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- .th STTY II 12/15/74
- .sh NAME
- stty \*- set mode of typewriter
- .sh SYNOPSIS
- (stty = 31.)
- .br
- (file descriptor in r0)
- .br
- .ft B
- sys stty; arg
- .br
- .li
- ...
- .br
- arg: .byte ispeed, ospeed; .byte erase, kill; mode
- .s3
- .nf
- stty(fildes, arg)
- struct {
- char ispeed, ospeed;
- char erase, kill;
- int mode;
- } *arg;
- .fi
- .ft R
- .s3
- .sh DESCRIPTION
- .it Stty
- sets mode bits and character speeds for the typewriter whose file descriptor
- is passed in r0 (resp. is the first argument to the call).
- First, the system delays until the typewriter is quiescent.
- The input and output speeds are set from the first two bytes
- of the argument structure
- as indicated by the following table,
- which corresponds to the
- speeds supported by the DH-11 interface.
- If DC-11, DL-11 or KL-11 interfaces are used,
- impossible speed changes are ignored.
- .s3
- .lp +8 4
- 0 (hang up dataphone)
- .lp +8 4
- 1 50 baud
- .lp +8 4
- 2 75 baud
- .lp +8 4
- 3 110 baud
- .lp +8 4
- 4 134.5 baud
- .lp +8 4
- 5 150 baud
- .lp +8 4
- 6 200 baud
- .lp +8 4
- 7 300 baud
- .lp +8 4
- 8 600 baud
- .lp +8 4
- 9 1200 baud
- .lp +8 4
- 10 1800 baud
- .lp +8 4
- 11 2400 baud
- .lp +8 4
- 12 4800 baud
- .lp +8 4
- 13 9600 baud
- .lp +8 4
- 14 External A
- .lp +8 4
- 15 External B
- .s3
- .i0
- In the current configuration,
- only 110, 150 and 300 baud are really supported on dial-up lines,
- in that the code conversion and line control required for
- IBM 2741's (134.5 baud)
- must be implemented by the user's
- program,
- and the half-duplex line discipline
- required for the 202 dataset (1200 baud)
- is not supplied.
- .s3
- The next two characters of the argument structure
- specify the erase and kill characters respectively.
- (Defaults are # and @.)
- .s3
- The
- .it mode
- contains several bits which determine the
- system's treatment of the typewriter:
- .s3
- .lp +12 7
- 100000 Select one of two algorithms for backspace delays
- .lp +12 7
- 040000 Select one of two algorithms for form-feed and vertical-tab delays
- .lp +12 7
- 030000 Select one of four algorithms for carriage-return delays
- .lp +12 7
- 006000 Select one of four algorithms for tab delays
- .lp +12 7
- 001400 Select one of four algorithms for new-line delays
- .lp +12 7
- 000200 even parity allowed on input (e. g. for M37s)
- .lp +12 7
- 000100 odd parity allowed on input
- .lp +12 7
- 000040 raw mode: wake up on all characters
- .lp +12 7
- 000020 map CR into LF; echo LF or CR as CR-LF
- .lp +12 7
- 000010 echo (full duplex)
- .lp +12 7
- 000004 map upper case to lower on input (e. g. M33)
- .lp +12 7
- 000002 echo and print tabs as spaces
- .lp +12 7
- 000001 hang up (remove `data terminal ready,' lead CD) after last close
- .i0
- .s3
- The delay bits specify how long
- transmission stops to allow for mechanical or other movement
- when certain characters are sent to the terminal.
- In all cases a value of 0 indicates no delay.
- .s3
- Backspace delays are currently ignored but will
- be used for Terminet 300's.
- .s3
- If a form-feed/vertical tab delay is specified,
- it lasts for about 2 seconds.
- .s3
- Carriage-return delay type 1 lasts about .08 seconds
- and is suitable for the Terminet 300.
- Delay type 2 lasts about .16 seconds and is suitable
- for the VT05 and the TI 700.
- Delay type 3 is unimplemented and is 0.
- .s3
- New-line delay type 1 is dependent on the current column
- and is tuned for Teletype model 37's.
- Type 2 is useful for the VT05 and is about .10 seconds.
- Type 3 is unimplemented and is 0.
- .s3
- Tab delay type 1 is dependent on the amount of movement
- and is tuned to the Teletype model
- 37.
- Other types are unimplemented and are 0.
- .s3
- Characters with the wrong parity, as determined by bits 200 and
- 100, are ignored.
- .s3
- In raw mode, every character is passed immediately
- to the program without waiting until a full line has been typed.
- No erase or kill processing is done;
- the end-of-file character (EOT), the interrupt character
- (DEL) and the quit character (FS) are not treated specially.
- .s3
- 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).
- .s3
- The hangup mode 01
- causes the line to be disconnected
- when the last process with the line open closes it or terminates.
- It is useful when a port is to be used for some special
- purpose;
- for example, if it is associated
- with an ACU used to place outgoing calls.
- .s3
- This system call is also used with certain special
- files other than typewriters,
- but since none of them are part of the standard system
- the specifications will not be given.
- .sh "SEE ALSO"
- stty (I), gtty (II)
- .sh DIAGNOSTICS
- The error bit
- (c-bit) is set if the file descriptor does not refer to a typewriter.
- From C, a negative value indicates an error.
-