pTAL Conversion Guide

pTAL Built-In Routines

pTAL Conversion Guide—527302-002

18-32

$INTERROGATEIO

$INTERROGATEIO ( select, ! o

select output

sINT:variable

is an integer variable that is always set to 0.

rank-channel output

sINT:variable

is an integer variable that is always set to 0.

ric-int-cause output

sINT:variable

is the read interrupt cause received from the controller holding the completed I/O.

rist-int-cause output

sINT:variable

is the read interrupt status received from the controller holding the completed I/O.

channel-status output

sINT:variable

is an integer variable that holds the status returned by the controller.

pTAL privileged procedure Yes

Can be executed only by privileged procedures Yes

Sets condition code Yes

Sets $CARRY No

Sets $OVERFLOW No

Figure 18-11. TAL Code Equivalent to $INTERROGATEIO Routine

STACK 0,0;

CODE(IIO);

STORE channel_status;

STORE rist_interrupt_status;

STORE ric_interrupt_status;

STORE rank_channel;

STORE select;