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

GETSTS [OPCODE 062]
RELATED CALLS
0 CLRST.
0 ERLST.
0 FILOP.
0 SENSE.
0 SETSTS
0 STATO
0 STATZ
COMMON PROGRAMMING ERRORS
o
Forgetting that there is only one return from the call.
o If you give a nonexistent or uninitialized channel number,
the monitor stops your job and prints the following message
on your terminal:
?I/O to unassigned channel at user PC address
where address gives the program counter for your job at the
time of the failure.
o
Forgetting to clear the error status bits before retrying the
GETSTS function. An INPUT function followed by GETSTS will
not clear previously set bits. You should use SETSTS to
clear the I/O error bits before attempting to read the new
I/O error status.
22-164