test-drb August 1999

test-drb@ccmp.vtda.org

161 participants
565 discussions

by ard＠p850ug1.demon.co.uk

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25 years, 4 months

Are tatty boxes worth keeping?

by Glenatacme＠aol.com

Tony Duell inquired: > > A couple of months back I bought a second-hand Commodore 1570 disk drive. > > It came in the original box, which is, alas, in very poor condition. The > > polystyrene is cracked and has chunks missing. The cardboard sleeve is > > torn/ragged. > > > > Is there any point in keeping it? I don't normally care about the packing > > boxes for computers, but I know some people do. Also, I believe the 1570 > > is not the most common CBM drive, so presumably the boxes for them aren't > > that common either. Sellam Ismail replied: > I think its worth holding onto because its a part of the history of the > product. It tells a bit about the company at that point in its life in > terms of the packaging design and such. If the styrofoam is making a mess > then perhaps it'd be best to throw that out, and then maybe fold the box > up and stick it away somewhere to preserve it for posterity. In general, Tony, I agree with Sam. The packaging can provide insight into both the packaging technology of the times and the marketing strategy (some of the claims on those old boxes are outrageous, and the graphics can be interesting, too!). Additionally, collectors will certainly pay a premium for an item which includes some or all of the original peripheral "trash." The foam does tend to break down, especially if it is in contact with other plastic items such as cables, etc, but it is still worth keeping. My solution is to wrap the foam -- and each item it contains -- in _stable_ plastic bags, and then stash the whole mess in a larger cardboard box. This of course requires a certain abundancy of storage space . . . Glen Goodwin 0/0

25 years, 4 months

3Com 3Stations

by peter.pachla＠vectrex.freeserve.co.uk

Hi Tony, >No, the 286 has 24 address lines.... Thanks for clearing that up - I'd mistakenly thought it had 22. >....This machine (p850ug1) started life as a PC/AT. Although it now >has a 486 processor.... How'd you do that? Sounds like one heck of a hack.... TTFN - Pete. -- Hardware & Software Engineer. Sound Engineer. Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC) peter.pachla(a)virgin.net | peter.pachla(a)vectrex.freeserve.co.uk | peter.pachla(a)wintermute.free-online.co.uk | www.wintermute.free-online.co.uk --

25 years, 4 months

FW: FS: rx-50 drive, digital mouse / delni

by kyrrin＠bluefeathertech.com

Seen on Usenet. Anyone want this stuff, get in contact with the seller directly. Thanks. -=-=- <snip> -=-=- On Sun, 08 Aug 1999 17:58:09 GMT, in comp.os.vms you wrote: >>From: midigear(a)gis.net (midigear) >>Newsgroups: ne.forsale,comp.os.vms,comp.sys.vax >>Subject: FS: rx-50 drive, digital mouse / delni >>Date: Sun, 08 Aug 1999 17:58:09 GMT >>Organization: Posted via Supernews, http://www.supernews.com >>Lines: 17 >>Message-ID: <37adc523.20592952(a)news.gis.net> >>Reply-To: midigear(a)gis.net >>X-Complaints-To: newsabuse(a)supernews.com >>X-Newsreader: Forte Free Agent 1.11/32.235 >>Path: news1.jps.net!news.pbi.net!206.170.175.2!ns2.foothill.net!oronet!news.gv.tsc.tdk.com!newsout.pdxfiber.net!cyclone.bc.net!feed.newsfeeds.com!newsfeeds.com!nntp-relay.ihug.net!ihug.co.nz!remarQ60!rQdQ!supernews.com!remarQ.com!corp.supernews.com!not-for-mail >>Xref: news1.jps.net ne.forsale:276 comp.os.vms:738 >> >>LAST CALL >> >>- digital delni hub (with a dozen connectors) >>- digital mouse model VS10X-EA Rev 3a >>- miscellaneous related items >> (VMS, a couple dozens floppies)... >>- RX-50 disk drives (2 drives in one assembly) >>- long keyboard/monitor cable (3 BNC cables (RGB) and 1 keyboard on >>one end, multipin on ther other) >> >>for pickup in somerville (boston) / davis square >> >>please make an offer, I'll probably take it! >> >>I CANNOT ANSWER ANY TECHNICAL QUESTIONS ON THIS >>- ALL ITEMS AS IS -=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies -- kyrrin (at) bluefeathertech [dot] com Web: http://www.bluefeathertech.com "...No matter how we may wish otherwise, our science can only describe an object, event, or living thing in our own human terms. It cannot possibly define any of them..."

