made, although some have had parts removed (most are complete). None have been tested by me. I've had them for, uh, I guess two years, and the previous owner was given them some years before. You can see the index and pictures here: http://home.pacbell.net/frustum/s100/ Each card is in a 6"x10" antistatic bag, inside a padded mailer. They will be further padded with bubble wrap and boxed, and sent via USPS priority mail. You pay the shipping. I'll give people a few days to respond, then I'll get to work boxing and mailing. Please let me know which board(s) you are interested it, and if you have some specific need or use for one, let me know that too as it may influence the judge. Responding to the list instead of frustum at pacbell.net is an automatic 3/10th scoring deduction. If you are wonder why there are no cards 11, 22, or 33, it is because I used my children's number blocks to act as an index record when photographing, and there is only one of each number. :-) Below is the index: Box #1 ======================================================================== 1 - IMS A645 Rev B Z80 CPU; 2K boot ROM labelled "TST"; empty spot for RTC 2 - IMS C00451 Z80 CPU, (c) 79 3 - IMS A930 Rev C Floppy Disk Controller (NEC 765-based); also NEC 8257 (DMA) 50 pin connector (8"), (c) 84 4 - IMS A443 I/O Board, NS 8255 PIO, "IPL REV 1.4" EPROM, 2*GI AY-3-1015 UART, NEC 8253 PIT, one ear missing from connector, two empty sockets; not sure if they should be stuffed or not 5 - IMS A1021 Rev C, (c) 1983, 64K DRAM, with parity and parity error indicator All 9 DRAMs have been removed, but otherwise intact 6 - IMS C00451 Z80 CPU, Rev C., (c) 79 7 - IMS C00442 I/O Board, NS 8255 PIO, "IPL REV 1.4" EPROM, 2*GI AY-3-1015 UART, NEC 8253 PIT 8 - IMS C00480 4-Line Comm. Controller (NS 8250 * 4) 9 - IMS A930 Rev C Floppy Disk Controller (NEC 765-based); also NEC 8257 (DMA) 34 pin connector (5.25"), (c) 84 12 - IMS A930 Rev B Floppy Disk Controller (NEC 765-based); also NEC 8257 (DMA) 34 pin connector (5.25"), (c) 82 13 - IMS C00442 I/O Board, NS 8255 PIO, "IPL REV 1.1" EPROM, 2*GI AY-3-1015 UART, NEC 8253 PIT 14 - IMS A971 Rev A (c) 83, Z80A CPU board, but it has been stripped of some chips, including the Z80 and boot ROM, a few jellybeans, likely a couple serial controllers, and a RTC 15 - IMS A971 Rev B (c) 83, Z80A CPU board, but it has been stripped of some chips, including the Z80 and boot ROM, a few jellybeans, likely a couple serial controllers, and a RTC Box #2 ======================================================================== 21 - IMS A1030 Rev A, (c) 83, Isolated I/O board; 16 inputs, 16 outputs 23 - IMS A1270 Rev B, (c) 84, Z80B Master/Slave Board; missing Z80, two banks of DRAM, RTC, serial chip, but jellybeans are there 24 - IMS C00464, (c) 79, 64KB DRAM, parity checked, 4x9x16Kb all DRAMs missing 25 - IMS C00401, (c) 79, floppy controller, NEC 765, NEC 8257 (DMA) 50-pin connector (8") plus a 16-pin connector (??) 26 - IMS C00480, (c) 79, 4-Line Comm. Controller, 4*8250 27 - IMS A821 Rev A WD Controller; 8255 PIO, EPROM labeled '5" WINCH' This very likely requires an adapter card, which I have many of 28 - IMS A821 Rev A WD Controller; 8255 PIO, EPROM labeled '5" WINCH' This very likely requires an adapter card, which I have many of 29 - IMS A821 Rev A WD Controller; 8255 PIO, EPROM labeled '5" WINCH' This very likely requires an adapter card, which I have many of 31 - IMS A1021 Rev C, (c) 1983, 64K DRAM, with parity and parity error indicator All 9 DRAMs have been removed, but otherwise intact 32 - IMS C00451 Z80 CPU Board Rev B, (c) 79 34 - IMS A1100 Rev D, (c) 84, Winchester Controller ST412/506 type interface NEC 8085 CPU, EPROM, 2KB SRAM, three Adaptec disk interface chips 35 - IMS A1100 Rev C, (c) 84, Winchester Controller ST412/506 type interface NEC 8085 CPU, EPROM, 2KB SRAM, three Adaptec disk interface chips 36 - IMS A1100 Rev C, (c) 84, Winchester Controller ST412/506 type interface NEC 8085 CPU, EPROM, 2KB SRAM, three Adaptec disk interface chips 37 - IMS A1010 A/D Converter, Rev A, (c) 83, 8 Channels; NS ADC0809 38 - unknown mfr modem Finally, sorry for the poor quality photos. I'm not a photographer and I didn't check them until after I had already taken all the pictures and slipped each card into an anti-static bag.

18 years, 1 month

Pinout of RJ12 to minidin (PS/2) keyboard adapter for IBM 315x terminals

by pat＠computer-refuge.org

I know that a couple people who watch this list were wanting this info... I took the one RJ12 to minidin-6 adapter which I got with an IBM 3153 terminal, and pinned it out. The pinout of the connectors is from what I could tell, the "standard" pinout for each connector. RJ12 (tab down) MiniDIN-6 (socket) 1 .. 6 /--__--\ +------+\ / 6 || 5 \ |||||||| | | 4 3 | | | | \ 2 1 / +------+ | \------/ \______\| Ok, now the cable pinout: DIN RJ12 Use 1 2 Data 2 4 N/C 3 4 GND 4 6 +5VDC 5 1 Clock 6 N/C N/C Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

18 years, 1 month

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test-drb February 2007