----- Original Message ----- From: "Olin Lathrop" To: "Microcontroller discussion list - Public." Sent: Saturday, September 17, 2005 9:18 AM Subject: Re: [PIC] 16F684 & Interrupt Problems > michael brown wrote: > > IIRC, you could punch up a control card that defined tab stops > > wherever you wanted, auto skip zones and even numeric only areas. As > > I remember it many of the machines would often stop one space to the > > right of the defined tab because they never got properly adjusted. > > That service was reserved for actual keypunch professionals. ;-) > > I think you are remembering keypunch machines, not teletypes. These did > indeed have a drum you could put a special card on that defined tab stops > and other stuff. Teletypes like the ASR-33 and ASR-35 weren't that smart. Yes you are quite right, I don't know what I was thinking. I must have had a preliminary senior moment. ;-) > One annoyance of the model 041(?) keypunch machine is that although it had a > duplicate card function, it wasn't actually capable of duplicating an > arbitrary binary card. Certain bit combinations that couldn't result from > keystrokes caused the machine to jam. You could only create those cards in > the manual "multi-punch" mode where you specified exactly which bits to > punch out. That was also the way to clear a jam. Put it in multi-punch > mode and bang on the keyboard like a monkey until all the punches got > released and it could continue feeding the card thru. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist