test-drb December 2000

test-drb@ccmp.vtda.org

192 participants
490 discussions

by cmcmanis＠mcmanis.com

I hate it when I do this. So I started playing around with the 11/34 and discover that 2 bits aren't being set on the words I try to load into memory. I guess it is perhaps bad memory, I don't have a way to test it other than to load in a program from the front panel, so I pull the memory and replace it with 64KW that are known to be good. Now it shows the top 4 bits as being stuck on. I pull the memory, blow out the connectors, look for loose dirt etc that I've missed, reseat the memory but no joy. Everything else seems to be working so the next suspect is the KY-11B, if it had lost a buffer it could exhibit this behaviour. I pull the KY-11B and check it out, it looks ok so I clean out the connectors where it is seated and re-install. No joy, 4 bits stuck. Now I'm really irritated, so I take the KY11B from my working 11/34 and replace it, great all the bits work. Ok so I've got a KY11B to fix. Not too much of a problem since it is pretty simple. I put back the original memory and now I get BUS ERR whenever I try to touch memory. Ok, figure the memory board was bad and put the good board back in so that I can work on the RL11 but wait, now it also gives me a BUS ERR indication. I check to make sure I haven't dislodged any of the stubby grant cards, they are fine, pull the terminator and move it up to the end of the first back plane. Still I get the BUS ERR indication. ARGH! --Chuck

25 years, 1 month

VT180/Robin system help needed

by hofmanwb＠worldonline.nl

The RX02 has afair 77 tracks, 26 sectors at 256 bytes giving 512512 bytes. In RSX11M sources at some places an RX03 is mentioned at double RX02 capacity. This was never sold by DEC. But an 1 Mb 8" floppy is very much possible. Wim ---------- > From: ajp166 <ajp166(a)bellatlantic.net> > To: classiccmp(a)classiccmp.org > Subject: Re: VT180/Robin system help needed > Date: Monday, December 18, 2000 8:06 PM > > From: Claude <claudew(a)sprint.ca> > >The owner told me the Robin board was modified to use 1M drives (?). > >There are a couple ou wire jumpers on the Robin board. Also got some > >disks, Robin schematics, a few CP/M manuals... > > > 1m???? maybe two sided 8". the best you can do with it is 800k using > 80tr/2sided DD. > > >2 BNC connectors on the Robin board. Whats coming outta there? video? on > >both? composite? > > > Those are on the VT100 board. Video in and video out, VT100 can sync to > external video. Makes a fair char gen. > > >What drives should I be using to boot the Robin? The RX50-AAs or the > >Shugarts 400L? > > > SA400s but if he modded the boot roms then anything goes. > > >I see 2 DB25 ports on the Robin board and a larger (DBxx) on the VT100 > >board, anything special? > > > larger DB (37 pins) is on the VT180 card and is the FDC connector. > The VT180 is the 54-15152 board { z80, 64k dram, 4 8251s, 1793}. > > >DIP switches on VT100...whats the deal there? > > > config for AVO, serial port (DTR/DTC if memory serves). > > >Anything else I should look out for? > > > >Anybody know where VT180 info is available...I would like to see the > >guts of one... > > > the Vt180 design is near textbook z80 without zilog peripherals. > > I have a fair amount but,not scanned. I've hacked the board hard. I > bought > a box of Vt180 cards (about 20 of them) and mods I've worked include: > > Standalone (no VT100 required) > 2 sided > Z80 @6mhz > Modded bios for 782k on 3.5" floppy > IDE interface hacks > CP/M in ROM > Extended ROMs and paged ram > > I've used it as a stand alone printerbuffer. > > Allison >

