laser printers and 8 bit serial

[Chris Torek]

This has all been gone over several times, but here it is again in
condensed format.  (Reference cards anyone?)

SUMMARY OF 4.2BSD TTY DRIVER FLAGS
----------------------------------

TANDEM		4.2 will send ^S to terminal when 4.2's buffers get full
		(use only in CBREAK or RAW, or you'll never get ^Q!)
CBREAK		4.2 will pass characters back to programs one at a time
LCASE		4.2 will simulate lowercase on uppercase only terminal
ECHO		4.2 will echo your typing
CRMOD		4.2 will print "\r\n" for "\n" and will accept both
		"\r" and "\n" as end of line
RAW		none of terminal's output is special in any way to 4.2
		(in particular, 4.2 will hand ^S/^Q to user programs
		regardless of other stty settings)
ODDP		4.2 will accept odd parity and (iff EVENP is off) generate
		odd parity
EVENP		4.2 will accept even parity and will generate even parity
ANYP		4.2 will accept any parity and probably generate even parity
NLDELAY		4.2 will use 1 of 4 time delays after "\n" (control J):
		NL0 => none; NL1,NL2,NL3 increasing
TBDELAY		4.2 will use 1 of 3 time delays after "\t", or (if
		set to XTABS) will expand tabs to right number of spaces:
		TAB0 => none; TAB1, TAB2 increasing
CRDELAY		4.2 will use 1 of 4 time delays after "\r" (control M):
		CR0 => none; CR1,CR2,CR3 increasing
VTDELAY		4.2 will use 1 of 2 time delays after "\f": FF0 => none,
		FF1 => some
BSDELAY		4.2 will use 1 of 2 time delays after "\b": BS0 => none,
		BS1 => some
ALLDELAY	just == NLDELAY|TBDELAY|CRDELAY|VTDELAY|BSDELAY
CRTBS		4.2 will print "\b" character to back up cursor on CRT when
		terminal sends "erase" character (usually DEL or BS or #)
PRTERA		4.2 will print original text inside \/ to "erase" on printer
		when terminal sends "erase" character
CRTERA		4.2 will print "\b \b" to remove text from CRT when terminal
		sends "erase" character
TILDE		4.2 will print backquote instead of tilde (hazeltine kludge)
MDMBUF		4.2 will treat carrier drop as ^S, raise as ^Q.  BEWARE:
		depends on driver; standard DZ driver does not support it
LITOUT		4.2 will send user's 8 bit bytes from write() syscalls
		directly to terminal (no parity, no \n=>\r\n etc).  BUG:
		depends on driver; (re)setting baud rate typically necessary
		to force LITOUT to take effect
TOSTOP		4.2 will stop background processes that attempt to write
		to terminal (sends SIGTTOU; <sys/ioctl.h> comment is wrong)
FLUSHO		4.2 is flushing output to terminal (^O key normally toggles)
NOHANG		4.2 won't send SIGHUP when carrier drops
CRTKIL		4.2 will print "\b \b" to remove line from CRT when terminal
		sends "line kill" character (usually ^U or ^X or @)
CTLECH		4.2 will echo control characters as ^, char (^A, ^D etc)
PENDIN		4.2 will retype input line on next char from terminal
DECCTQ		4.2 will only restart output for ^Q after ^S (other input
		accepted but not yet echoed)
NOFLSH		4.2 will not flush output on signals


NOTES
-----

All of these are settable via stty(1) and TIOCGET/TIOCSET ioctl(2)s.
Some of these have aliases starting with L; these aliases are for
use with TIOCLGET, TIOCLSET, etc.

This is not a comprehensive list of ioctls.

I haven't included local additions for ^T, and hope I haven't included
any other local changes.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251)
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet:	chris at umcp-cs		ARPA:	chris at maryland