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

STATZ [OPCODE 063]
22.163 STATZ [OPCODE 063]
FUNCTION
Tests the I/O status (also called "file status") word for a device and
skips if all of the specified bits are cleared. Use FILOP. to perform
a STATZ on an extended I/O channel. For a complete list of I/O status
bits, refer to the appropriate device chapter in Volume 1.
CALLING SEQUENCE
STATZ channo,mask
return 1
return 2
In the calling sequence, the program supplies the following variables:
o
o
channo is the number of an initialized channel.
mask is a halfword in which each bit that you set corresponds
to a bit in the I/O status word.
The I/O status bits are a set of 18 bits (right half) that reflect the
current state of a file transmission. They are initially set by your
program with the INIT/OPEN monitor call. Thereafter, the monitor sets
the bits, but your program can test and reset them with any of several
monitor calls.
RETURN
The call returns to return 1 if one or more of the specified bits is
1, or to return 2 if all of-the specified bits are O.
RELATED CALLS
o
o
o
FILOP.
SETSTS
STATO.
COMMON PROGRAMMING ERRORS
Forgetting to initialize the I/O channel.
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