test-drb December 1998

test-drb@ccmp.vtda.org

168 participants
844 discussions

by fmc＠reanimators.org

Christian Fandt <cfandt(a)netsync.net> wrote: > Anybody have experience with using normal xerographic copy paper instead of > the HP-specified Thinkjet paper? If so, how are the results? It depends on the cartridge, or more precisely the ink in the cartridge. When the Thinkjet first came out, there was only one type of cartridge and you were encouraged to use the special Thinkjet paper -- plain paper would work but didn't absorb the ink as well, and so the printing would be sort of smeared but legible. Later, HP came up with plain-paper cartridges and sold both flavors. I don't know whether they still sell the cartridges for Thinkjet paper, but I guess that if you can get the paper you can probably get the cartridges too. They are the same cartridges as for the QuietJet printers (same idea but wider carriage) so I'd expect you can still get them in office-supply stores. -Frank McConnell

26 years

Latest Project: homebrew paper tape reader

by dcoward＠pressstart.com

Richard A. Cini, Jr. said: > I saw a project in one of my old Bytes for a hand-pulled paper tape >reader. Very simple - 9 photodiodes, a light, a latch, a pulse-stretcher, >and some guide posts. > Well, here's the parts I have lying around: a BasicStamp-II, two R/C >servos modified for constant running, a few switches, and photodiodes. > If I get this thing working over the Christmas holiday, I'll post a >construction article. > Any recommendations for rubber pinch rollers? I'm thinking rubber >stoppers from a plumbing supply shop. These are pre-drilled and come with a >washer, bolt, and wing nut. FWIW, I have a "store bought" manual tape reader about the size of a small candy bar. The circuit board inside has the row of detectors (9 in all), and two hex TTL bus driver ICs, and that's it. On the outside, a piece of black tape with 9 holes punched in it, covers the detectors. Over this is a strip of clear plastic supported by four very short nylon stand-offs. I insert the paper tape under the plastic and between the stand-offs. That's all thats needed to keep the paper tape alined and flat against the detectors. Room light is used to detect the holes. The output is 9 bit parallel, which I connect to a VIC-20 user port with the spocket hole output going to the interrupt line for that port. Unfortunately writing the software to read tapes is one of those projects that I have no gotten back to. As far as lighting goes, the Heath H-10 uses a neat trick. In it they use a automobile tail light bulb which has a filament about an inch long. They position the bulb so that the filament is directly over, alined with, and parallel to the row of detectors. This gives uniform illumenation to all the detectors. ========================================= Doug Coward Press Start Inc. Sunnyvale,CA =========================================

26 years

Looking for analog owners

by dogas＠leading.net

>manufacturers, programming tips, histories, books, >pictures of machines, etc. I know you're out there! No analog computers, but one cool book 'Basics of Analog Computers,Information, Experiments, and Applications' 1963, Bureau of Naval Personnel, Navpers 92699A - Mike: dogas(a)leading.net

26 years

Looking for analog owners

by dcoward＠pressstart.com

I would like to make a list of fellow analog computer owners that are interested in sharing information about manufacturers, programming tips, histories, books, pictures of machines, etc. I know you're out there! E-Mail me. ========================================= Doug Coward Press Start Inc. Sunnyvale,CA =========================================

26 years

Rescue a pair of RK05-j's in Portland, OR

by nabil＠teleport.com

I have a pair of RK05-j's that would love to be rescued. They are in Portland, Oregon, and are each in a DEC rack by themselves. The racks need to go with them. If you can't pick them up, the only way to have them shipped would be to have someone pick them up, as I can't transport them anyplace. Free, but act quickly, as they are in my way and probably won't be around much past this week. Reply directly via email, I don't read two out of the three places this is posted to. -- Aaron Nabil nabil(a)teleport.com

26 years

FSOT: Microchannel PC cards

by rigdonj＠intellistar.net

More house cleaning! Found these two cards; IBM Auto 16/4 Token Ring Adapter/A (FRU 94X1756) and a 300/1200/2400 Baud MODEM (FRU 53F7748). Both are original IBM cards. I'll take $20 + shipping for the pair or trade for goodies for my Altair, Tek 4051 or HP stuff. Joe

26 years

Looking for group archive

by fauradon＠pclink.com

Thank you Francois >Kevan Heydon has an archive site: >http://www.heydon.org/kevan/mlists/classiccmp/ > >Regards, Chris

26 years

Indexing Byte and using BibTex

by rcini＠msn.com

Does anyone have any experience using BiBTex on the PeeCee? I downloaded the Byte indices from 1975 to 1990, but I was not able to D/L any of the non-Unix tools from the site I was on. Any recommendations as to tools are welcome. Thanks. [ Rich Cini/WUGNET [ ClubWin!/CW7 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ http://highgate.comm.sfu.ca/~rcini/classiccmp/ [ http://highgate.comm.sfu.ca/~rcini/pdp11/ <================ reply separator =================>

26 years

HX20 (was: Re: Just bought this . . .)

by kurtkilg＠geocities.com

> > The HX20 printer is quite interesting. It's got 4 print solenoids/pins on > > a little 'shuttle', spaced 5 characters apart in the same horizontal > > line. A motor/scroll cam assembly wobbles this backwards and forwards > > across the paper and moves the paper up one dot line for ever complete > > movement of the shuttle. The HX20 electronics sends appropriately timed > > pulses to the solenoids to put dots on the paper. It is an impact > > printer, of course. May I ask, why do this when it's probably easier to use 9 vertically aligned pins like the rest of the civilized dot matrix world? (Except for engineering chauvinism, that is) ---------------------------------------------------- Max Eskin | kurtkilgor(a)bigfoot.com | AOL: kurtkilgor

26 years

Saving vs. Shipping (was: Re: "Single instance" machines, Tek 8000

by dogas＠leading.net

>or across the states... that's my dilemma... :-( ok, so I'm considering a rescue... ;) Can someone tell me about these machines (and how big they are, etc....) Initial internet query's yield nothing Thanks - Mike: dogas(a)leading.net

26 years

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test-drb December 1998