On 20150405_0201-0600, Bob Proulx wrote: > Stephen Powell wrote: > > I am experiencing a very strange phenomenon. I have an old IBM 3151 > > ASCII display terminal that has been lying around the house; > > and today I decided to see if I could get it connected up to one > > Fun! I never used one of those models and am unfamiliar with it in Yes!
> particular. > -- snip -- > > Then at least you would know it is the CR that isn't handled like in a > standard terminal. ^^^^^^^^ Times change. If one waits even a short while, they can change a lot. When this terminal was new, a 'standard' terminal was a mechanical teletype manufactured by Teletype Corp. in Skokie, IL. The generic name for this 'terminal' was, I think, a 'glass teletype' Each computer company had its own special glass teletypes that interfaced to its computer. All proprietary. None of the glass teletypes had the very useful scroll back feature of the real teletype that they were trying to emulate. Teletype paper came in rolls. A single roll was a many meters long. It would pile up behind the teletype as one worked. It could always be pulled out and reviewed back to initial login at the beginning of the session. Some people left the paper behind for someone else to clear away. Others saved it, rolled up and labeled at their desks. It took 0.1 sec. to mechanically process one character, except for carriage return. That took up to 0.2 sec. The placement of the carriage return character before the non-printing line feed character allowed the carriage to get all the back to the left before a printing character arrived. It was in the design of teletype that this cr/lf feature was baked into our history. Cheers, -- Paul E Condon pecon...@mesanetworks.net -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20150405155949.gb8...@big.lan.gnu