25 years, 4 months

Are tatty boxes worth keeping?

by jeff.kaneko＠juno.com

On Sun, 08 Aug 1999 22:22:45 -0500 Chris Cureau <cureau(a)centuryinter.net> writes: >> Oh yeah, like the time Commodore shot itself in the foot claiming on >>the outside of the box that the C64 could run CPM programs! Of course >>then the FTC stepped in. . . . > > The Commodore 64 _could_ run CP/M programs...provided one had the >optional Z80 cartridge...though I never tried myself. :-) The 128 was >the first Commodore machine to actually boot CP/M disks with a 1571 drive, >if I remember correctly. > >Just my two cents, >Chris > You are absolutely correct! The Z-80 cart was originally shelved when Commodore decided it was taking too much time and engineering effort to develop. The FTC forced Commodore to produce the carts or be sued big time. They produced enough to satisfy the FTC requirements, and that was the end of that. CPM carts are quite scarce as a result. (And a bit buggy). Jeff > ___________________________________________________________________ Get the Internet just the way you want it. Free software, free e-mail, and free Internet access for a month! Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

25 years, 4 months

Spiffy Little Hamfest Find

by edick＠idcomm.com

The supply connections on the schematic are +24, +12 , +5, Gnd, and -12. The +24 is shown with a separate return from that of the other supplies. It seems to me that there is a considerable tolerance on the +24, but that's a common supply voltage. The thermal printer appears to be a TI EPN-9120, which might be just as happy with 18 volts, but might require a different set of passives at that voltage. I doubt you'll hurt anything with a voltage as low as 18Vdc, though the stepper may want more. When I used this mechanism, I usually AC-coupled the stepper so the circuitry didn't heat when the printer was idle. All indications are that the AIM uses a couple of parallel port bits to provide the ultra-slow (110 bps) interface to the TTY via some transistors and TTL gates. It's not the usual isolated 20mA interface. However, TXD is on J1/pin U and its return is on S, while the RXD from the TTY KEYBOARD and its return are on J1, pins T and R, respectively. If you want to improve anything at all, I'd start by combining the input clock with the R/nW signal to create the write strobe to the RAM memories. That will provide considerably better hold time, which 2114's definitely require. I normally 'NAND' the Phase-0 and Phase-2 clocks with inverted R/nW to accomplish this. There's a single-step switch and a reset switch, as well as the one that selects the TTY keyboard. I wouldn't be afraid to "play" with this one. It looks like it can handle reasonable abuse. Dick -----Original Message----- From: Hans Franke <Hans.Franke(a)mch20.sbs.de> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Monday, August 09, 1999 7:24 AM Subject: Re: Spiffy Little Hamfest Find > >>>Geee, what a neat beast - I'm searching a cased AIm (or an AIM >>>case) for years. >>>> I haven't powered it up yet since it seems to want 12 and 24 >>>> volts and I don't have a 24 volt supply handy. >>>Wasn't it +5 and +/-12 ? It's a long time ago. > >> Yes, 5 VDC and plus and minus 12 VDC. The -12 is only used for a comm >> port I think. The + 12 is used for the comm port and the printer. You CAN >> run it without the plus and minus 12 VDC but you'll lose the comm port and >> printer. You MUST have the 5 VDC. > >Exact, the 12V are also needed for the TTY. > >>>> Does anyone have the pinouts for the expansion and application >>>> connectors on this little guy? >>>Try Richards page - he did a good job and scanned a lot of the Manuals. >>>http://highgate.comm.sfu.ca/~rcini/classiccmp/my_docs.htm > >>>> Also, there's a switch that lets you switch between keyboard and >>>> tty but I see no place to connect a tty, not even a little dual >>>> inline connector or anything appropriate. Clues? >> >> I don't know. Maybe it uses the keyboard connector or the expansion >> connector. You should be able to trace the KB-TTY switch out if nothing >> else. BTW some of my boards don't have the switch. The traces are there and >> there's a jumper soldered between two of them. > >> >There are two edge connectors - one supplys the system (extension) >> >Bus, the other offers the 'user' port, including a 20mA TTY (like >> >the KIM) > >> Mine say "J1 Application" and "J3 Expansion". The keybaord connects to >> "J4". "J2" connects to the printer. I don't know where the comm port is. >> Have you looked at the stuff on Rich's web site yet. The manuals there >> should tell where it is and how to use it. > >J1 Application == 'user' port, including the com line and the TTY line >J3 Expansion == system bus > >Gruss >H. > >-- >Stimm gegen SPAM: http://www.politik-digital.de/spam/de/ >Vote against SPAM: http://www.politik-digital.de/spam/en/ >Votez contre le SPAM: http://www.politik-digital.de/spam/fr/ >Ich denke, also bin ich, also gut >HRK

