test-drb October 2013

test-drb@ccmp.vtda.org

178 participants
205 discussions

by michael.99.thompson＠gmail.com

> > ---------- Forwarded message ---------- > From: "TeoZ" <teoz at neo.rr.com> > Date: Fri, 18 Oct 2013 21:01:55 -0400 > Subject: Re: Porn > Nice. I never seen a chain printer before. > You haven't lived until you have cleaned a printer chain. If you use a cheap ribbon, the fabric wears rapidly and fills the gaps between the segments in the printer chain. You need to pull out all of the chain segments, each about 1/2 inch long, clean each one, clean the housing for the printer chain, add a little lubricant, and reassemble everything. The ink on your fingers weara off in about a week. The ink will not come out of your clothes. -- Michael Thompson

11 years, 2 months

cctech Digest, Vol 122, Issue 25

by michael.99.thompson＠gmail.com

From: Liam Proven <lproven at gmail.com> > Date: Sat, 19 Oct 2013 15:13:19 +0100 > Subject: The U.Va. Computer Museum > This might give some pleasurable nostalgia... Sadly a few images seem > to be missing. > > http://www.cs.virginia.edu/about/museum/ > > -- > Liam Proven ? Profile: http://lproven.livejournal.com/profile > Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven > MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven > Tel: +44 20-8685-0498 ? Cell: +44 7939-087884 > They have an image of PDP-9 development tool paper tapes that the RICM needs for the PDP-9 restoration effort. I tried to contact the Webmaster and the professor listed on the WWW page. Neither will reply to my emails. If anyone has a contact there it would be nice to know if we could copy their PDP-9 paper tapes. -- Michael Thompson

11 years, 2 months

How Often to Run Old Systems to Protect Power Supplies?

by bobvines00＠gmail.com

How often do you recommend running old computer systems & peripherals (and other old electronics too) to protect the power supplies and other components from the "escape of magic smoke" when next powered up? For instance, I've got computers, peripherals, oscilloscopes, and "home electronics" from the early to mid '70s on up to 5-10 years ago. I've only let the magic smoke escape from one systems power supply so far, but how often should they be powered up for "preventive maintenance"? I'm guessing that the older systems with linear power supplies will need an attempt at reforming the capacitors with a Variac (or equal) before starting any "preventive maintenance" power-ups. After, at least, a visual inspection of the capacitors for damage is performed. What about the systems with switch-mode power supplies? Is there an easier way than isolating or removing the capacitors before "reforming" attempts are made? Any recommendations? I suspect I'm not the only one here with old systems that haven't been powered in years. Thanks, Bob

11 years, 2 months

Collection reduction

by schoedel＠kw.igs.net

I have come to realize that I am holding on to more than I can ever realistically hope to use or restore. Items are located in Waterloo, Ontario; definite preference given to local pick-up as well as anyone interested in several items. Here is an outline of some notable items: DEC: - PDP 11/45, various additional Unibus cards, 11/34 enclosure, multiple H960 racks. - PDP 11/73 in a half-height rack with Dilog SCSI enclosure - GenRad system with LSI11 CPU and Qbus/Unibus bridge - Terak 8510 (I think), no peripherals - Several MicroVAX (mostly II) in BA23 and BA123 enclosures; one in a half-height rack; mostly working when last tried - various qbus cards including third-party SCSI - 2 RL02 drives in a half-height rack - Various VAX, MIPS, and Alpha pizza boxes; mostly working when last tried - Multiple DEC Professionals, mostly 380, some working - DECmate III; working when last tried - multiple VT220 terminals, most or all working; one or two VT240 - LA36 DECwriter II - NOS DECcassette tapes for TU60 - many cables, keyboards, mice, monitors, etc. Data General: - Nova 2; known to have a front panel issue - Eclipse S/200; CPU appeared to work when last tried; various cards including core memory and interface to an early EMI MRI, plus some associated MRI cards - third-party Fairchild F944 machine Xerox: - Xerox 1109 "Dandetiger" (an 1108 / 8010 "Dandelion" / "Star" with FPU) with keyboard, monitor, mouse; ran Interlisp; needs at least a transformer for the boot controller - 2 x Xerox 1186 / 6085 with keyboard, monitor, mice; ran Interlisp; one working when last tried HP: - HP9810A; working when last tried - HP9825A; working when last tried - HP9845B; working when last tried - HP9000/216, 'battleship' keyboard, monitor - 2 x HP85 - various HPIB and HPIL peripherals - HP64000 portable; probably some pods Sun: - 2 x Sun 3/160 - Pizza boxes including Sparcstations and Ultra 1 - BriteLite IPX laptop Ikonas/Adage (see <http://www.virhistory.com/ikonas/ikonas.html>): - One RDS-3000 in 3/4 rack, 4 additional chassis, many boards (some with Lucasfilm ID stickers) IBM: - IBM 5322 - System/32 Datamaster - IBM 5150 - 16K PC Apple: - Mac XL / Lisa 2; no keyboard; two ProFiles, one working; I think I have the Lisa ROMs. - IIe, IIgs, various cards and peripherals - various 68K and PPC Macs Commodore: - PET 2001 (large keyboard) - various 64s, 128, 128D - Amiga 2500UX, 3000UX, 500 Miscellaneous other micros (Adam, Atari, ...) and workstations (IBM, SGI, ...). Miscellaneous test equipment including HP1615A logic analyzer, Tek 5112 scopes, frequency counter with nixie display. Some items were working when last turned on, but in general they should be considered in need of restoration. (Please check that your replies are on- or off-list as appropriate.) -- Kevin Schoedel <schoedel at kw.igs.net> VA3TCS

11 years, 2 months

PDP-8 FOCAL

by michael.99.thompson＠gmail.com

Thanks everyone for the pointers to FOCAL programs. Google wasn't much help. -- Michael Thompson

