test-drb November 2006

test-drb@ccmp.vtda.org

220 participants
452 discussions

postage stamps with computers or on computing?

by legalize＠xmission.com

Does anyone here collect stamps and has amassed a collection by theme on computing? -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html>

18 years, 1 month

free DEC video cable

by vax9000＠gmail.com

The computer side is 15 pin femail D shape connector. The other side has GRB connectors and one 4pin telephone style port which might be a keyboard port. $5 shipping if you are in the US. Dirty, but no physical damage is observed. Not tested and I don't know what system it was used with. See attached photo. vax, 9000

18 years, 1 month

semi-ot: are zip drives being phased out?

by chrism3667＠yahoo.com

goofy question, but what sounds easier, a scsi or cflash type interface for a 2K? There probably are any # of scsi designs that could be modified. ____________________________________________________________________________________ Sponsored Link Mortgage rates near 39yr lows. $420k for $1,399/mo. Calculate new payment! http://www.LowerMyBills.com/lre

18 years, 1 month

Fwd: C-64 for cctalk

by tpeters＠mixcom.com

>Subject: C-64 for cctalk >Date: Thu, 9 Nov 2006 10:04:37 -0600 >Thread-Topic: C-64 for cctalk >Thread-Index: AccEGMGi6nldNWUoQnSxvF+J8ptvVg== >From: "PETERS, THOMAS $SBLD$" <tp7156 at att.com> >To: <tpeters at mixcom.com> >X-OriginalArrivalTime: 09 Nov 2006 16:04:37.0936 (UTC) >FILETIME=[C1BB6B00:01C70418] >X-TM-AS-Product-Ver: SMEX-7.0.0.1433-3.6.1039-14802.003 >X-TM-AS-Result: No--5.457100-0.000000-31 >X-Spambayes-Classification: ham > >[24-Oct-2006] FOUND: NIB Commodore 64C (white case)Sitting on closet >shelf since I can't remember when .Has PS cube plus all cables , etc . >No Monitor or Floppy Drive just Computer. If interested make an offer . >I would like to trade for a New SK-410 socket. Will talk about anything. >Joe Chastain , N4JC via josw at bellsouth dot net . > >http://www.arrl.org/RadiosOnline/ads.html?ordby=&wanted_category=Computers%… > > >Thomas M. Peters >ATT LD Sr. Network Services Mgr >N9QQB (6m/2m/70cm) [Bachelors] Nowadays, all the married men live like bachelors, and all the bachelors like married men. --Oscar Wilde --... ...-- -.. . -. ----. --.- --.- -... tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio) "HEY YOU" (loud shouting) WEB ADDRESS http//www.mixweb.com/tpeters 43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User 385531

18 years, 1 month

old DEC software

by compoobah＠valleyimplants.com

For the most part, no software is available because DEC/Compaq/HP hasn't given permission for redistribution (other than the implicit one in your being allowed to borrow someone's VMS set with a valid Hobbyist license). The rumors I've heard indicate that OSF/1-DIGITAL Unix-Tru64 is "encumbered" and so is unlikely to ever be freely released. The GossipNet indicates that this (encumberances and royalty payments) is why the "Enthusiast" license is $100 instead of the VMS program's $0 (or $30 if you want the disk). Sadly, Alpha died at the end of October and the enthusiast Tru64 program likely died with it. Ultrix seems to be a slippery beast, though, and pops up from time to time on the Internet, in both VAX and MIPS forms- look around.

18 years, 1 month

Need Docs for XT RAM Board...

by alhartman＠yahoo.com

I'll take a look. But I think all four rows are soldered in. Thanks!!! Al > If it's an IBM XT mainboard, there's an easy way to do this (and not use > up any expansion slots). > > Put 41256 chips in banks 0 and 1, and 4164s in banks 2 and 3 on the > mainboard. Put a 74S158 (or 74F158) multiplexer chip in the emptu socket > at the front right, pointing the same way as the chips around it. Set the > DIP switches for 256K RAM, and solder a jumper wire between pads E1 and E2. > > That's it. You have a 640K XT mainboard. > > -tony

