Interrupt Levels - Fujitsu ErgoPro m664 Series Specialist's Handbook

PC Specialist's Handbook

Interrupt levels

Two programmable interrupt controllers supply interrupt control. The controllers are cascaded together as a
master-slave pair and provide 15 ISA-compatible interrupt levels. Excluding NMI, all interrupts can be masked.
Controllers are 8259A compatible.
The table below shows the interrupt level assignments.
Interrupt
NMI
Master (Controller 1)
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
Slave (Controller 2)
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
Edition 1 - Release 1 - March 1998
Function
Parity error (System memory does not have parity checking)
Timer output 0 (internal)
Keyboard controller
Interrupt from slave
COM2
COM1
Optional Creative Vibra 16XV audio (PnP ISA) by default
Diskette drive controller
LPT1
Real-time Clock
PS/2-type mouse device
Math co-processor error
Primary IDE interface
Secondary IDE interface
ErgoPro m664-series
Page 9-9