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Interrupt handling
The PCL-731 offers two I/O lines, PC00 and PC10, which you can
use to generate a hardware interrupt to the CPU. Interrupts are
edge-triggered. Please refer to page 10 for jumper settings and
description.
Note:
Since the PCL-731’s digital input data are not
latched, the card provides no “first event” trapping
to determine which input was active first.
Although interrupts are normally triggered by external signals, the
PCL-731 can send output data to emulate an interrupt singal. See
the example programs in the following section.
Chapter 3
Operation
17