[email protected] (glen herrmannsfeldt) writes: > OK, I forgot that the Usenet gateway doesn't work anymore. > > I am wondering what software one needs for a 3705 to connect > up ordinary ASCII terminals. > > For example, what would be needed to use TSO or Wylbur on > ASCII terminals? I know this is what was done 35 years > ago, but I don't know now who knows how to do it. > > I do remember that for dial-up lines it would allow for 300 > baud or 110 baud, or even for 2741s, depending on the first > character you typed. Hardwired lines were fixed speed, and > could be higher than 300. (I believe O for 300 baud, and > S for 110 baud.) > > Faster lines might only be at a fixed baud rate.
cp67 delivered to the univ. had automatic terminal type identification for 1052 and a couple of 2741 types. 2702/2703 was possible to dynamically change the line-scanner type using the "SAD" CCW (use one line-scanner type, try a couple operations and if they get errors, switch to a different line-scanner type). the univ. had a number of TTY/ASCII so I had to add TTY support to CP67 ... and tried to do it also using dynamic terminal type identification. I also tried to support single dial-in number for all terminal types ... aka "hunt group" ... common pool of lines. However, IBM had taken short cut and hard-wired the line-speed oscillator to each line ... so while it was possible to change the line-scanner ... it wasn't possible to change the line-speed (original 1052 & 2741 had same line speed, but TTY was different). This was motivation for univ. to start a clone-controller project, building channel interface board for Interdata/3 programed to emulate 2702 ... but able to also do dynamic line-speed operation. This was later improved to Interdata/4 for the channel interface and cluster of Interdata/3s dedicated to line-scanner. Four of us get written up as responsible for (some part of) the clone-controller business. Later Perkin-Elmer buys Interdata and the clone-controller continues to be sold under the PE logo (in the late 90s, I ran into PE box in large datacenter handling much of the dial-up point-of-sale terminals on the east coast, 1200 baud ascii). A number of univ. had been sold (virtual memory) 360/67s supposedly for use with TSS/360 ... however TSS/360 had hard time reaching maturity ... so a lot of places ran CP/67. Other places developed their own virtual memory operating systems for 360/67 ... Stanford did Orvyl/Wylbur (Wylbur later ported to MVS) and Michigan did MTS. MTS did clone-controller using PDP8 http://www.eecis.udel.edu/~mills/gallery/gallery7.html some more MTS http://www.eecis.udel.edu/~mills/gallery/gallery8.html -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
