test-drb June 2008

test-drb@ccmp.vtda.org

194 participants
304 discussions

by hardware＠ees1s0.engr.ccny.cuny.edu

Hello Everybody, My HP 85 starts up with "Error 23 SELF TEST" but seems to work. Does anybody know how to get it to be more specific about what isn't working correctly? thanks, -kurt

16 years, 6 months

Anyone interested in early to mid 90s Mac software?

by oldcomps＠verizon.net

I've got a collection of various software packages for various Mac flavors that I need to get rid of. If there's any interest in such things I'll put together a list. -- Frank ------------------------------------------------------------------------- C. Frank Helvey email: cfhelvey at yahoo dot com President home phone: 540.947.2526 Montvale Software Services Inc work phone: 540.947.5364 Blue Ridge, VA 24064 cell phone: 540.529.3740 Classic Comps Email: oldcomps at verizon dot net

16 years, 6 months

Fixing a DEC Letterwriter (LA100)

by ajp166＠bellatlantic.net

> >Subject: Re: Fixing a DEC Letterwriter (LA100) > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Thu, 12 Jun 2008 05:00:42 +0100 (BST) > To: cctalk at classiccmp.org > >> I have since found the full print set on vt100.net, so I'm all set on >> that front. I've started tracing back from the logic controlling the >> LINE and CTS indicators but haven't found anything obviously wrong as >> yet. I have however read some funny-looking voltages off the 7406 in >> this part of the circuit: 11.something volts while the datasheet says >> 30. Could of course be down to my test equipment as I'm limited to a >> basic digital multimeter at the moment. > >The 7406 has what's called an 'open collector output'. The output pin is >connected to the colelctor of an NPN transsitor (the emitter being >grounded), but to nothing else inside the chip. What this means is that >the output pin is either low (transistor tuend on) or floating >(transistor turned off), it'll never be pulled high bu that chip. > >The 7406 can handle and external voltage oof 30V on the output (that is, >you could connect a resistor between the output pin and any voltage less >than 30V, in shich case that supply voltage essentially becomes the >'high' output voltage). But there's no reason why you _have_ to use 30V. >Any lower voltage is fine. In particualr, using this chip (and its >non-inverting brother, the 7407) to convert between TTL and 12V levels is >quite common, ans what I suspect is happening here. > >-tony Make sure the power supply is working. It's a multiple output deal and it's possible or even likely one output has gone away. Also that machine will error mode if any PS output fails. I have two working LA100ROs here and worked part of the program when I was at DEC. FYI the datasheet for the 7406 only give limits not how it will be used in the circuit. The 11V sounds about reasonable. FYI the common failyure modes for LA100 were Printhead, PS and drive mechanics [Motor and the sprague clutch for ribbon feed]. Logic board failures were commonly RS232 related (usually form really nasty ground loops >25V). The printer can be start in diagnostic and feature setting mode. It requires paper in the printer and a ribbon with a working printhead to see the result. Get the LA100 user manual as the serial interface does use CTS/ and RTS/ unless disabled. there are a bunch of DIP switched hidden under a flap in the printing area that set up some of the features. Allison

16 years, 6 months

Apple Lisa

by dm561＠torfree.net

Date: Wed, 11 Jun 2008 13:54:22 -0700 From: "Rick Bensene" <rickb at bensene.com> Subject: RE: Apple Lisa >Please apologize for my typo in my original message -- the $10K Lisa sold on eBay in 2004, not 1994. >Rick Bensene ---- Hrmph! I don't see why *we* need to apologize... m

