test-drb April 2018

test-drb@ccmp.vtda.org

128 participants
123 discussions

by couryhouse＠aol.com

https://www.bing.com/videos/search?q=castles+in+the+sky+radar&PC=EMMX03&ref… great saw,this on the 40 inch... Sent from AOL Mobile Mail

5 years, 9 months

Did anyone on the list get these tapes?

by aek＠bitsavers.org

https://www.ebay.com/itm/1372243559202 basic.p11 syslod.p11 rdt.p11 all from mid 1971 original RSTS? hope the person who got these knows what they bought

5 years, 10 months

TI System V?

by derschjo＠gmail.com

Anyone have any idea where one might track down a copy of TI System V for the S1500 series? I've had these two TI UNIX systems for awhile now, a TI S1505 and a TI S1507 (68030 and 68040-based, respectively). They came without hard drives or OS media and so they've basically been doorstops. I asked around about OS media back when I got them (in 2013) and at the time I got no leads; I'm guessing things probably haven't changed, but I figured I'd ask again just in case... Seem like nice machines, wish I could do something with 'em... - Josh

5 years, 10 months

Logic Analyzer software for the HP-IB/RS-232 bus pre-processor HP 10342B

by marc.verdiell＠gmail.com

This has probably been asked before, but does anyone have the software package that came with the HP-IB/RS232 HP10342 bus pre-processor for the HP1650 series Logic Analyzer (actually I have a 1670G)? It should have a config file and an inverse assembler file. I'm interested in the HP-IB files. Can't find it anywhere. - Marc

5 years, 10 months

IBM 5140 - schematics?

by anders.k.nelson＠gmail.com

Hey all, I have an IBM 5140 portable with a printer but I'd really like to use it as a terminal among other things. Any chance there's documentation available for that Centronics connector or another internal header with RS232 or whatever? =] -- -- Anders Nelson +1 (517) 775-6129 www.erogear.com

5 years, 11 months

Interest Check: Belden Thicknet 10base5 Ethernet Coax

by systems.glitch＠gmail.com

All, Per the recent discussion on thicknet/early Ethernet, I figured I'd see if there's any interest in cut-to-length Belden thicknet/10base5 Ethernet cable. I've got a local surplus guy who's got at least one 1100 foot roll. It's the real Ethernet spec stuff, sez so on the cable, and it has the bands to locate your vampire taps. If there's enough interest, I'll buy the spool off of him and cut it to length for whoever's interested in buying some. I can crimp N terminations on as well. Thanks, Jonathan

5 years, 11 months

Anyone have an HP 12661A DVS card manual, 12661-90004?

by glen.slick＠gmail.com

I don't see a manual for the HP 12661A DVS (Digital Voltage Source) interface card on bitsavers, or hpmuseum.net, or anywhere else. The only reference I have found is in a list of not scanned manuals here: http://rikers.org/hp2100/jeff/iocards/iocards2.txt ---------- 12661 DIG VOLT SOURCE ---------- MANUAL FOR DIGITAL VOLTAGE SOURCE PROGRAMMER INTERFACE KIT HP 12661A MANUAL NO. 12661-90004 APRIL 1971 [Cards #12661-6001 and 12661-6002, connector 02116-6178] This is the interface card that would be used in an HP 1000 to control an HP 6130A Digital Voltage Source. See Hewlett-Packard Journal, June 1968. There is the 14902A BCS driver as listed in 5950-9226_HP_Software_Catalog_Aug1973.pdf Source code for that driver is available as 14902-80001_Rev-A.src in the bitsavers HP_1000_software_collection Master Files, Type 4. Mainly just curious because I have a couple of HP 12661A interface cards without manuals that I have never tried to use and I was reminded about them when an HP 6130A made a brief appearance in Marc's latest Weird Stuff video.

5 years, 11 months

Restoring rubber keyboard on a logic analyzer

by paulkoning＠comcast.net

Gentlepeople, I have a Philips logic analyzer (PM3585) which is about 20 years old at this point. It seems to be basically functional except for the keyboard, which unfortunately is a critical part. This is one of those molded rubber type, with a circuit board behind the rubber that has contact areas made of carbon film (at least they are black in color) and on the back of each key a small cylindrical bump also coated with carbon. Some of the buttons work but most don't seem to even if I press hard. I've disassembled the keyboard, which was easy enough. Inspection shows no damage and no signs of corrosion or contamination. I wiped everything with isopropyl alcohol anyway. The result is no change in behavior. Any suggestions for what to do next? paul

5 years, 11 months

Identifying bad RAM on Amiga 1000 WCS board

by ethan.dicks＠gmail.com

Hi, All, I've been doing component-level diagnosis of a bad Amiga 1000 WCS board and since I was unable to find this information anywhere, I thought I'd post it to the list so that it's in the hands of more than one person. For an Amiga 1000 that starts up with a turquoise screen and never asks for Kickstart, it means that the WCS RAM test has failed. Common causes are one or more bad 4464 DRAM chips on the WCS board or a bad PAL. I don't happen to have the PAL equations but I did spend some time with a sick Amiga 1000, a Fluke 9010A and a cheap digital scope. There are hand-drawn schematics floating around but they don't appear to match the production hardware in either part placement or completeness (the schematics describe 2 PALs, DAUGCAS and DAUGEN, but the production hardware has two additional PALs, DPALCAS and DPALEN, for one specific example). If one has a Fluke 9010A and 68000 pod, one can test the WCS RAM by pressing [RUN UUT] and turning on the Amiga and waiting a second or two for the ROMs to set the right memory map bits to make the WCS writable. One can then do simple [READ] and [WRITE] tests to the Amiga at $FC0000-$FFFFFF and even run a [RAM SHORT] on part or all of that range (a RAM SHORT test on 256Kbytes will take more than a few minutes). The memory itself is a bank of 8 4464/50464 64Kx4 DRAMs at U1B-U1E and U2B-U2E, arranged sensibly in two banks of 128Kbytes. The chips in row 2 are the lower half ($FC0000-$FDFFFF) and the chips in row 1 are the upper half ($FE0000-$FFFFFF). The individual bits are arranged as follows: U1E/U2E $000F D0-D3 U1D/U2D $00F0 D4-D7 U1C/U2C $0F00 D8-D11 U1B/U2B $F000 D12-D15 For those that want to trace individual bits the order on each DRAM is pin-3, pin-2, pin-15, pin-17 which is slightly off the given order on the 4464 datasheet of 2,3,15,17. By way of verification, the WCS board I'm repairing failed the RAM test with bad bits at $F000 when I pulled the defective chip from position U1B. The same chip failed testing in a Ming HT-21 "Handy Tester" DIP logic and DRAM tester (but passed when tested as a 4416, because the fault was not in the first 25% of the memory cells). -ethan

5 years, 12 months

New cooling cans for 80386 and 80486

by sales＠elecplus.com

We bought these years ago in bulk. Turns out there are 78 left! New 40mm fans on a 50mm base. https://www.elecshopper.com/fans-and-heatsinks/silent-systems-fan-40-01154-4 .html Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com AOL IM elcpls --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

5 years, 12 months

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test-drb April 2018