test-drb February 2007

test-drb@ccmp.vtda.org

208 participants
390 discussions

by alhartman＠yahoo.com

Gordon wrote: > Al Hartman wrote: > >> We only have a limited amount of chips. Once these are gone, I can't get any more. > > You could look inside old BT payphones. > > Gordon. Except, this is NEW, OLD STOCK. NOT pulls... HUGE difference. Al

17 years, 10 months

the history of the personal computer in TV commercials

by legalize＠xmission.com

<http://www.downloadsquad.com/2007/01/30/the-history-of-the-personal-compute…> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 10 months

Arty computers

by us21090＠yahoo.com

I like the looks of the Olivetti Underwood Programma 101. It even had two blinky lights: green (solid=ready, blinking=busy) and red (error) http://www.silab.it/frox/p101/boxbig.gif If I recall correctly it was the first computer(*) I programmed. Back in '72-73, while in Jr. High (btw, not "Middle School"). Several interesting things about the P101: Introduced in 1965 (same year as PDP-8). No ICs; all discrete components. The boards were placed component side to component side, designed with one board's components fitting in the spaces between the components of the other board. Programs were stored on magnetic cards, which Olivetti received patents for (HP had to pay about $900K in royalties for the technology use in the HP9100) Its approximate 240 bytes of memory used acoustic delay line technology. Scott Austin (*) Computer? Programmable Calculator? I'll let someone else debate about this. ____________________________________________________________________________________ Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/

17 years, 10 months

Tandy 2000 and stuph 4 sale in Colorado

by chrism3667＠yahoo.com

"Model 2000 keyboard Intro to Model 2000 manual (874-9486) Tandy 2000 Tech Reference Manual (26-5404) Tandy TRS-80 Digi Mouse/Clock Controller Board (26-5144) Tandy Monitor MonoChrome (26-5111) Model VM-1, Date Manuf. 3/1984, SN: RS022001 Tandy Intelligent Modem, DCM-7 (26-1394) Tandy TRS-80 Personal Computer, Model 2000 (26-5103) MS DOS Basic floppy disk (1), for the Model 2000 (26-5103) This is the Tandy disk, not a copy. The items listed above are all in their original boxes." I've been asked to take offers and submit them to the seller. Therefore e-mail me directly. Colorado Springs, Colorado. ____________________________________________________________________________________ Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/

17 years, 10 months

Canadian Peecee on eBay - very artsy ;)

by chrism3667＠yahoo.com

http://cgi.ebay.com/8088-Best-Performer-88-10-1980s-PC-with-Keyboard_W0QQit… Z330083298764QQihZ014QQcategoryZ4193QQrdZ1QQcmdZViewItem ____________________________________________________________________________________ Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/

17 years, 10 months

Arty computers

by dm561＠torfree.net

------------Original Message: Date: Thu, 1 Feb 2007 22:11:24 -0500 From: "Ethan Dicks" <ethan.dicks at gmail.com> <snip> Long ago, I did hang a pair of Radio Shack 7-segment LEDs off of a PET User Port with some trivial logic to use the 8th bit to select digit A vs digit B, then the lower 7 bits of the port went right to the segments. A small machine-language routine tapped into the 60Hz clock interrupt refreshed the digits. For a modern machine, I'd recommend some sort of external latch and multiplexer at least, or perhaps a dedicated LED driver like the ICL7218 (MAX7218?) (here's one I made a while back with 16 digits from one parallel port and two driver chips) http://www.penguincentral.com/retrocomputing/retrogaming/scoreboard.html -ethan ------------Comment: For driving 7seg displays or LEDs, I'd recommend an MC14489; it'll directly drive 5 mux'ed 7 segment displays (hex or pseudo-alpha), straight binary, or 25 LEDs from a 3 wire DC to 3MHz serial interface. Saves a lot of wiring, especially if you use multi-digit displays; just the thing for a blinkenlights panel... mike

17 years, 10 months

PDP-11/70 in Yates Center, KS

by wdonzelli＠gmail.com

OK, go to Ebay and look at item #29007747962. A nice machine, centainly. I can not help but think this machine was once Jim Willing's - or he has started selling things off. Does anyone know anything about the seller guardianrob453? If he is in touch with Jim Willing, I centainly need to talk to him. -- Will

17 years, 10 months

Visual 50 keyboard

by RLAAG＠PACBELL.NET

Found an old keyboard for a visual 50 terminal... If anyone can use this it is just for shipping charges...

17 years, 10 months

Problem with AS/400 terminal

by fireflyst＠earthlink.net

Hi Everyone! I was wondering if any of the CRT gurus here could help me out with a problem I'm having with my Twinax AS400 term. When I turn it on, it's fine. However, it's got a power saving feature that turns off the screen if it goes idle for too long. If this is activated and I try to wake it up by pressing a key on the keyboard, the screen goes crazy like it's got a bad refresh rate or something. The only way to fix it is to power it off and back on, which works every time - the problem with that is, I lose my twinax session, which can deadlock the machine depending on what mode I'm running it in. Any ideas? Julian

17 years, 10 months

Looking for OS/278 to boot up a DECmate I

by djg＠pdp8.net

>the "easiest" way to get OS/278 to a DECmate I >is by copying a boot floppy and putting it in the mail. Can anyone on >the list assist me with this? > I can make them and send them. I have most of the bits for a DECmate I but not enough to be functional. I did make these images for people but never heard back if they worked ok. http://www.pdp8.net/images/images/os8/DECmate_I.shtml They are also RX02 format which is what their machines seemed to be set up for. Is yours set for RX02? I can put these on floppies or if you know of a known good RX01/RX02 image for a DECmate I can use it. >One of my goals, BTW, is to snarfle off images of my PDP-8 >RX01 and RX02 disks for preservation and sharing. I have a few boxes >of disks from the 1978-1985 timeframe, up to the time I stopped using >a PDP-8 on a daily/weekly basis. > If your doing that the disks will be free. If you don't have a program to dump I have one at ftp://ftp.pdp8.net/software/dumprest/ which can dump RX01 and RX02 over the serial port. The code will need to be modified to use the serial port on the DECmate. Kermit source should show that. Mine makes image useable by SIMH which is the same format they are on my website. David Gesswein http://www.pdp8.net/ -- Run an old computer with blinkenlights Have any PDP-8 stuff you're willing to part with?

17 years, 10 months

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test-drb February 2007