test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jwest＠classiccmp.org

Sorry, that last post ('Re: bye for now') was not intended to get through. The list was put into emergency moderation mode the past couple days so I have had to approve each post and apparently slipped on that one. Hopefully, people noticed the quick return to on-topicness the past day or two. Several last thoughts on the topic... Being the list owner, last I checked - I'm allowed to state my preference on things. I have a strong preference against top posting. I have never banned anyone for it. I see no problem with me stating that preference once in a (great) while, especially when new members first join the list. I also find it rather odd that people post ad-nauseum about how much they hate the off-topicness (or the specific off-topic post in question), when in fact the quickest/easiest way for a list member to end an off-topic thread (other than contacting me) is to simply not respond to the post. Venting your angst is a sure way to continue the flame-fest. In any case, I'll continue to moderate 100% of the inbound posts, until such time as I see things staying level-headed for a while. J

10 years, 2 months

IDE knowledge anyone?

by marc.verdiell＠gmail.com

Danke sehr, Oliver! Is your implementation available online? Marc >>Marc Verdiell wrote: >> Do you mind providing links to any good implementations of IDE on >> ATMega you know of? >> Marc >Of course mine ;) >And http://www.opend.co.za/hardware/avride/avride.htm but I never verified

10 years, 2 months

Bye for now... was: <insert a huge lot of bloat and offtopic here>

by simski＠dds.nl

Hi all. Another great day started with me deciding that thorwing away 70% of a list every day is not worthwhile any more. This list is acting like Whatsapp and Facebook more and more. It seems that a lot of people are unable to keep on topic. Its a shame. It would be so handy if people could refrain from "biting the troll". I am truly not interested in top, bottom posting, and other non classic computer blabla. Bye -- Met vriendelijke Groet, Simon Claessen drukknop.nl

10 years, 2 months

Commodore 64?

by tulsamike3434＠gmail.com

If I would have known!!! WOW I would have just read more posts before I posted my first post look at this mess... There is no reason for people to be rude or disrespectful to new people like myself. I have never joined a place like this I know now that it has been said 1000000000000 times to scroll down and put my text there all I wanted to do was talk about my new Commodore 64's. Can we do that? I make a post about creepy pastas and all I got was made fun of? Do yall not want new people to join? I think I can learn a lot from here that's all I want to do! There are many Computer geniuses on here that I can learn a lot from that's what I'm interested in and I like Creepypasta's and I collect Honda ATC 3wheelers. But can we get back on track with the Commodore 64? Sent from my iPhone

10 years, 2 months

Identifying Data General (or DG-related) console/terminal/whatsit?

by derschjo＠gmail.com

Hi all -- A friend of mine is investigating picking up some DG hardware, and this item: http://yahozna.dyndns.org/scratch/dg/dg%20console.jpg Is included along with the rest of it. I *know* I've seen something like this somewhere but I can't find anything now that I need it :). Can anyone identify this? Thanks, - Josh

10 years, 2 months

Accessible Computing (Was "Re: Display-less computing")

by COURYHOUSE＠aol.com

we have a portable braille terminal in the museum's accessibility collection . we also have a vast ( and always looking for more) of the Deaf and Hard of Hearing teletype machines and couplers. Ed@ _www.smecc.org_ (http://www.smecc.org)

10 years, 2 months

Display-less computing

by COURYHOUSE＠aol.com

Does an example of the IBM/ TV/SET terminal exist out there? Manual? Ed# _www.smecc.org_ (http://www.smecc.org)

10 years, 2 months

IBM 2260 acoustic delay line

by echristopherson＠gmail.com

On Sat, Dec 12, 2015, Jon Elson wrote (in the big top posting thread): > On 12/12/2015 07:22 AM, Mike wrote: > >The one question I do have for the older gentlemen on here is what in the > >world did the computers without a screen to look at do? Now I know about > >the tape, cassette tape's and even the paper with the hole punches in them > >but what kind of applications were they use for? Mathematics or? ? ? [snip] > Later they got some > IBM 2260's, which were Zenith 9" TV sets and a keyboard connected to an > interface box in the machine room. Very primitive, but very interactive, > great for quick program editing and submission. I'm reading about those terminals and find it just fascinating how they used acoustic delay line memory to remember the pixels. But I have lots of questions: 1. Did the cables connecting the 2260s to the display controller actually contain the delay lines themselves, over the whole length; or were the delay lines just inside the controller and then some electronic signal was sent out to the terminals? 2. I would think that the wave travelling along the delay line would weaken over time. How was it refreshed? 3. What kind of speed could be acheived, and did this depend on the number of connected terminals? -- Eric Christopherson

10 years, 2 months

Non-standard parallel port on Selectric I/O?

by tmfdmike＠gmail.com

I have what was once an IBM 2970 Reservation Terminal. Some time in the late 1970s. an outfit called 'Western I/O' got hold of a bunch of these, including mine, ripped out all the IBM electronic guts (but left their electromechanical bits - solenoids and contacts) and installed their own boards, and sold them to the home-brew computer folks of that day - presumably hung off contemporary Altair and Imsai machines etc. They made two versions. One was a fancy full-blown terminal with a 6800 microprocessor, adjustable baud rates, standard RS232 port etc. I'd really like to get hold of one of these if anyone has one gathering dust btw... The other one was a very dumb print-only versions. According to contemporary ads, it has: "? Printer-only model availability w/parallel ASCII interface." "The Printer Terminal IBM Selectrics are known for their well-defined, high-quality printed characters and easy-to- change elements. An ideal choice for text processing, highly-legible source listings and personal or business correspondence. And it's easy to connect to home or business computer. Just plug in 115 Vac, hook up the ASCII printer port and let 'ergo." That is ALL the documentation I have on this thing! The 'parallel ASCII interface' is implemented as a DB25 female on the rear of the Selectric. It *looks* exactly like a parallel port on a PC. So I hoped it would use standard parallel port pinouts and a straight-through ribbon cable would do it. No such luck. I don't have a parallel port analyzer, but I have lots of serial port analyzers, including ones with an LED per line, all 25 lines. So that is an improvised window into what's happening. For starters. when I operate the 'paper out' switch, I can see a line going high/low corresponding to switch position - but it's pin 19 on the DB25 connector, which should be ground on a standard parallel port! 'Paper out' should be on pin 12. So it's clearly not standard... Now I can start tracing pins on the interface back to lines on the PCBs, and try to figure what they do. At least I can relatively quickly eliminate those that aren't used, or are ground plane. But, question: back in the day, was there *another* 'standard' for parallel port pinouts? Used on S100 bus PIO etc. cards, the kind of thing this product was intended to be used with? I've found Googling on such data to be remarkably unproductive... any help out there? Mike

10 years, 2 months

Display-less computing

by wdonzelli＠gmail.com

> Sometime later, maybe around 1971 they got some IBM 2741 terminals which > were Selectric typewriters connected to an interface. Later they got some > IBM 2260's, which were Zenith 9" TV sets and a keyboard connected to an > interface box in the machine room. Very primitive, but very interactive, > great for quick program editing and submission. Were 2260s really Zenith products inside? I certainly could believe it, judging from the tube lineup. Someday I would like to see one up close and personal. The 1800 actually did have a video option, and yes, you had to provide your own cheap black and white TV. -- Will

10 years, 2 months

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