TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

SKPINC [TTCALL 13,]
22.156 SKPINC [TTCALL 13,]
FUNCTION
Skips the next program instruction if at least one character can be
input from the job's controlling terminal. The SKPINC call does not
input a character. SKPINC clears the CTRL/O output state and sets the
terminal to "character mode", preventing the monitor from processing
control characters, such as DELETE and CTRL/U, as input line editing
commands.
This call is useful in a compute-bound program that should check
occasionally for user input.
CALLING SEQUENCE
SKPINC
return 1
return 2
In the calling sequence, the program supplies the call, which returns
to return 1 if there is no user input, or to return 2 is there is user
input.
RELATED CALLS
SKPINL
22-397