25 years, 1 month

HP plotters

by g.wheeler＠worldnet.att.net

re: From: Philip.Belben(a)powertech.co.uk Date: 09/03/99-07:23:55 AM Z >I like the idea of a router in the pen part of a plotter - but it's a lot of >mass for the pen carriage to move around! > >Philip. Am working on a router table based on the HP 7225A single pen 8 1/2"x11" flatbed plotter. To make architectural models out of foam etc. Built an aluminum gantry-crane type arrangement that supports a Dremel tool. Tried to keep mass and friction low as possible. Connected it to the plotter with a pantograph arrangement. The plotter will drive the dremel tool well at slow speed. HOWEVER, when the plotter gets the message "PU" pen up, it RACES to the next x,y coordinate. This quick movement throws calibration and accuracy off. The other problem is printing from a Windows CAD program to an old plotter like this. Gary Gary M. Wheeler, AIA home page: http://g.wheeler.home.att.net

25 years, 1 month

The debate on what per say is a mini...

by dhquebbeman＠theestopinalgroup.com

> >I just spec'd a new fileserver for our office: > > > > Dell PowerEdge 2400 > > Dual hot-swap power supplies > > 6-bay hot-swappable drives > > RAID 1 & 5 > > 512MB ECC SDRAM > > Those run about $500 these days right? > > OT, but has anybody else been surprized at how fast the current generation > of processors are falling in price? 1.4 Ghz P4 has gone in the last couple > weeks from about $1400 to under $700. The price of that CPU *should* fall fast- a 1.2GHz P-II is faster... -dq

25 years, 1 month

College kids research Infocom

by jfoust＠threedee.com

http://slashdot.org/articles/00/12/19/1313235.shtml but unfortunately their summary paper is a 9 meg PDF. - John

25 years, 1 month

OT. THE TWELVE RECOUNTS OF CHRISTMAS was Sign Me Up for a Vote-A-Matic

by rigdonj＠intellistar.net

>Subject: THE TWELVE RECOUNTS OF CHRISTMAS > >THE TWELVE RECOUNTS OF CHRISTMAS > >On the first recount of Christmas my country gave to me > ...a disputed presidency. > >On the second recount of Christmas my country gave to me > ...two campaign spins, and a disputed presidency. > >On the third recount of Christmas my country gave to me > ...three pregnant chads, two campaign spins, and a disputed presidency. > >On the fourth recount of Christmas my country gave to me > ...four contested ballots, three pregnant chads, two campaign spins, > and a disputed presidency. > >On the fifth recount of Christmas my country gave to me > ...five court filings! Four contested ballots, three pregnant chads, > two campaign spins, and a disputed presidency. > >On the sixth recount of Christmas my country gave to me > ...six disenfranchised voters, five... court filings! > Four contested ballots, three pregnant chads, two campaign spins, > and a disputed presidency. > >On the seventh recount of Christmas my country gave to me > ...seven politicians babbling, six disenfranchised voters, > five court filings! Four contested ballots, three pregnant chads, > two campaign spins, and a disputed presidency. > >On the eighth recount of Christmas my country gave to me > ...eight spokesmen whining, seven politicians babbling, six >disenfranchised voters, five court filings! Four contested ballots, > three pregnant chads, two campaign spins, and a disputed presidency. > >On the ninth recount of Christmas my country gave to me > ...nine reporters guessing, eight spokesmen whining, > seven politicians babbling, six disenfranchised voters, > five court filings! Four contested ballots, three pregnant chads, > two campaign spins, and a disputed presidency. > >On the tenth recount of Christmas my country gave to me > ...ten legal rulings,nine reporters guessing, eight spokesmen whining, >seven politicians babbling, six disenfranchised voters, five court >filings! Four contested ballots, three pregnant chads, two campaign >spins, and a disputed presidency. > >On the eleventh recount of Christmas my country gave to me > ...eleven judges judging, ten legal rulings, nine reporters guessing, >eight spokesmen whining, seven politicians babbling, > six disenfranchised voters, five court filings! Four contested ballots, >three pregnant chads, two campaign spins, and a disputed presidency. > >On the twelfth recount of Christmas my country gave to me > ...twelve lawyers lying, eleven judges judging, ten legal rulings, > nine reporters guessing, eight spokesmen whining, seven politicians >babbling, six disenfranchised voters, five court filings! > Four contested ballots, three pregnant chads, two campaign spins, and...a >disputed presidency. >

