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Chapter 3 Hardware Description
12 TI5VG Pentium VP3 ATX Motherboard User’s Manual
3.10 Interrupt Request Lines (IRQ)
There are a total of 15 IRQ lines available on the motherboard. Peripheral
devices use interrupt request lines to notify the CPU for the service
required. The following table shows the IRQ used by the devices on the
motherboard.
Level Function
IRQ0 System Timer Output
IRQ1 Keyboard
IRQ2 Interrupt Cascade
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ5 Parallel Port #2
IRQ6 Floppy Disk Controller
IRQ7 Parallel Port #1
IRQ8 Real Time Clock
IRQ9 Software Redirected to Int 0Ah
IRQ10 Reserved
IRQ11 Reserved
IRQ12 Reserved
IRQ13 80287
IRQ14 Primary IDE
IRQ15 Secondary IDE
3.11 Accelerated Graphics Port (AGP) Slot
The TI5VG motherboard comes with an AGP slot for an AGP VGA card
that supports 133MHz 2X mode for AD and SBA signaling to provide
high-performance 3D graphic display.