pTAL Reference Manual (H06.03+)

Built-In Routines

HP pTAL Reference Manual—523746-005

15-56

$INTERROGATEHIO

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.

pTAL privileged procedure No

Can be executed only by privileged procedures Yes

Sets condition code Yes

Sets $CARRY No

Sets $OVERFLOW No

Example 15-46. $INTERROGATEHIO Routine

INT select;

INT rank_channel;

INT ric_interrupt_status;

INT rist_interrupt_cause;

INT channel_status;

$INTERROGATEHIO(select, rank_channel, ric_interrupt_status,

rist_interrupt_status, channel_status);