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

PIFLG. [CALLI 216]
22.123 PIFLG. [CALLI 216]
FUNCTION
The PIFLG. monitor call allows you to retrieve the PC flags of the
highest level pending interrupt that have been stored in the monitor.
Flags are stored in the monitor if you are using extended addressing
format, set by the PS.IEA bit of the PIINI. monitor call.
This call does not cause an interrupt when UUO interrupts are enabled.
CALLING SEQUENCE
/ MOVEI ac, .PSFRD \
\ MOVE ac, [flags" .PSFWT] /
PIFLG. ac,
error return
skip return
In the calling sequence, the program supplies the flags, which are one
or more of the interrupt PC flags. The function codes are:
Code
o
1
Symbol
.PSFRD
. PSFWT
Function
Read interrupt flags.
write interrupt flags .
SKIP RETURN
The requested action is performed.
Flags, are returned in the ac.
ERROR RETURN
One of the following codes in returned in the ac:
Code Symbol Error
0 PSFNI% PSI system not initialized.
1 PSFNP% No interrupt in progress.
2 PSFEA% Extended addressing format for PI system not
use.
3 PSFIF% Illegal function code.
in
RELATED CALLS
0 DEBRK.
0 PIBLK.
0 PIINI.
0 PIJBI.
0 PIRST.
0 PISAV.
0 PISYS.
0 PITMR.
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