test-drb February 2007

test-drb@ccmp.vtda.org

208 participants
390 discussions

by mtapley＠swri.edu

At 5:08 -0600 2/24/07, Chuck wrote: >I wonder how much damage micrometeorites will do after a few >millenia? A reasonable question. At least the NH CD, and I thought the Voyager one as well but could be wrong about that, are *under* the MLI (insulation, about 15 sheets of metallized mylar alternating with a very loose-weave mesh). Most dust-grain-sized stuff will vaporize on the outer layer, then get stopped by the inner layers. There is the possibility of something pea-sized, but there's not just a lot of particles/cubic km out in the Kuiper Belt and Oort cloud. -- - Mark, 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

17 years, 10 months

Restoring an XT - transfer problem

by dm561＠torfree.net

Laplink, Interlink and various clones all had this "remote install" feature. another mike --------------Original Message: From: "Mike van Bokhoven" <mike at ambientdesign.com> Subject: Re: Restoring an XT - transfer problem To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <00c201c757d4$df79e760$0132a8c0 at fluke> Content-Type: text/plain; charset="iso-8859-1" > Hoping someone may be able to help - I've rebuilt an old Commodore PC 5 (XT > compatible) back to working condition. Now the problem is getting anything > on to the machine. None of my current machines are capable of supporting a > 5.25" drive (of any flavour) so I can't easily transfer using that method. > However, I have installed DOs 4.01 to the C= & it includes GW Basic & I have > linked up that machine & tyhe XP box via a null modem cable. So, all I need > is a simple terminal program on the XT & I'm pretty much in business. > Problem is, all the GW Basic sources I've found for term progs are simply > for text-based terms only, there are none around with simple transfer > abilities (ie XModem or Kermit). Now this is going to sound very vague, but perhaps it'll jog someone else's memory. Once upon a time, it was possible to buy a serial file transfer package that supported transfer to/from MS-DOS machines with no removable media, e.g. machines with dead floppy drives, so long as they were able to load MS-DOS or similar in some way. The process went something like this: 1. Make sure the two machines have compatible RS232 settings. 2. Connect the two machines with a null-modem cable. 3. On the driveless machine ('client'), type a short command that effectively mapped the serial port to the console. 4. On the 'server' machine, run the transfer software, selecting the option that sends the software to the client machine. The server would then upload and start the client software - instant networking. The downside - I don't remember which package it was that did this. LapLink? XTLink? Google wasn't helpful in this case. Mike.

17 years, 10 months

Is this true?? (TI & watches)

by aliensrcooluk＠yahoo.co.uk

No idea whether this is true or not, as it was in part of a spam email, but because of the TI link, I thought it might be of some interest here (and perhaps someone can confirm whether it's true or not?): In 1960 an engineer working for a watch company in Switzerland discovered that a small crystal would vibrate at a constant rate. He found this was so accurate that it could be used to calibrate time so he took it to company management and said it would make an entirely new kind of watch that had no springs and no gears. They could not imagine who would want such a thing. Swiss watches dominated world commerce. They did not even bother to patent it. The inventor took his new idea to a commercial trade show, set up his booth and tried to interest manufacturers to produce his new kind of watch. Of the thousand people only 2 were willing to try it ? Texas Instruments and Seiko Corp. of Japan. Ten years later the Swiss manufacture of watches had shrunk to 10% of it former production. It took a complete change of thinking to produce this new model because most people are rooted in the old way and are reluctant to change. The new model, the new paradigm is refused. Regards, Andrew D. Burton aliensrcooluk at yahoo.co.uk

17 years, 10 months

Real Time Clock - was: Is this true?? (TI & watches)

by Billy.Pettit＠wdc.com

Roger Holmes wrote: I wonder which was the first computer with a real time clock, what year and how it was implemented. I imagine it was invented primarily for charging for computer time. I think the first machine I programmed, the IBM 7094 had one because if your job ran over its limit time (30 seconds IIRC), the job was aborted. Unless that was the operator looking at his wrist watch! Roger Holmes --------------------- The earliest I worked on was the CDC 1604, shipping in 1959. It used a 1ms increment and a 48 bit count. Like you mention, it was used for job control. But most of the early customers were military and used it for data logging from various experiments. That's a nice way of saying they made bombs and exploded them. Billy

