Interrupt Request (Irq) Lines; Onboard Pci-Ide - TMC TI6NBF+ User Manual

Chapter 3 Hardware Description

3.7 Interrupt Request (IRQ) Lines

There is 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

3.8 Onboard PCI-IDE

The PCI-IDE controller is a part of the Intel 82440BX AGPset or VIA
Apollo Pro Plus chipset. It supports PIO mode 3/4 and bus mastering
Ultra DMA/33. The peak transfer rate of PIO mode 3/4 can be as high as
17MB/sec. Using HDDs that support Ultra DMA/33, the peak transfer
rate can reach 33MB/sec. There are two IDE connectors - primary IDE
and secondary IDE. With two devices per connector, up to four IDE
devices can be supported.
10 TI6NBF+ Pentium II/III ATX Motherboard User's Manual
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