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5-13
STANDARD AND PTS INTERRUPTS
When you assign an interrupt to the PTS, you must set up a PTS control block (PTSCB) for each
interrupt source (see “Initializing the PTS Control Blocks” on page 5-24) and use the EPTS in-
struction to globally enable the PTS. When you assign an interrupt to a standard software service
routine, use the EI (enable interrupts) instruction to globally enable interrupt servicing.
NOTE
The DI (disable interrupts) instruction does not disable PTS service. However,
it does disable service for the end-of-PTS interrupt request. If an interrupt
request occurs while interrupts are disabled, the corresponding pending bit is
set in the INT_PEND or INT_PEND1 register.
PTS service is not useful for multiplexed interrupts because the PTS cannot
readily determine the source of these interrupts.