pTAL Reference Manual (G06.24+, H06.09+, J06.03+)

$INTERROGATEHIO stores cause and status information from a high-priority I/O interrupt, which
the operating system uses to reset the interrupt
NopTAL privileged procedure
YesCan be executed only by privileged procedures
YesSets condition code
NoSets $CARRY
NoSets $OVERFLOW
select
output
uINT:variable
is an integer variable that is always set to 0.
rank-channel
output
uINT:variable
is an integer variable that is always set to 0.
ric-int-cause
output
uINT:variable
is the read interrupt cause received from the controller holding the completed I/O.
rist-int-cause
output
uINT:variable
is the read interrupt status received from the controller holding the completed I/O.
channel-status
output
uINT:variable
is an integer variable that holds the status returned by the controller.
Nonatomic Operations 319