16 years, 6 months

Last call for anyone wanting old AS/400 features, cables, printers

by oldcomps＠verizon.net

All: I have a collection of AS/400 parts all of which I need to get rid of. I'm in the process of scrapping out this stuff, so you have to let me know if there's anything here you want in the next week or its gone. Also, each item is provided for shipping charges. Any donations to help with my time would be appreciated. Its easier to scrap it out that to ship it, but I hate to throw away working hardware... a problem a lot of people on this list have, I think! :) I am pretty much clueless on AS/400 stuff, so if you see something here that doesn't make sense, ask. Features; the busses may still be available. I have cables for these too: 9406-5010/5030 IBM I/O Card Unit Feature (rackmount bus for AS/400) 940x-6019 IBM Card for 5030 feature (bus controller?) 940x-6031 IBM 2 line communications ADAP card for 5010/5030 bus 940x-6040 IBM twinax workstation controller card for 5010/5030 bus 940x-6130 IBM Communications I/O processor card for 5010/5030 bus 5042 IBM Expansion chassis - AS/400, rackmount. Includes some blank panels. Has power controller cards. 940x-2621 IBM removable media device attachment for 5042 bus 940x-2623 IBM 6 line communications controller for 5042 bus 940x-2626 IBM Token ring adapter 16/4 Mbps for 5042 bus 940x-2684 IBM Optical bus adapter (< 266 Mbps) for 5042 bus 940x-6050 IBM Twinax workstation controller for 5042 bus 940x-6140 IBM Twinax workstation controller for 5042 bus 940x-6141 IBM ASCII workstation controller for 5042 bus 940x-6501 IBM DASD Controller for 5042 bus 940x-6501 IBM DASD controller; in box, possibly new/unused, for 5042 bus I also have these two tape drives: 7460 Decision Data Corp Dual 8MM tape drives for AS/400, with 6860-CTRL from IPL Systems Inc. Rackmount, includes rack hardware, SCSI cable. 9348-001 IBM/remanufactured 9 track reel tape drive, SCSI. Includes cable and rackmount hardware. This unit has suffered damage to the front cover; its not known if the unit still works at this time. Twinax printers. 4224-01 IBM These printers that don't seem to work. 6262-T12 IBM Parts only, too big to ship. Telex 225 Genicome/Telex Parts only, already disassembled These Twinax and Token Ring networking parts, including twinax cables and some new twinax covers in bags: 5294 IBM 5294-43185 twinax controller with V.35 interface 2452259 EC 834326 IBM Modem to 5294 controller cable 299AT, OR 3C510013 STAR-TEK/3COM ACTIVE HUB, RJ45 CONNECTORS IC028-A STAR-TEK/3COM 299AT HUB EXPANSION MODULES, RJ45 CONNECTORS, WITH POWER SUPPLY 828AT STAR-TEK Intelligent multistation access unit CPA2501 Cisco CiscoPro access unit. Has 2 cards installed - SMART SM536X29001C457 102396-29 memory expansion, and SM732C1000B-12 093096-13 flash memory card for firmware. 3C510511B 10511B-00 3COM SuperStack II Token ring hubs. 7 units include a connecting cable to interconnect them to another SuperStack II hub. All have power cords. Operational until AS/400 deinstalled. 3C16900A 3COM SuperStack II Switch 1000 main assembly 1690-010-000-3.01 15013002 Madge Pccard token ring adapter, ringnode Mk2, 16/4 Mbps, with cable 15013002 Madge ringnode Mk2 as above without cable 34L1499 IBM Pccard token ring, 16/4 Mbps, with cable 933929 IBM Pccard token ring with cable 3C389 3COM Pccard token ring, 16/4 Mbps, without cable J3264A HP JetDirect 500X token ring print server, w/ power supply 309938-002 Intel Netport Express XL token ring print server, no power supply Intel Netport ExpressPRO token ring print server, w/ power supply ------------------------------------------------------------------------- C. Frank Helvey email: cfhelvey at yahoo dot com President home phone: 540.947.2526 Montvale Software Services PC work phone: 540.947.5364 Blue Ridge, VA 24064 cell phone: 540.529.3740 Classic Comps Email: oldcomps at verizon dot net

16 years, 6 months

Fixing a DEC Letterwriter (LA100)

by oldcomps＠verizon.net

Steve: I don't have the doc set for fixing a LA100, but I believe I do have a working LA100 that I need to move out. I should have another one or two LA type printers, but w/o the keyboards. -- Frank ------------------------------------------------------------------------- C. Frank Helvey email: cfhelvey at yahoo dot com President home phone: 540.947.2526 Montvale Software Services PC work phone: 540.947.5364 Blue Ridge, VA 24064 cell phone: 540.529.3740 Classic Comps Email: oldcomps at verizon dot net ----- Original Message ---- From: Steve Maddison <steve at cosam.org> To: cctalk at classiccmp.org Sent: Thursday, June 12, 2008 5:02:54 AM Subject: Fixing a DEC Letterwriter (LA100) Hello all, I have a half-dead Letterwriter 100 KSR here I'd like to get working again. I get a short buzz from the paper feed motor at power-up but instead of flashing all it's indicator LEDs, both CTS and LINE stay illuminated. There's no carriage movement and the keyboard does nothing either. The basic vital signs are OK but I'm stuck without a service manual or schematics. Does anyone have access to these docs? I'd of course also be interested to hear of any common problems and/or things to check before I dive into all-out mending mode... Cheers, -- Steve Maddison http://www.cosam.org/ "The great thing about standards is that there are so many to choose from."