25 years, 1 month

Sign Me Up for a Vote-A-Matic

by rigdonj＠intellistar.net

At 03:40 PM 12/18/00 -0500, you wrote: >> > that ran the original DIA baggage system... >> >> Could it be that you have a machine even more >> despised than the Florida Vote-O-Matic booths >> with the special decis-E-rase buffer pads... >> ...Uuuh forget it. >> >> John A. >> Would like to get my hands on >> one of those and a steam roller. > >No, noooo! Have you forgot the cardinal rule of >computing- gigo (garbage in, garbage out)? > >These may be the last of the DataProducts card >readers! Don't put the blame on them, when it >was those garbage pre-punched cards that were >to blame! > >For any of you who are in Florida, when, early next >year (I'd guess), they outlaw the Vote-A-Matic, I'd >like to get one of these dear old friends. Hmmm, I haven't thought of it but I guess they'll be an instant collectible. I'll have to start watching for them at the auctions. Joe

25 years, 1 month

Fault-tolerant computers (supposedly)

by xds_sigma7＠hotmail.com

Hmm, the recent discussion about the "shoot the other node in the head" or whatever reminds me of the so-called "fault-tolerant" 486 machines I have that ran the original DIA baggage system... Hehehehe... They make very lovely end tables! Will J _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com

25 years, 1 month

RL01/RL02

by djg＠drs-esg.com

>From: "John Allain" <John.Allain(a)donnelley.infousa.com> >Subject: RE: RL01/RL02 >> The RL01/02 pocket service guide is still avalable >> from Compaq, $42, http://www.digital.com/dassearch.html, >> enter rl01 > >r101 entry Did Not work. > Is it RL01, not R101. (either case works) >From: Paul Williams <flo(a)rdel.co.uk> >Subject: Re: RL01/RL02 > >This was also a friend's experience when attempting to order the VT100 >User Guide. I wish they'd remove these items from their price list, >because it would make me feel happier about scanning them. > Thats annoying, I know that before Compaq when I ordered stuff they didn't have it did leave the price list some time later. I was also assuming that when people can't buy them they would go away so I can put them online. David Gesswein http://www.pdp8.net/ -- Old computers with blinkenlights

25 years, 1 month

New Find: Sanyo Navigator - has crt problems

by ethan_dicks＠yahoo.com

It was "blue tag" day at the thrift store - 50% off. I found this black box with a 9" crt, telephone and floppy drive. There was a bit of thermal fax paper hanging out the back and the top lifted off to reveal a paper input hopper. The whole thing seems to be a piece of office equipment, c. 1990, consisting of an integrated phone, fax and 8086-based PC. Locating and removing the kilogram of metric screws reveals a 40-pin drive interface (with a Fuji FK311X-50R drive attached), a 720K Sony floppy, a bunch of 64K DRAM zips, an externally accessible 27C1024 EPROM and the general sorts of things one finds in an 80x6-based box. Does anyone have any information on this guy? Web searching for keywords like Sanyo and Navigator comes up with *lots* of hits, but none useful. One problem with this unit - the crt has a collapsed display - all the video signal is shown one pixel tall. I know it's likely to be a very simple fix, but I'm not an awesome TV repair dude. The interface between the CRT and the CPU is a single, proprietary cable. Other than the lack of video, the box seems to boot. The hard disk makes proper sorts of noises and the caps lock, scroll lock and num lock keys all make the lights go on and off. Thanks for any hints, -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Yahoo! Shopping - Thousands of Stores. Millions of Products. http://shopping.yahoo.com/

25 years, 1 month

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test-drb December 2000