FUJITSU ErgoPro m664 - Manual (Page 91)

PC Specialist's Handbook ErgoPro m664-series
Edition 1 - Release 1 - March 1998 Page 9-9
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 Function
NMI Parity error (System memory does not have parity checking)
Master (Controller 1)
IRQ0 Timer output 0 (internal)
IRQ1 Keyboard controller
IRQ2 Interrupt from slave
IRQ3 COM2
IRQ4 COM1
IRQ5 Optional Creative Vibra 16XV audio (PnP ISA) by default
IRQ6 Diskette drive controller
IRQ7 LPT1
Slave (Controller 2)
IRQ8 Real-time Clock
IRQ9
IRQ10
IRQ11
IRQ12 PS/2-type mouse device
IRQ13 Math co-processor error
IRQ14 Primary IDE interface
IRQ15 Secondary IDE interface