Miles Sound System SDK 7.2a

DDK Digital Function: IRQ_acknowledge

Discussion

Input:

IRQ variable in VDI_HDR = interrupt #

Output:

Nothing
All registers preserved

Purpose:

Acknowledges the current IRQ

Notes:

This routine must be called prior to returning from a sound ISR. It sends an end-of-interrupt (EOI) command to the Programmable Interrupt Controller (PIC) device, to prepare for subsequent interrupts.

It is not necessary (or advisable) to call IRQ_acknowledge if the IRQ_validate function (above) returns with C=0.

Does not require valid DS register.

Group: DDK Support Routines for Digital Sound Drivers
Related Structures: VDI_HDR