Theory of Operation
Timer 0
Timer 2
IR0
IR1
IR2
IR3
IR4
IR5
IR6
IR7
8087 Interrupt
INTRQ1*
FP1/
INTRQ*
FP3/
COM2*
Timer 1
COM1*
Power Fail/
FP5/
INTRQ2*
FP6/
LPT1
FP7/
Interrupt LevelJumper Selections
W5
W4
W6
W7
W8
W2,W9
W3,W10
W11
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Figure 3–1. PIC Interrupt Input Requests.
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