joa...@swbell.net (John McKown) writes: > Depends on the printer. 0x0A on many DecWriters did both a CR and an LF > function. That's why UNIX defaulted that way, from what I was told. No > need to do any character translation or additions if you just did a "cp" > to the device. Of course, Windows via MS-DOS via CP/M-80 used CRLF for > the same reason. The PC printers of the day required a separate LF and > CR to go to the beginning of the next line. And the CR was done first so > that the mechanical time to return the head was taken up by rolling the > platten to the next line due to the fact that the CR functino took a > "significant" amount of time compared to the LF or printing a simple > character. Again, as I was told.
re: http://www.garlic.com/~lynn/2011n.html#45 CRLF in Unix being translated on Mainframe to x'25' another recent post about adding tty/ascii terminal support to cp67 (already had 2741 & 1052 support) http://www.garlic.com/~lynn/2011n.html#70 1979 SHARE LSRAD Report one of the things done in terminal support was line was "padded" with idle characters after a "CR" ... formula that calculated how many characters had been printed in the line, how fast the carriage/typehead returned and how fast characters were transmitted ... in order to allow carriage/typehead to have returned before start printing the next line. for other trivia ... this is old item about the name cp/m being derived from (ibm mainframe virtual machine) cp/67 ... kildall (author of cp/m) having used cp/67 at navy post graduate school in 1972 ... gone 404, but lives on at wayback machine http://web.archive.org/web/20071011100440/http://www.khet.net/gmc/docs/museum/en_cpmName.html -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