17 years, 10 months

Restoring an XT - transfer problem

by dm561＠torfree.net

---------------Original Message: From: "Lance Lyon" <lance.w.lyon at gmail.com> Subject: Re: Restoring an XT - transfer problem To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <006301c757c0$ce77e610$0100000a at pentium> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Hiya Chuck, From: "Chuck Guzis" <cclist at sydex.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Sent: Saturday, February 24, 2007 1:10 PM Subject: Re: Restoring an XT - transfer problem > Why not simply hook up a 3.5" drive (DSHD is fine)? Get a DS2D > diskette by covering over the density aperture in a DSHD diskette and > format it up to 720K on your modern PeeCee using "format a: /n:9 > /t:80". Write whatever you want to it and let the Commo read it. > The PC5 will not recognise a 3.5" disk, even using driver.sys to set the parameters it always gives a "device not ready" error. > Alternatively, hook up a 360K 5.25" to your modern PeeCee and call it > a 1.44MB drive--format the blanks in your PC5 and your modern PC will > write them just fine. No go, 3 different machines, 5 different drives - all the same error - "Sector not found". cheers, Lance // http://www.commodore128.org Commodore 128 forums & more! // ---------------Reply: Grab a free copy of the old DOS LapLink 3 or 4 off the 'Web; that oughta do the trick. mike

17 years, 10 months

KDJ11-SD Boot ROMs

by doc＠mdrconsult.com

Does anyone have a checksum for the PDP-11/53 ROMs? I'm converting an M7554-SD. The ROMs from M7554-04, I think, are the ones I need. According to Jonathan Engdahl's page, they are 261E5.hex and 262E5.hex. I have a set of images already, and have one system running with them, but my EPROM-burner-guy is having trouble with 262E5.hex. I want to make sure I have a good image before I tell him to try harder. :) Thanks! Doc

17 years, 10 months

Restoring an XT - transfer problem

by ajp166＠bellatlantic.net

> >Subject: Re: Restoring an XT - transfer problem > From: Fred Cisin <cisin at xenosoft.com> > Date: Fri, 23 Feb 2007 19:34:52 -0800 (PST) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >> Or any other suggestion ? > >didn't 4.0x include something called "interlink"? > Not sure of 4.0 but 5.0 and 6.X included it. Allison

17 years, 10 months

cctalk Digest, Vol 42, Issue 67

by dm561＠torfree.net

---------------Original Message: From: "Joachim Thiemann" <joachim.thiemann at gmail.com> Subject: Re: Wanted: CBM-to-IEEE cable On 23/02/07, M H Stein <dm561 at torfree.net> wrote: > --------------------- > Not mine, and not cheap, but if you're desperate enough: > > www.jppbm.com > > mike Is that guy still around? I tried sending an email - I want to buy one of the 1581 kits - but didn't get a reply... Supposedly, he was at World of Commodore in december. Joe. -----------------Reply: Yes; as a matter of fact I was just talking with him at a meeting a week ago (and he does still have 1581 kits). mike

17 years, 10 months

KDJ11-SD Boot ROMs

by brad＠heeltoe.com

"Glen Slick" wrote: >On 2/23/07, Doc Shipley <doc at mdrconsult.com> wrote: >> Does anyone have a checksum for the PDP-11/53 ROMs? I'm converting >> an M7554-SD. The ROMs from M7554-04, I think, are the ones I need. >> According to Jonathan Engdahl's page, they are 261E5.hex and 262E5.hex. >> > >You can try the straight .BIN files instead of .HEX files. > >http://www.dunnington.u-net.com/public/DECROMs/23-261E5.bin >http://www.dunnington.u-net.com/public/DECROMs/23-262E5.bin I used those images and they worked fine. My work directory looks like this: -rw-rw-r-- 1 brad brad 16384 Jul 14 2005 23-261E5.bin -rw-rw-r-- 1 brad brad 32768 Jul 21 2005 23-261E5-doubled.bin -rw-rw-r-- 1 brad brad 16384 Jul 14 2005 23-262E5.bin -rw-rw-r-- 1 brad brad 32768 Jul 21 2005 23-262E5-doubled.bin I'm not sure what the "doubled" files are however. Maybe I used a 27256 instead of a 27128. I think that's the case. linux cksum says: 3162496093 16384 23-261E5.bin 1853346231 16384 23-262E5.bin 3422894537 32768 23-261E5-doubled.bin 961258351 32768 23-262E5-doubled.bin -brad

17 years, 10 months

FW: Re: old rare diskdrives?

by aek＠bitsavers.org

> I have see some disk drives on your homepage and want to ask you if > sale the magnetic and coils from the old diskdrives? no --al (who is trying to find a working CDC 9766 right now)

17 years, 10 months

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test-drb February 2007