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65ME / 65ME+
2-7.8 IRQ DESCRIPTION
• Both ISA and PCI expansion cards may require IRQs. System IRQs are
available to cards installed in the ISA expansion bus first, then any re-
maining IRQs are available to PCI cards. Currently, there are two types of
ISA cards.
• The original ISA expansion card design, now referred to as “Legacy” ISA
2-7.7 PS/2 MOUSE AND PS/2 KEYBOARD
IRQP 0P
System TimerPP
1
IRQBB
Function DescriptionB
Priority
IRQP 1P
Keyboard ControllerP
2P
IRQP 2P
Programmable InterruptP
N/A
IRQP 3P
Serial Port (COM 2)P
11
IRQP 4P
Serial Port (COM 1)P
12
IRQP 5PP
13P
IRQP 6P
Floppy Disk ControllerP
14
IRQP 7P
Parallel Port (LPT1)P
15
IRQP 8P
Real Time Clock (RTC)P
3
IRQP 9PP
4
IRQP 10PP
5P
IRQP 11PP
6P
IRQP 12P
PS/2 Mouse PortP
7
IRQP 13P
CoprocessorP
8
IRQP 14P
Primary IDE ChannelP
9
IRQP 15P
Secondary IDE ChannelP
10
PIN 6 : None
PIN 5 : Mouse Clock
PIN 4 : Vcc
PIN 3 : GND
PIN 2 : None
PIN 1 : Mouse Data
PS/2 MOUSE
PIN 6 : None
PIN 5 : Keyboard Clock
PIN 4 : Vcc
PIN 3 : GND
PIN 2 : None
PIN 1 : Keyboard Data
PS/2 KEYBOARD