I have an ISA board using interrupt 5. I am trying to set up an interrupt
handler for this board that uses system interrupt 13. The following code
was used to do this in dos.
/* Port addresses for the 8259A interrupt controller */
#define INT_MASK_PORT 0x0021
#define INT_CONTROLLER 0x0020
#define SPECIFIC_EOI_IR5 0x0065
/******************************************************/
void interrupt HS_Int_Handler (...) {
.
.
handler code
.
.
}
Orig_Int_13_Handler = dos_getvect (13);
_dos_setvect (13, HS_Int_Handler);
outportb (INT_MASK_PORT, inportb (INT_MASK_PORT) & ~IRQ_5);
outportb (INT_CONTROLLER, SPECIFIC_EOI_IR5);
_enable();
.
.
.
collect data
.
.
.
//Disable interrupt from HS
outportb (INT_MASK_PORT, inportb (INT_MASK_PORT) | IRQ_5);
_dos_setvect (13, Orig_Int_13_Handler);
outportb(INT_CONTROLLER, SPECIFIC_EOI_IR5);
_enable
How do I do this in rtlinux??
Thanks for any help,
Patrick
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