Interrupt Request (Irq) Lines; Onboard Multi-I/O - TMC LI6BM User Manual

Chapter 3 Hardware Description

3.8 Interrupt Request (IRQ) Lines

There are a total of 15 IRQ lines available on the motherboard. Peripheral
devices use an interrupt request to notify the CPU for the service
required. The following table shows the IRQ lines used by the devices on
the motherboard:
Level
IRQ0
IRQ1
IRQ2
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7

3.9 Onboard Multi-I/O

The onboard multi-I/O chip, W83977TF, supports a keyboard controller
(AMI copyright), two serial ports, one parallel port, one floppy controller
and one IrDA port. The serial ports are 16550 UART compatible. The
parallel port features high-speed EPP/ECP mode. The floppy controller
supports up to 2.88 MB format.
The multi-I/O also features keyboard power-on that is configured in the
Power On Function field of the Integrated Peripherals section in the
BIOS. It allows users to enter a password of a maximum of five
characters (0~9, A~Z). Hot keys to power on supported are the function
keys (Ctrl-F1~Ctrl-F12).
12
Function
System Timer Output
Keyboard
Interrupt Cascade
Real Time Clock
Software Redirected to Int 0Ah or PCI Slot Int#
Reserved or PCI Slot Int#
Reserved or PCI Slot Int#
PS/2 Mouse or PCI Slot Int#
Co-Processor
Primary IDE
Secondary IDE
Serial Port #2
Serial Port #1
Parallel Port #2 or PCI Slot Int#
Floppy Disk Controller
Parallel Port #1
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