test-drb March 2004

test-drb@ccmp.vtda.org

273 participants
673 discussions

by wmaddox＠pacbell.net

Does anyone know of a source for replacement lamps for a PDP-8/E console? I have an otherwise immaculate console board that I would like to use in its original condition, e.g., w/o an LED conversion, but one of the bulbs has been broken, and, at any rate, additional failures are likely. Thanks, Bill

20 years, 8 months

Old Tandy Computer Equipment

by les＠lesgoulden.plus.com

To Whom it May Concern, I have some old Tandy computer equipment and many secondhand 8" Disks. I have been told that you might be interested? Who are you and what do you do? My name is Les and I live in Plymouth. Les

20 years, 8 months

PDP-8/A board info

by mbg＠TheWorld.com

>I'm trying to figure out what this board is/does. It's a DEC hex height >board marked M8597A. On the back it's also marked PDP 8A Control. DX10, PDP8 interface Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com | | Member of Technical Staff | megan at savaje.com | | SavaJe Technologies, Inc. | (s/ at /@/) | | 100 Apollo Drive | URL: http://world.std.com/~mbg/ | | Chelmsford, MA 01824 | "pdp-11 programmer - some assembler | | (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+

20 years, 8 months

The story finally make the paper.

by mross666＠hotmail.com

Message: 2 Date: Fri, 5 Mar 2004 08:00:09 -0500 From: "Brian Mahoney" <brianmahoney(a)look.ca> >Almost a year ago, April 24, 2003, the Toronto Star did an article on >collecting featuring myself and Kevin Stumpf. Even though the guy took lots >of shots in my basement, regretfully only Kevin made the big time, standing >in front of his ex-Ontario Power Generating IBM 1800. (Maybe it was >because >he had a tie on and I didn't.) >We got the whole back page of the Technology Today section, well ... except >for a gigantic Canon ad. Kevin's site was mentioned as was my own >collector's list at Geocities (which everyone here should be on!) >If there is any interest, I could scan this aticle and put it up on my site >for a bit. >BM Ping! By a staggering coincidence, the 1800 mentioned (which is mine - Kevin had been storing it for me) finally showed up at the Corestore today, in a very large truck! I'll be updating the web page below with more photos tomorrow night. A couple of the pics from the article mentioned (I presume the same article) are at: http://www.corestore.org/1800.htm If I can get my arse into gear and this thing running, I'll drag it to VCF East... IPL diagnostics from punched cards, wheeeeeee! :-) Mike http://www.corestore.org _________________________________________________________________ Learn how to help protect your privacy and prevent fraud online at Tech Hacks & Scams. http://special.msn.com/msnbc/techsafety.armx

20 years, 8 months

AUI cables in UK?

by cb＠mythtech.net

>> IIRC, its also used on the Apple DOS cards. I'd have to go check a cable >> to be sure, but I'm pretty sure its 26 pins, in a DA shell (same size >> shell as AUI uses) > >That's not correct. The size of the shell is between a DA and DB, and it >has 19 pins. Are you sure? Are you thinking of the same cable that I am? I just did a quick check, and I found via Google a page that gives the pinout for the Mac's PC Compatibility Card's cable. It shows it as a 26 pin connector. I'm no longer at work where my cables are, so I can't physically inspect them. I thought the connector on the DOS Compatibility card was the same "physical" connector that is on the PC Compatibility card (although the cables, and I believe the pinouts are different). Again, I can't physically check mine, so I can't be 100% sure. Maybe the DOS card version was different (I know the cable for the DOS card is a 4 headed cable as it breaks out the joystick via the cable, while the cable for the PC card is a 3 headed cable with the joystick port residing on the card itself). And of course, Apple had a 3rd style card for the Performa 630/640 DOS model. I haven't really played much with mine of that model, so I don't know what it has (actually, I seem to recall that it didn't use a loopback cable at all) And then there are always the Orange Micro versions, all bets are off with those. I've never really played with them. But maybe you are thinking of a different card then I am. Apple also had an Apple IIe card for the Mac that had a loopback cable. I don't recall what it has for connectors. And I have no idea what possible cards there were for the Apple II series, or what possible other similar cards were for the Mac beyond Apple's, Orange Micro's, and Reply's (which was really the same as the first Apple card as it was built by Reply and first only available from Apple, later to be available directly from Reply) -chris <http://www.mythtech.net>

