This chapter describes how to use the STAX service routine in your programs to handle attention interruptions.

Use the STAX service routine in your Command Processor or problem program to cause the system to recognize and schedule an attention exit that receives control when an attention interruption occurs. Your program provides the address of an attention exit routine to the system by issuing the STAX macro instruction.

The STAX service routine may be invoked in either 24-, 31-, or 64-bit addressing mode. Your attention exit routine receives control in the same addressing mode in which the corresponding STAX macro is issued.

For information on writing attention exit routines, see z/OS TSO/E Programming Guide.