test-drb March 2002

test-drb@ccmp.vtda.org

292 participants
932 discussions

by cdl＠proxima.ucsd.edu

> Date: Sat, 09 Mar 2002 10:59:04 -0700 > From: Ben Franchuk <bfranchuk(a)jetnet.ab.ca> > X-Accept-Language: en > To: classiccmp(a)classiccmp.org > Subject: Re: Blank Paper Tape Question (P.S.) > Sender: owner-classiccmp(a)classiccmp.org > > Lawrence LeMay wrote: > > > > > > > > A low speed punch 10 cps vers a high speed punch > > > 50 cps could be a important cost factor. Now if you > > > had black paper tape one could zap out the holes > > > with a laser giving you a very high speed punch. > > > Since the punching speed does limit paper > > > tape to a practical limit of about 8kb was there > > > any really large paper tape programs? 4K focal on > > > a TTY was as long a program that I ever loaded from paper > > > tape ... 20 minutes. > > > > > > > Well, a good optical reader can read 400 characters per second. Correct me > > if i'm wrong, but that seems like 4096 bytes takes 10.24 seconds to read > > in. Assuming its not a 30 year old tape that vaporizes at that speed ;) > > > > -Lawrence LeMay > > The TTY is the LOW speed punch/reader ... 10 CPS. > The high speed reader is 300 CPS for the PDP-8. > The problem with paper tape > on the PDP-8 at least is that you had to read a character at a > time. Read char... process ... read. This meant the paper tape > had to stop the tape on every character. Reading the tape is > not the problem ... stopping was. You know, at 300 char/sec there is more than 3000 microseconds between characters. Plenty of time for even a PDP-8 to execute a thousand or so instructions. The next challenge is to write a program to duplicate paper tapes, high-speed reader at 300 c/s to high-speed punch at 50 c/s. Keep the punch running at full speed while reading in bursts to keep ahead of the punch. carl -- carl lowenstein marine physical lab u.c. san diego clowenstein(a)ucsd.edu

24 years

Blank Paper Tape Question (P.S.)

by cdl＠proxima.ucsd.edu

> Date: Sat, 09 Mar 2002 09:42:30 -0700 > From: Ben Franchuk <bfranchuk(a)jetnet.ab.ca> > To: classiccmp(a)classiccmp.org > Subject: Re: Blank Paper Tape Question (P.S.) > Sender: owner-classiccmp(a)classiccmp.org > > Loboyko Steve wrote: > > > > The DSI punches punch their own sprocket holes. Funny, > > I don't remember prepunched tape. Wouldn't that be > > punched tape prepunched with NULL's (ha ha). > > It is a know fact that Santa's Elves will pre-punch your > paper tape for you on their days off. You have a choice > of white,red,or green paper tape. > > A low speed punch 10 cps vers a high speed punch > 50 cps could be a important cost factor. Now if you > had black paper tape one could zap out the holes > with a laser giving you a very high speed punch. > Since the punching speed does limit paper > tape to a practical limit of about 8kb was there > any really large paper tape programs? 4K focal on > a TTY was as long a program that I ever loaded from paper > tape ... 20 minutes. Once (only) I loaded PDP11 DOS from paper tape onto an RK05 disk. My memory is that it was about a cubic foot of folded paper tape in trays. Fortunately I had a 300c/s tape reader, and a 9-track magtape drive to make a disk backup afterwards. carl -- carl lowenstein marine physical lab u.c. san diego clowenstein(a)ucsd.edu

24 years

New hard drive in an Indigo2

by mcguire＠neurotica.com

On March 12, Christopher Smith wrote: > Since this is arguably an on-topic machine, I think I can probably > get away with asking here. I believe the Indigo2 was introduced in mid to late 1994. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

24 years

Someone can make a picture of a KDA50 cab kit please?

by schadow＠aurora.regenstrief.org

Hi, would somebody here be so kind an give me a digital image of a KDA50 cab kit? A part number would also be nice, but the picture would be better. Doesn't need to be very good quality, just to roughly see how it looks. Thanks, -Gunther PS: even a detailled description would be helpful. Thanks!!

24 years

Microchannel and Redhat?

by SUPRDAVE＠aol.com

In a message dated 3/10/2002 10:53:06 PM Eastern Standard Time, fernande(a)internet1.net writes: << Will factory Redhat work with MicroChannel? I'm having trouble loading anything but Windows on this computer!! >> ive heard that slackware will. -- Antique Computer Virtual Museum www.nothingtodo.org

24 years

New DEC manual scan

by broth＠heathers.stdio.com

For all who may be interested, I am starting to add scanned DEC manuals to my web page www.webwirz.com. They will all be in PDF format. The first one was added today and is the maint manual for the LA30 DECwriter. "Woo Hoo" I'll add a few more this week and then I have to give up the Kodak scanner to a different department at work for a while. Thanks, Brian.

24 years

Barely classic

by jfoust＠threedee.com

At 11:43 PM 3/11/2002 -0500, Pat Finnegan wrote: >I think this one just squeaks by the 10-year rule... >Today I visited the high school I used to go to, and walked out with an >Amiga 2000 with a Video Toaster. In a pinch, Amiga-heads took a hacksaw to a DB25. It might be easier to find a true Amiga cable. You'll also want separate "program" and "preview" composite monitors if you want to play TV studio. If there's a "TIO" directory there, I wrote that stuff. That's the "Toaster I/O" set of translators to handle Mac PICT files and various 3D formats into Lightwave. - John

24 years

Altos 580

by dhquebbeman＠theestopinalgroup.com

> I've been looking for info on an Altos 580. It's pretty thin. The > little I've found shows the db25 connectors as rs232s, and mentions > terminals. Does that mean I can get a console on my trusty MicroTerm? > If not, are there any peripherals anywhere? Display, keyboard, an OS > maybe? If this is the squarish box, it ran MP/M-II... let me check, one we used to have where I worked ended up in the hands of a local fellow collector (hey Russ B., do you know Chris at Nomad Radio on Bardstown Road?). I saw Chris at a party two weekends ago, he's *real* hard to get hold of. But I'll see if I can, and see if Tom or Crutch gave him the manuals and software... Worst case, since MP/M-II is now freely downloadable, source and all, you'd just have to re-port it to the 580... -dq

24 years

Barely classic

by pat＠purdueriots.com

I think this one just squeaks by the 10-year rule... Today I visited the high school I used to go to, and walked out with an Amiga 2000 with a Video Toaster. (Yes, I legally walked out with it...) Anyhow, I've got the thing 'seemingly' working, but the manual for the Toaster says that it either needs an RGB monitor connected or a terminator on the RGB port. Does anyone here know of a source of cables for this thing (I'm a tad low on 23pin dsub connectors) or a pair of connectors so I can connect my A1084S up to it? For now I'm using the monochrome NTSC output from the computer, but I would like to have a color display (and a properly functioning Toaster). -- Pat

24 years

Altos 580

by doc＠mdrconsult.com

I've been looking for info on an Altos 580. It's pretty thin. The little I've found shows the db25 connectors as rs232s, and mentions terminals. Does that mean I can get a console on my trusty MicroTerm? If not, are there any peripherals anywhere? Display, keyboard, an OS maybe? Doc

24 years

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test-drb March 2002