25 years, 4 months

IBM Laptop Keyboards

by danburrows＠mindspring.com

The local Hospice organization is having their annual flea market. One of the workers pulled me aside and asked if I knew anyone that could use a box of 16 brand new replacement keyboards for IBM laptops. Neither of us know what model they are for. He gave them to me to sell as they would have been dumpstered. If anyone is interested please contact me off list for shipping etc info. I will be asking for 2 checks. One to Hospice and one to me for actual shipping costs. The one to Hospice is for what you feel they are worth. Keep in mind they are a non profit organization and the flea market is how they raise funds for the local home. The IBM P/N 07G1103 FRO P/N 07G1735 EC No. C81240 Then under the bar code is *1M630037331 They do not have the pointer nub in the middle of the keyboard so I know they are for an older model. Might even meet the 10 year rule.:) FWIW almost all of the PC related stuff that I get in the course of my business gets donated to Hospice for this annual flea market. Dan

25 years, 4 months

Tektronix 4634 hard copy unit

by rigdonj＠intellistar.net

Hi, Is anyone familar with this unit? I know what it is, it's a screen printer. I have a catalog that describes an earlier model but not the 4634. Does anyone know if this one also requires the dry silver paper? Will it work with the Tektronix 4051 computer? Exactly how are these connected to the system? I found one of these in a junk yard. It's still new in box. I'm wondering if I should grab it to add to my Tek 4051. Joe

25 years, 4 months

OT: Power Supply voltage for Dayna Etherprint-T plus? (resolution)

by mtapley＠swri.edu

Anybody who started with this thread (and many thanks to Mike Ford), I got a second hand wall-wart power supply which puts out 9v dc 500 mA. The connector on the wall-wart cable has a socket for a central pin and an outer conductive barrel. The socket is +, the outer barrel is - according to the power supply label. I plugged it into the Etherprint-T Plus and it ran fine for at least 5 minutes (after which I unplugged it and went to bed). I'll let you know if it causes trouble later. YMMV, of course, but as far as I can tell Mike's forwarded post took care of me perfectly. Thanks, Mike! - Mark

25 years, 4 months

DEC board anyone?

by kyrrin＠bluefeathertech.com

Cleanup efforts have unearthed a Unibus board: Specifically, M8200-YB. If no one speaks up for it, I'll just put it out at my garage sale on the 28th/29th. Otherwise, first person to offer $5.00 (covers packing and shipping) gets it. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com Amateur Radio: WD6EOS since Dec. '77 "Our science can only describe an object, event, or living thing in our own human terms. It cannot, in any way, define any of them..."

25 years, 4 months

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test-drb August 1999