test-drb October 2008

test-drb@ccmp.vtda.org

235 participants
330 discussions

by dm561＠torfree.net

Date: Tue, 30 Sep 2008 03:48:31 +0000 From: Ethan Dicks <ethan.dicks at usap.gov> Subject: Re: LED displays (TIL305, TIL308, etc.) <snip> >I have one or two of a few different types, but no loose 9368s (only >installed in boards already). >One thought I had for trying to use a reduced-pin-count MCU-based numeric >display was a 7447-type chip on 4-bits of an I/O port, and a 74145-type >BSD decoder on the other half of the port - up to 10 digits easily, or 9 >with simple blanking (write 0 to the '145 and don't hang a digit off of it). <snip> >-ethan ----------------------- That's the way it was usually done, although depending on display size (current) a '145 might not have enough oomph to drive the digits directly without a buffer. I have a few 9368s if you're desperate; it decodes to hexadecimal (for common cathode displays), whereas the 7446/7/8 displayed those odd symbols (and blank for F of course). m

16 years, 2 months

VT220 Keyboard Error 4?

by charlesmorris800＠centurytel.net

I turned on my VT220 for the first time in nearly a year. The screen says "VT220 Keyboard Error 4", all four green LED's (on the top right of the keyboard) stay lit, and nothing appears on the screen when I type. Disconnecting and reconnecting the coiled-cord between the keyboard and the terminal causes a cursor block to appear on the screen, but the keyboard is still locked and the LEDs stay on. Power-cycling the terminal shows the same error message. However, the boot prompts from the 11/23+ are displayed normally, so the receive part of the terminal at least is working. Where should I start looking, before replacing the keyboard? thanks for any hints -Charles

16 years, 2 months

HP 5036A microprocessor lab - searching for copy of "Practical Microprocessors"

by hpjimbondoris123＠dorisland.net

Hi: I have this manual and have scanned in 40 pages but its allready 125 megs and its 400 plus pages most emails will not allow this much of an attachment got any ideas? jim jimgeneva at yahoo.com

16 years, 2 months

Unusual media ideas (was RE: Vinyl Data- Classic Computers / Indie music tricks crossover)

by IanK＠vulcan.com

I also recall one of the magazines from the early days championing computer-readable strips printed in the magazine, similar to a UPC code but obviously much longer. Byte? Kilobaud? It's not coming up from long-term archive.... ________________________________________ From: cctalk-bounces at classiccmp.org [cctalk-bounces at classiccmp.org] On Behalf Of Chuck Guzis [cclist at sydex.com] Sent: Tuesday, September 30, 2008 4:39 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Vinyl Data- Classic Computers / Indie music tricks crossover --- On Tue, 9/30/08, Tony Duell <ard at p850ug1.demon.co.uk> wrote: > Not the same thing, but I beleive that Elektor magazine sold vinyl > records of programs for their computer projects (the TV games computer, > Junior computer, SC/MP system, etc). These were programs only, no > human-type music on the same disk. In keeping with the spirit of this list, who's going to be the first to encode CUTS data on a wax cylinder? Cheers, Chuck

16 years, 2 months

GIGI

by aek＠bitsavers.org

>> I have little experience with newer terminals, but the one I've wanted >> for a while is a GiGi (VK100?). > > I had seen one of these when it first came out. I think we got a poor > demo at the time from what I read of the specifications now. > > I picked up a couple of these from ebay recently. Someone was looking for someone to dump the roms from a GIGI a few months ago.

16 years, 2 months

Need Tecmar JrCaptain power supply specs

by scheefj＠netscape.net

Hello everyone, My JrCaptain and its power supply (the wall wart) have become separated. I'm pretty sure I still have it, it's just that I don't know which one it is. Naturally none have the Tecmar name. I'm sure someone here has one of these, so would you please look at the wall wart or power brick and tell me what it says? Thanks, Jim

16 years, 2 months

GIGI

by aek＠bitsavers.org

The thread was "DEC Gigi/VK100 ROM images?" on comp.sys.dec in mid April started by Andy Valencia.

