test-drb March 2010

test-drb@ccmp.vtda.org

182 participants
231 discussions

eBay Oz : Collection of DEC Unibus modules including custom wire-wrap

by nigel.d.williams＠gmail.com

All sorts of interesting items: TU-60, CM-11, M792 etc http://shop.ebay.com.au/pdp11.caps11/m.html?_nkw=&_armrs=1 not connected with seller, however I did purchase fanfold paper-tape from this eBayer.

14 years, 4 months

More HP microcode & loader rom detective work

by jdbryan＠acm.org

Jay, On Tue Jul 27 2004 at 09:34, Jay West wrote: > I'm finally digging into my 21MX E-series machines in earnest. In > trying to inventory and document what all I may have, I've found a few > things that stump me and my "docs on hand". Perhaps folks here can shed > some light on these. > > [...] > > Microcode roms I can't identify: > > 93585-80006 > 93585-80007 > 93585-80008 OK, I'm a little late in responding (about six years late :-), but these are the E-Series double-integer firmware instructions (.DAD, .DSB, etc.). They are a product from the HP "specials" group, so they weren't on the regular price list. The relevant HP manual is 93585-90007 at Bitsavers. > 18A0580X012 > 18A0580X022 > 18A0580X032 These are another HP "specials" group product: "93578W Special Pascal Library Subroutines" for the E/F-Series. These are microcoded replacements for the bit-field extract, deposit and indexing run-time function calls emitted by the HP Pascal compiler for access to packed arrays and records. I gather these were used to reduce execution time in Pascal programs. I've not found a manual for these. -- Dave

14 years, 4 months

Computer on eBay probably analogue

by roger.holmes＠microspot.co.uk

There's a strange computer in Kansas USA on eBay, wrong side of the pond for me anyway. It appears to be for calculating milling machine feed rates. The seller seems to think its a CNC control box but I'm fairly sure it isn't. I found it interesting anyway, the item number is 320502473280. No connection to the seller.

14 years, 4 months

RGB-VGA Converter -- buy or build?

by silvercreekvalley＠yahoo.com

Ive used lots of RGB/VGA converters over the years for various bits of equipment, mainly older 8 bit micros. There never seems to be a one solution to fit every case, and I've found that different converters work best with different systems. Sometimes I've found using two converters works best, eg going from RGB + composite sync to composite video, and then from composite video to VGA. Just my 2c

14 years, 4 months

books offered

by rtellason＠verizon.net

Got a few here that might be of interest to folks on the list: -- Fundamentals of COBOL Programming (1968, 1973) -- Programs for Electronic Circuit Design (1986), Radio Shack -- How to Build A Working Digital Computer (1969) Hayden -- Writing BASIC Adventure Programs for the TRS-80 (1982) Tab These (along with a couple hundred others) I have listed on Amazon, but feel free to contact me off-list and let me know if you'd like any of them. I'd like to cover shipping costs, and "a little extra" and get them into the hands of somebody that wants them. Oh, and I still have that IBM binder mentioned in an earlier post -- got three replies, wrote three responses to 'em, and so far nobody has gotten back to me yet to answer "What do you care to offer for it", I'm not just gonna eat the postage, etc. :-) -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

14 years, 4 months

Selling my SBC6120 (PDP8)

by julian＠twinax.org

Just thought I'd let people interested know I'm selling my SBC6120 board, it's a first run, but still quyite useful, when you look at the new ones that run $600 for a kit. It includes the CPU. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300406995665

14 years, 4 months

Selling my Commodore 128D, if anyone's interested.

by julian＠twinax.org

So, I've decided to part with my 128D, as I already have a flat 128 which I prefer: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300406951107> &item=300406951107 Julian

14 years, 4 months

APTEC board

by wdonzelli＠gmail.com

I have a little board (2 by 3 inches) with a few TTL chips (7408 and 7474s) with a short ribbon cable terminated with a 14 pin DIP header. No numbers, but the board says APTEC, 1976 REV B, and a "phase 2" symbol. I think this was part of some old microcomputer stuff I used to have. Any ideas what it could be? -- Will

14 years, 4 months

Soldering (Was: Re: HP-IB, Amigo/cs80 ... )

by trag＠io.com

> > Date: Thu, 18 Feb 2010 13:07:58 -0700 > From: Ben <bfranchuk at jetnet.ab.ca> > Chuck Guzis wrote: > >> Soldering now is far safer than it used to be. I can still recall >> the glorious sensation of picking up an American Beauty 100W >> soldering iron by the wrong end. >> >> I suppose that we should be thankful that we don't use an >> oxyacetylene torch for PCB work... > > I guess that is why BYTE[1] went from a hardware magazine > to software. Some of the best advice I got in college was from an EE professor who told us, "If you drop your soldering iron, don't try to catch it on the way down. Just let it go." Jeff Walther

14 years, 4 months

test

by chd＠chdickman.com

This is a test. This is only a test. If this had been an actual emergency, you would have been instructed....

14 years, 4 months

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test-drb March 2010