V3/man/man2/stty.2

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.he 'STTY (II)'6/12/72'STTY (II)'
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NAME		stty  --  set mode of typewriter
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SYNOPSIS	(file descriptor in r0)
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sys stty; arg  / stty = 31.
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...
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arg:  dcrsr; dctsr; mode
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DESCRIPTION	stty____
sets mode bits for a typewriter whose file descriptor
is passed in r0.
First, the system delays until the typewriter is quiescent.
Then, the argument dcrsr_____ is placed into the typewriter's
receiver control and status register,
and dctsr_____ is placed in the transmitter control and status register.
The DC-11 manual must be consulted for the format of these
words.
For the purpose of this call, the most important ro^le of
these arguments is to adjust to the speed of the typewriter.
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The mode____ argument contains several bits which determine the
system's treatment of the typewriter:
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200  even parity allowed on input (e. g. for M37s)
100  odd parity allowed on input
040  raw mode: wake up on all characters
020  map CR into LF; echo LF or CR as LF-CR
010  echo (full duplex)
004  map upper case to lower on input (e. g. M33)
002  echo and print tabs as spaces
001  inhibit all function delays (e. g. CRTs)
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.in -3
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Characters with the wrong parity, as determined by bits 200 and
100, are ignored.
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In raw mode, every character is passed back immediately
to the program.  No erase or kill processing is done;
the end-of-file character (EOT), the interrupt character
(DELETE) and the quit character (FS) are not treated specially.
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Mode 020 causes input carriage returns to be turned into
new-lines;
input of either CR or LF causes LF-CR both to
be echoed
(used for GE TermiNet 300's and other terminals without the newline function).
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Additional bits in the high order byte of the mode argument
are used to indicate that the terminal is an IBM|2741
and to specify 2741 modes.
These mode bits are:
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|400  terminal is an IBM|2741
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1000  the 2741 has the transmit interrupt feature (currently ignored)
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2000  use correspondence code conversion on output
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4000  use correspondence code conversion on input (currently ignored)
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.in -8
.ll-6
Normal input and output code conversion
for 2741s is EBCDIC (e. g. 963 ball and corresponding keyboard).
The presence of the transmit interrupt feature permits
the system to do read-ahead while no output is in progress.
In 2741 mode, the low order bits 331 are ignored.
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SEE ALSO	stty(I), gtty(II)
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DIAGNOSTICS	The error bit
(c-bit) is set if the file descriptor does not refer to a typewriter.
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BUGS		This call should be used with care.
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