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© Sealevel Systems, Inc.
8006H Manual | SL9023H 9/2021
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.
IRC1
IRC0
Interrupt Type
0
0
Low Level
0
1
High Level
1
0
Falling Edge
1
1
Rising Edge
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
(D0) Interrupt Status
1 = interrupt pending, 0 = none