16 years, 2 months

anyone utilizing early Macs to access the internet?

by mc＠media.mit.edu

> I've been told using the compact Macs are an exercise in futility. > But what about the Mac II's? (original II, IIx, IIfx, IIcx). > > I was just curious. Right. For a pre-Mac II (e.g. Mac Plus), even Appletalk network file sharing was an exercise in futility, let alone Ethernet. Until the Quadras came along, an Ethernet interface was not built-in. You had to buy a separate network card for you Mac II, and more likely than not, it used "thin ethernet" (coax) not 10-base-T. I did use some 10- base-T SCSI Ethernet adapters for non-expandable Mac laptops around 1975, but they were barely up-to-snuff. While I was in grad school, from 1997 through 1999, I used a Quadra 700 running IE for browsing the web. It seemed unbearably slow even then, and I think I switched to Netscape because its rendering engine was more efficient (IE often had to redraw the whole web page twice-- e.g. to figure out how big the images were, and on a 68040 that was a noticeable delay). Plus a lots of things have changed since then. I don't think I even needed a Flash plugins at the time. Not that you would even think of watching a YouTube video on a processor that slow. For email I used GNU emacs RMAIL running on my group's Unix server. I had to abandon it when MIME became the norm around 2000. Bottom line: For small values of "access the internet" the older Macs were serviceable. By modern standards, the old browsers are curiosities at best. But if you need to transfer some old files off your old Mac, the connectivity is there, and I have been grateful that FTP still works even today. --Tim

16 years, 2 months

Downsizing My Collection

by trebor72＠execpc.com

I just had a bout with Colon Cancer and will have to start downsizing my Computer collection which goes back to the early 80's got some S-100 stuff then PC's from the first thru XT, AT, 286, 386, 486's, 586, up to PII's I also have a complete IBM Series/! 110V half rack and full rack and spare External floppy. Plus 4978, some 3101's some TI 810 printers Cabling. Everything has to go. I also have a Pair of NEC APC's that run. Got two old IMS 8000 8080 cabinets. Have some S-100 cards and 8"drives. Got a Teletek Systemaster 65K CP/m SBC that used to work. even a boot floppy and Docs. THIS Has been sold Got a Mariposa Design 64K Static Memory Board plus Manual.; Even have a Tarbell SBC 8-16 that used to run Got all the Boots and Docs Boy Am I Puter POOR. Got a N* Horizon and a ton of Cards thats up for Grabs. Got a Cromemco ZPU and a 16K static card Plus an 8K ByteSaver fully populated sans Proms. Got a ADS Promblaster wating for one chip. Found one at Unicorn but need to sell something to get the Bread to purchase Got a Advanced Digital Corp S-100 MFM Controller but not sure of its Status. Got a Tarbell FDC 1011C and a 1011D Fully populated that ought to work Got two Vector Graphic CPUs and a Z80 Got some spare Compu-Pro cards 8085, Disk1 that needs fixing, Disk3, couple RAM22.s RAM17.s Interfacer 3 and 4 that I may put up if the price is right Looking for Shipping and Handling and a few Bucks to put my pocketbook to rest. I'd go the E-Bay Route but they only allow Credit cards for PayPal and I don't have one. I am strictly "Cash on the Barrel head" which includes Money Orders My E-Mail is good if anyone is interested. I am located just NW of Milwaukee in Menomonee Falls right off of US 41-45 for PICK-UPS I will be posting Vintage Computer Market Place and Comp.os.cpm and Maybe even E-BAY Bob in Wisconsin

16 years, 2 months

HP 5036A microprocessor lab - searching for copy of "Practical Microprocessors"

by hpjimbondoris123＠dorisland.net

Hello group: I have a person whom was kind enough to post the PDF excerps from scanning "Practical Microprocessors" which is the lab manual for the HP 5036 microprocessor trainer.. I scanned the schematics, rom listing and a few other pages. You can find it on Dave's site here http://www.neurotica.com/misc/practical_microprocessors.pdf be warned that in order to make it worth while to read its 125 megs I suggest that you print it out the 40 so pages. I printed it to make sure that its readable. Spent a day to scan it and build the pdf so I hope those with the trainer and have no manual will find it usefull. Jim

16 years, 2 months

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test-drb October 2008