SeaLevel DIO-32.PCI User Manual page 13

PROGRAMMING THE DIO-32.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
Optional 3093 Migration Cable (CA378)
On the 3093 ISA digital I/O board, the input pins #1 and #19 are reversed from the standard CA165 cable
that ships standard with the 8004. If you are upgrading from a 3093 ISA board to an 8004 PCI board and
wish to preserve existing infrastructure wiring, order the CA378 cable and use it in place of the standard
CA165 cable.
© Sealevel Systems, Inc.
IRC1 IRC0
0 0
0 1
1 0
1 1
(D0) Interrupt Status
8004 Manual | SL9022 9/2021
Interrupt Type
Low Level
High Level
Falling Edge
Rising Edge
1 = interrupt pending, 0 = none
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