B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the
service required. The following table shows the IRQ used by the devices
on board.
Level
Function
IRQ0
System Timer Output
IRQ1 Keyboard
IRQ2 Interrupt
Cascade
IRQ3
Serial Port #2
IRQ4
Serial Port #1
IRQ5 Reserved
IRQ6
Floppy Disk Controller
IRQ7
Parallel Port #1
IRQ8
Real Time Clock
IRQ9 Reserved
IRQ10 Reserved
IRQ11 Reserved
IRQ12 PS/2
Mouse
IRQ13 80287
IRQ14 Primary
IDE
IRQ15 Secondary
IDE
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2807950 User's Manual
Summary of Contents for 2807950
Page 1: ...User s Manual Version 1 0 April 2008 Mini ITX Motherboard 2807950 2807950 User s Manual ...
Page 16: ...Connector Locations on 2807950 12 2807950 User s Manual ...
Page 17: ...2807950 Solder Side 13 2807950 User s Manual ...
Page 30: ...INSTALLATIONS This page is intentionally left blank 26 2807950 User s Manual ...