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Diffstat (limited to 'static/v10/man3/ddsput.3')
| -rw-r--r-- | static/v10/man3/ddsput.3 | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/static/v10/man3/ddsput.3 b/static/v10/man3/ddsput.3 new file mode 100644 index 00000000..b84a058b --- /dev/null +++ b/static/v10/man3/ddsput.3 @@ -0,0 +1,82 @@ +.pa 1 +.he 'DDSPUT, DDSINIT (III)'1/15/73'DDSPUT, DDSINIT (III)' +.ti 0 +NAME ddsput -- put a character on display data set +.sp +.ti 0 +SYNOPSIS (file descriptor in r0) +.br +jsr pc,ddsinit + +.br +(character in r0) +.br +jsr pc,ddsput +.sp +.ti 0 +DESCRIPTION These routines +provide an interface to the Display Data Set, a peculiar +device which can be called by Picturephone sets and which +will display some of the ASCII character set and certain +other graphics on the Picturephone screen. + +If the DC11 or other interface hardware is not already +set up to talk to the Display Data Set, the ddsinit_______ +entry should be called with the appropriate file descriptor in r0. +On the only known DDS attached to UNIX, the associated special file +is called "/dev/ttyc". +ddsinit_______ also clears the display. + +Thereafter, characters may be displayed +by calling ddsput______. +To the extent possible, ddsput______ simulates an ordinary terminal. +Characters falling to the right of the 22X22 screen +area are ignored; the 23rd line on the screen causes +the screen to be erased and that line to be put at the top +of the new display. +Certain ASCII characters are interpreted specially as follows: + +.in +5 +.ti -5 +FF clear screen, go to top left +.ti -5 +HT expand to right number of spaces +.ti -5 +DC1 treat as reverse line feed (move N) +.ti -5 +DC2 move cursor 1 place right (move E) +.ti -5 +DC3 forward line feed (move S) +.ti -5 +DC4 backspace 1 position (move W) +.ti -5 +SO enter graph mode +.ti -5 +SI leave graph mode +.ti -5 +CR put cursor at start of current line + +.in -5 +Graph mode allows display of the non-ASCII characters and +will be described when hell freezes over. + +Lower-case ASCII alphabetics are mapped into upper case. +Several ASCII non-alphabetic graphics +are unavailable as well. Also the lower right circle of +the "%" character is missing. +Also one of the circuit cards in the DDS has a crack in it and +sometimes it doesn't work. +All in all, +it is best to avoid this device. +.sp +.ti 0 +FILES kept in /lib/liba.a +.sp +.ti 0 +SEE ALSO AT&T writeup on DDS +.sp +.ti 0 +DIAGNOSTICS -- +.sp +.ti 0 +BUGS yes |