American Megatrends Enterprise-III User Manual download pdf (Page 68)

APPENDIX

MI953 User’s Manual

B. Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the

service required. The following table shows the IRQ used by the devices

on board.

Level Function

IRQ0 System Timer Output

IRQ1 Keyboard

IRQ2 Interrupt Cascade

IRQ3 Serial Port #2

IRQ4 Serial Port #1

IRQ5 Reserved

IRQ6 Reserved

IRQ7 Reserved

IRQ8 Real Time Clock

IRQ9 Reserved

IRQ10 Serial Port #3

IRQ11 Serial Port #4

IRQ12 PS/2 Mouse

IRQ13 80287

IRQ14 Primary IDE

IRQ15 Secondary IDE

1 2 ... 63 64 65 66 67 68 69 70 71 72

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American Megatrends Enterprise-III User Manual Page 68