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M00 and M01: "mode bits" of port 0
M10 and M11: "mode bits" of port 1
E0, E1: triggering edge control bits
F0, F1: flag bits
In t e r r u p t So u r c e Co n t r o l
The "mode bits" in the interrupt control register determine the allow-
able sources of signals generating an interrupt. Bit 0 and bit 1 deter-
mine the interrupt source for port 0, and bit 4 and bit 5 determine the
interrupt source for port 1, as indicated in Figure 3-3. Table 3-3 shows
the relationship between an interrupt source and the values in the
mode bits.
Figure 3-3: Interrupt sources
2 0
PCI-1751
User's Manual
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