11 years, 2 months

Free: MS-DOS and early Windows software & docs (fwd)

by snhirsch＠gmail.com

Update: I made a quick pass through my storage area and there are more like 5+ _large_ tubs full. This includes perhaps a dozen or more shrink-wrapped packages. It will really pain me if I have to drag it to the transfer station. Steve -- ---------- Forwarded message ---------- Date: Sat, 19 Oct 2013 12:56:33 -0400 (EDT) From: Steven Hirsch <snhirsch at gmail.com> Reply-To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> To: Classic Computers Mailing List <cctalk at classiccmp.org> Subject: Free: MS-DOS and early Windows software & docs I am drowning here. If anyone wants it you can pickup free in Burlington, VT. Unfortunately I'm very much not retired and simply don't have the time to deal with shipping. There are probaby 2-3 large storage bins of boxed product, docs without software and software without docs - and, gasp, software WITH docs! There's a limit to how much one can accumulate and I think I'm past it :-). For extra credit: I can probably arrange to hand over a fair amount of miscellaneous junk, err, classic stuff if you have the room to take it. Take advantage of this special offer before the snow flies! Steve --

11 years, 2 months

new 6x0x board project

by LYNCHAJ＠YAHOO.COM

[note: this went out to the N8VEM mailing list. The proposed 6x0x schematic and PCB layout files are at http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&param=ECB%206x0x ] Hi! Sorry for the long message. I have a lot to say about a new N8VEM board project and am asking for your help. I think the 6x0x host processor, 6x0x IO mezzanine, and 6x0x ECB backplane are in need of a redesign and PCB respin. The three board "sandwich" approach has some major limitations and has led to some really weird and unnecessary complications. All the 6x0x PCBs are out so this is a great time to rethink the whole approach. Some builders and I have been discussing the topic and it dovetails nicely with some other improvements builders have been asking about. For example, it would be nice if we had a form factor that leveraged more easily stock ATX cases and power supplies. Also the ability to use 6U chassis with Eurocard backplanes (aka VME) form factor would help. Attached are notional redesign of the 6x0x board series into a single integrated board. It is still an ECB board but as a bus controller rather than as a peripheral like the 6x0x host processor. The new 6x0x board includes the dual CPU socket for 6502, 6809, and 6802 compatibility as well as all the IO from the 6x0x IO mezzanine (serial, parallel GPIO, timers, etc). As it is no longer a peripheral on the ECB bus it now includes a variant of the ParPropPort built in to provide full builder interface such as VGA display, PS/2 keyboard, SD mass storage, speaker, etc for complete standalone capability. Please review the proposed 6x0x schematic and PCB layout files and send me any changes and/or corrections. The new board is ATX and 6U chassis compatible. You can mount it in a stock ATX case and use a stock ATX power supply unmodified. Likewise with a 6U chassis. I am very interested in any discussion points on the 6x0x however please keep in mind this is an incremental step to addressing broader issues with the N8VEM collection of boards. You can still keep it out of a case altogether and set it on your workbench if you like or mount on some plywood. Assuming the new 6x0x form factor design is successful, I would like to adopt this form factor for other N8VEM boards to provide better and more functionally complete peripherals. Probably the next step would be to redesign the N8 to use the new form factor although it still remains to be seen if and how this works. We already have a notional schematic and PCB layout so the next step is to get some prototype boards. I will get four (4) prototype PCBs from Advanced Circuits as soon as the PCB completes some initial trace route optimization. Please keep in mind though the initial prototype boards will almost certainly not work as intended and will require extensive debugging, cuts and jumpers, dead-bugs, and all sorts of heinous, grisly PCB circuit modifications. As a result the initial build and test team has to be small and limited to the most experienced builders. If you recall the N8 and uPD 7220 GDC build and test phases then you'll know what I am referring too! If you have any questions or comments please feel free to ask. Thanks and have a nice day! Andrew Lynch

11 years, 2 months

Research Inc. Teleray Terminal

by kylevowen＠gmail.com

Hi all, I have a couple of 3511D terminals from 1976 or so. Both can send data just fine to my PDP-8/M or my laptop, but they refuses to receive anything now. Both worked several weeks ago, though they started to get a little flakey. I probed the MC1489 in one and found that the received signal looks very nice. After that, though, I haven't been able to test much more without a schematic. Tracing it out is difficult thanks to the opaque IC sockets. I've tried to ohm out where the output from the 1489 goes to no avail, other than to pin 20 of the DB-25 connector. Why would they be sending a 5V TTL signal out the RS-232 line? Does anyone have any information on this terminal? Some images can be found in this album: http://imgur.com/a/fDVDH Thanks, Kyle

11 years, 2 months

KA630 (MicroVAX II) print set available, TH50

by elson＠pico-systems.com

Trying to thin out my stuff again, I still have the MicroVAX II print set, as well as a TK50 that is a bit dirty, but probably repairable/cleanable. Also, a spare KA630-AA (M7606) CPU, as far as I know operational. Also, a KA650 with two M7621 memory boards. Anybody want to make an offer on this stuff? I also will eventually tear down the MicroVAX II that I ran for 21+ years in my home. I'll have to get an inventory of the boards. Jon

11 years, 2 months

Wyse-30 terminal keyboard - will it work with a Wyse-120 terminal

by mark＠wickensonline.co.uk

Will a Wyse-30 terminal keyboard worth with a Wyse-120 terminal? Thanks for the help, Mark. -- -- Mark Wickens http://wickensonline.co.uk http://declegacy.org.uk http://retrochallenge.org https://twitter.com/#!/@urbancamo HECNET: http://hecnet.eu, Email: HALO::MSW

11 years, 2 months

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test-drb October 2013