Ampro Corporation LITTLE BOARD 5001451A - Manual (Page 29)

Little Board P6d Module
2-11
DMA channel not already in use. For your convenience, Table 2-7 and Table 2-8 provide a summary
of the normal interrupt and DMA channel assignments on the Little Board P6d module.
The PCI bus uses four interrupts (INTA*, INTB*, INTC*, and INTD*). These interrupts are
mapped to any of the available ISA interrupts by the BIOS. If an expansion card has multiple
functions, then more interrupts may be required. You can set the priority in which interrupts are
assigned on Setup 6 — PCI Configuration Setup.
Table 2-7. Interrupt Channel Assignments
Interrupt Function
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
ROM BIOS clock tick function, from Timer 0
Keyboard interrupt
Cascade input for IRQ8-15
Serial 2, Serial 4
Serial 1, Serial 3
PCI
Floppy controller
Parallel port (option)
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
Reserved for battery-backed clock alarm
PCI
PCI, Serial 3, Serial 4
PCI
PS/2 Mouse, Serial 3, Serial 4
Reserved for coprocessor
Primary IDE hard disk controller
Secondary IDE hard disk controller
Note: IRQs for the Ethernet, Video, and Audio interfaces are automatically assigned
by the BIOS plug and play logic.
PCI Interrupts assigned during initialization cannot be used by non-PCI
devices.