40
3
VMICPCI-7611 Product Manual
9
Old IRQ2
SVGA or Network I/O
10
Not Assigned
Determined by BIOS
11
Not Assigned
Determined by BIOS
12
Mouse
13
Math Coprocessor
14
AT Hard Drive
15
Flash Drive
Table 3-3 PC/AT Interrupt Vector Table
INTERRUPT NO.
IRQ
LINE
REAL MODE
PROTECTED MODE
HEX
DEC
00
0
Divide Error
Same as Real Mode
01
1
Debug Single Step
Same as Real Mode
02
2
NMI
Memory Parity Error,
CompactPCI Interrupts
Same as Real Mode
(Must be enabled in BIOS Setup)
03
3
Debug Breakpoint
Same as Real Mode
04
4
ALU Overflow
Same as Real Mode
05
5
Print Screen
Array Bounds Check
06
6
Invalid OpCode
07
7
Device Not Available
08
8
IRQ0
Timer Tick
Double Exception Detected
09
9
IRQ1
Keyboard Input
Coprocessor Segment Overrun
0A
10
IRQ2
BIOS Reserved
Invalid Task State Segment
0B
11
IRQ3
COM2 Serial I/O
Segment Not Present
0C
12
IRQ4
COM1 Serial I/O
Stack Segment Overrun
0D
13
IRQ5
Timer
Same as Real Mode
0E
14
IRQ6
Floppy Disk Controller
Page Fault
0F
15
IRQ7
LPT1 Parallel I/O
Unassigned
10
16
BIOS Video I/O
Coprocessor Error
Table 3-2 PC/AT Hardware Interrupt Line Assignments (Continued)
IRQ
AT FUNCTION
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