20 years, 8 months

WinSystems LPM/MPM 7109 card? was Re: New Finds Today

by dwight.elvey＠amd.com

Hi Joe The 7109 was made by many manufactures and is a common A/D. It is a dual slope type. Quite accurate when comparing to a reference. It has one funny feature that isn't usually mentioned in the data sheets. If you get an over range, it will transfer some additional energy to the Auto-Zero capacitor. This can take many convertion cycles to recover from. When used with an input mux, make sure that you either have a wait after overrange or some way to clamp it below full scale. Even a single lsb of overscale has significant effect because of the amplification used to do the auto-zero. A single lsb of overscale can be over 100 lsb's on the next read, depending on the A-Z capacitor size. Not good when you are looking to get the most out of the 12 bits. As for the board, maybe just some tracing out will determine the addressing so that you can play with it. I have a 80C188 processor board for the STD with a Forth in Flash on it. I find Forth to be real handy for poking ( and peeking ) at unknown boards such as these. Dwight >From: "Joe R." <rigdonj(a)cfl.rr.com> > > Yesterday I picked up two shoebox sized units that were marked as >"enviromental units". However they had lights marked Tx, Rx, etc and a Comm >port. Inside it had a STD bus chassis with three cards installed. On has a >80C31 CPU, one has a Zilog Z0853004 comm chip and the other has a MAXIM >ICL7109CPL A/D convertor. The first two cards appear to be custom made and >are probably useless for anything except the system they were designed for. >However the third card (with A/D) is a standard commercail product and was >made by WinSystems and is their model LPM/MCM-7109. Does anyone have any >data on this card? It's not on WinSystems website and I tried to contact >them and ask about it but they were less than cooperative. > > Joe >

20 years, 8 months

WinSystems LPM/MPM 7109 card? was Re: New Finds Today

by rigdonj＠cfl.rr.com

Yesterday I picked up two shoebox sized units that were marked as "enviromental units". However they had lights marked Tx, Rx, etc and a Comm port. Inside it had a STD bus chassis with three cards installed. On has a 80C31 CPU, one has a Zilog Z0853004 comm chip and the other has a MAXIM ICL7109CPL A/D convertor. The first two cards appear to be custom made and are probably useless for anything except the system they were designed for. However the third card (with A/D) is a standard commercail product and was made by WinSystems and is their model LPM/MCM-7109. Does anyone have any data on this card? It's not on WinSystems website and I tried to contact them and ask about it but they were less than cooperative. Joe

20 years, 8 months

New Finds Today

by rigdonj＠cfl.rr.com

Went scrounging today and found a BIG pile of computers. MANY Dell PCs and a lot of IBM Power PCs. Brought home some of the PCs to check out and found that they all have P-III CPUs and ranged from 500 to 866 MHz. Some even had CD-RW drives! More interesting finds included two HP 9836Cs (the color version of the 9836), a HP 9000 380 (Probably top of the line for the HP 9000 200/300 series), a Sun Ultra 1 Creator 3D, a >>Hyundai<< Sparc model HWS-S310 (I had no idea Hyundai built andything like this!), a Matrox Shark 10/100/FX Ethernet switch, a SUN SparcStation 20, a HP drive array with hotswap drives, and one old PC with a very strange looking card in it. I'm going back tomorrow and pulling parts from the PCs that I didn't take. They're all going to a steel scrapper so I'm free to take anything that I want from them. Joe

20 years, 8 months

Wire recorders

by HLBebb＠webtv.net

Hello, I found your e-mail when I was searching for wire recorders. I thought perhaps you could help me. I am 85 years old and have some wire tapes of my children and would love to convert them onto cassette or CD. I live in Wsburg , Va. Would you have any contacts of anyone who could help me? Thank you.

20 years, 8 months

MS BASIC for a Panasonic HHC RL-H1400

by martinm＠allwest.net

I have accumulated a couple of Panasonic HHC RL-H1400 "Hand Held Computer"s. For a description, see: http://members.cox.net/obsoletetechnology/Panasonic_HHC.html Searching has indicated that a ROM "capsule" containing a version of MicroSoft BASIC was available. Does anyone have one of these capsules, or a dump of a ROM that can be written to a new ROM? The computers that I have came from insurance agents and have insurance software on the ROMs that came with the computers. The insurance ROMs are Motorola MCM 68764C and appear to be UVEPROMs. Thank you, Martin Marshall

20 years, 8 months

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test-drb March 2004