16 years, 6 months

H7821 Power Supply

by vrs＠msn.com

I recently acquired an H7821-00 power supply, and I'm wondering if has any technical drawings or specifications for it? Or at least a pinout for the 14-pin connector? Thanks, Vince

16 years, 6 months

Anyone interested in early to mid 90s Mac software?

by oldcomps＠verizon.net

To everyone: I've had three folks come forward so far interested in this s/w, so I'll come up with a list of what I have and post it to the discussion list, hopefully sometime this next week. All of it will be available first come first served for the price of shipping. Donations for my time to pack it up will be appreciated. The software I have is geared towards art production for prepress work, not programming. There should be some general office apps too. -- Frank ------------------------------------------------------------------------- C. Frank Helvey email: cfhelvey at yahoo dot com President home phone: 540.947.2526 Montvale Software Services PC work phone: 540.947.5364 Blue Ridge, VA 24064 cell phone: 540.529.3740 Classic Comps Email: oldcomps at verizon dot net ----- Original Message ---- From: Frank Helvey <oldcomps at verizon.net> To: cctech list <cctech at classiccmp.org> Sent: Wednesday, June 11, 2008 11:55:12 AM Subject: Anyone interested in early to mid 90s Mac software? I've got a collection of various software packages for various Mac flavors that I need to get rid of. If there's any interest in such things I'll put together a list. -- Frank ------------------------------------------------------------------------- C. Frank Helvey email: cfhelvey at yahoo dot com President home phone: 540.947.2526 Montvale Software Services Inc work phone: 540.947.5364 Blue Ridge, VA 24064 cell phone: 540.529.3740 Classic Comps Email: oldcomps at verizon dot net

16 years, 6 months

invading varmints

by cclist＠sydex.com

> Date: Thu, 5 Jun 2008 15:57:29 -0700 (PDT) > From: Chris M > I arguably my first vintage computer invaded by > apparently teeny tiny critters once! I had the box, a > TI PC, stuck in my parked van for a winter anyhow. Thank your lucky stars that you didn't suffer the fate of one of our customers several years ago. He'd pulled out his Zorba from storage, opened the door of the A: drive and was bitten by several irritated brown recluse spiders that had decided to call his luggable "home". Out of curiosity, does anyone take any sort of precautions when rescuing an old piece of equipment that's been in storage for awhile? I can imagine that if brown recluse spiders can feel at home inside a computer, black widow spiders also would, not to mention cockroaches, etc. If you're going to fumigate a piece of equipment, what's the least destructive (to the equipment) fumigant? Cheers, Chuck

16 years, 6 months

IBM PC/XT/AT/PS/2s and old Apricot kit up for grabs

by mikewalder＠yahoo.com

Hello fellow Computer Collectors, I have recently got married and moved house, and now no longer have the space for my computer collection: http://www.mikewalder.com/mcm.? I have found new owners for my HP and Digital kit, but still have much of the rest left.? This is all now sitting in storage, costing me ???, and the preasure to move it all is getting greater.? So, the offer is there.? If anybody on this list would like to come down to Wokingham (UK) and collect some or all of the machines, I'll be glad that they are not going on the scrapheap. I have everything on "Mike's Computer Museum" website, except the DEC, HP, Merlin, Sirius, Altos?or Exorcet stuff, I think.? But to summarize I have a large collection of IBM equipment including PCs, PC/XTs, ATs, XT/286, PS/2 model 30 (8086 ISA), model 50 (286 MCA), 55sx (316sx 16 MCA), 60 (286 MCA tower), and 80 (386DX MCA tower).?? I also have some ACT?Apricot stuff.? Drop me a mail directly at mikewalder at yahoo.com if you are interested.? I am after no money, just the willpower and time to come and collect it, and the warm feeling that they are going to someone who will make use of them. Regards, Mike Walder.

16 years, 6 months

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test-drb June 2008