SeaLevel ISO-16.PCI User Manual page 13

PROGRAMMING THE ISO-16.PCI, CONTINUED
Interrupt Mode Select Table
Interrupt source is Base+0 bit D0. When selecting the Interrupt Type, always disable interrupts prior to
changing or setting states. This will help prevent inadvertent or unexpected interrupts from occurring.
When using the High and Low Level interrupts, an interrupt occurs when input D0 changes to either
a High or Low state. This will cause the computer to remain in an interrupt state until the input state
changes.
Interrupt Read
Reading the Interrupt Status port (Base+5) clears any interrupt pending.
IRQST
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IRC1 IRC0
0 0
0 1
1 0
1 1
(D0) Interrupt Status
8006H Manual | SL9023H 9/2021
Interrupt Type
Low Level
High Level
Falling Edge
Rising Edge
1 = interrupt pending, 0 = none
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