t_stat i8259_io(IOHANDLER* ioh,uint32* value,uint32 rw,uint32 mask)
{
int port = ioh->offset;
I8259* chip = (I8259*)ioh->ctxt;
if (rw==MEM_WRITE) {
return chip->write ? chip->write(chip,port,*value) : i8259_write(chip,port,*value);
} else {
return chip->read ? chip->read(chip,port,value) : i8259_read(chip,port,value);
}
}
/*
* i8259_disable() - disable the specified interrupts
*
* This routine disables the interrupts specified by the bits in the
* mask parameter: 1 = disable, 0 = do not change.
*
* The old value is returned.
*/
uint8_t i8259_disable(memaddr_t i8259, uint8_t mask)
{
uint8_t old = i8259_read(i8259, i8259_ocw1);
i8259_write(i8259, i8259_ocw1, old | mask);
return old;
}
/*
* i8259_get_mask() - read the mask register
*/
uint8_t i8259_get_mask(memaddr_t i8259)
{
return i8259_read(i8259, i8259_ocw1);
}
/*
* i8259_set_mask() - set the mask register
*
* Sets the interrupt mask register to the specified value,
* returns the old value.
*/
uint8_t i8259_set_mask(memaddr_t i8259, uint8_t mask)
{
uint8_t old = i8259_read(i8259, i8259_ocw1);
i8259_write(i8259, i8259_ocw1, mask);
return old;
}