18 years, 1 month

cctech Digest, Vol 39, Issue 13

by roger.holmes＠microspot.co.uk

On 8 Nov, 2006, at 19:38, cctech-request at classiccmp.org wrote: > > Yes, that is infact, the Apple Dot Matrix Printer (aka ADMP) which is > identical to the ImageWriter, except that it works over a VIA 6522 > parallel port instead of the serial port that the ImageWriter uses. > They are all versions of the C. Itoh 8510. I'm not familiar with the > DEC LA50, but it's very likely that, it too, is a C. Itoh. My brother has a couple of these, I had both connected up to an Apple ///, which acted as a cash register in my father's ironmongery shop. One was for printing customer receipts and one for printing bar code labels. The computer had an old till drawer attached and a one bit output from the Apple /// operated a solenoid to open the drawer. There was a bar code reader for the Apple ][ which I reverse engineered the software for to made it work on the Apple ///, it just had a one bit input and lots of clever timing code, interrupt driven on my version if I remember correctly. I translated the whole lot for Lisa (while had one or two parallel cards), and the software was definitely interrupt driven there. > > The Inkjet printer for the Lisa is the Canon PJ 1080A. I wish I had > some real docs for this printer, but I don't. I had one of these too but it seems I put the manual back in the box with the printer, which has of course been chucked. Nearly all the other printers and plotters I've had on loan in the 80s and 90s (for writing drivers for) I managed to hang on to the manuals, but the Cannon (which we had to buy) is not with them. > Lisa's LisaDraw routines > (later rewritten in 68000 assembly and ported to the Mac and > renamed as > QuickDraw) do support color, I am fairly sure it was called QuickDraw on the Lisa as well. I think I still have two really thick binders for the Lisa programming environment somewhere. I remember writing my own code to do pull down menus in QuickDraw, CopyBits-ing the pixels the menu was going to cover up to an offscreen buffer, bringing up the menu, highlighting the items as the cursor went over them and reinstating the pixels after the cursor was released. Why Apple did not make these routines available I don't know. I chucked a lot of code away when we moved over to Macintosh. Most of the early Mac data structures were handle based but QuickDraw's GrafPorts remained pointer based right through to core graphics and Cocoa. > although its display is 1 bit black and white, > so, if you print a graphic that has color on this printer, you'll > get color. > I believe these were 16 colors, so 4 bit. There were just eight predefined colour names, and these mapped onto constants which were masks in both RGB and CMYK colour spaces. You could assign the foreground(paint,fill etc) or background (erase) patterns to any one of the eight colours. > > There was also a Daisywheel printer for the Lisa too, which was very > interesting, since it supposedly could also print graphics too > according > to the advertisements. I can imagine that it must have used a single > period character to poke dots, so it must have been super slow. I > couldn't find any real docs for it however. > Not practical for graphics. I remember seeing a daisywheel doing inverse text, bashing away with the vertical bar and then using the erase part of the ribbon to print the white text.

18 years, 1 month

4-way switches (was Re: New monitors on old machines)

by sdc695＠yahoo.com

der Mouse <mouse at Rodents.Montreal.QC.CA> said: > >> 7) Three way switch at the other enough of the hall. > > It's already on a three-way switch with the bottom of the stairs... > > do they make 4-way switches? > > Yes. You need two SPDTs (which you already have) plus as many DPDTs as > necessary to fill out the desired quota of switches (which means just > one of them, in your case). I've seen it done (at least for three > switches). House 4-way switches DO exist. They have 4 terminals (thus the [USA/NEMA] "4-way" designation). They preform the "normal"/"cris-cross" switching function. A quicky web search <"4-way" switches> got lots of answers, and you can buy these (new, sorry not 10 year old) devices. The first return from a yahoo search has a nifty animation on how this all works. The technology has been in use for quite some time (the house I grew up in used a 4-way switch in the 50's). The problem is that not many places stock the things (I looked on Home Depot's site to no avail). Basically the switch train is a bunch of exclusive-or's so that any switch can make the "sum" 1 (on), or 0 (off). I had to get a computer reference in there somewhere! If you do decide to do some wiring, be careful. There are lots of references on the web on the "how-to" aspects. Ob antique stuff: Yes, the house also (the part built in 1946) had knob & tube wiring. The other part (built in 1952) where the 4-way switch was had something resembling romex. -- Tom Watson tsw at johana.com ____________________________________________________________________________________ Want to start your own business? Learn how on Yahoo! Small Business. http://smallbusiness.yahoo.com/r-index

18 years, 1 month

Discussion of large systems (cctech Digest, Vol 39, Issue 11 9/11/2006)

by roger.holmes＠microspot.co.uk

Al Kossow <aek at bitsavers.org> wrote: On 8 Nov, 2006, at 19:38, cctech-request at classiccmp.org wrote: > > If you are interested, I could probably get you one of these when > they're > available > > http://bitsavers.org/tools/wizl/tapewizl/ > > Paul Pierce built something similar to what you did for recovering > 7-track > data, and discovered that you really need to recover the data using > analog > techniques to get any reliability. > > http://www.piercefuller.com/collect/proj.html > > Thanks for the offer. I will see how we get on using the original hardware first. The decks have ten tracks so I guess I would need two of them. Each frame contains 4 bits of data and six error correction bits so I am hopeful that the original hardware, after recalibration etc, will be able to read almost all of the data, and where we can't, at least know which frames have errors in them.

18 years, 1 month

It feels SOOOO good to run a modern OS on classic computers

by dzubint＠vcn.bc.ca

ahhhh, I just finished installing the newest (Nov 1 2006) v4.0 OpenBSD on my MicroVAX 3100 (17 years old) It really gives me a warm fuzzy feeling that they're still useable. Thomas Dzubin

18 years, 1 month

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test-drb November 2006