Chapter 3
Hardware
LittleBoard 700
Reference Manual
23
Interrupt Channel Assignments
The channel interrupt assignments are shown in Table 3-1.
Table 3-1. Interrupt Channel Assignments
Device vs IRQ No.
0
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
Timer
X
Keyboard
X
Secondary
Cascade
X
COM1
O
D
COM2
D
O
COM3
O
O
O
D
COM4
O
O
D
O
Floppy
X
Parallel
O
D
RTC
X
IDE Primary
X
O
IDE Secondary
O
X
Math Coprocessor
X
PS/2 Mouse
X
PCI INTA
Automatically Assigned
PCI INTB
Automatically Assigned
PCI INTC
Automatically Assigned
PCI INTD
Automatically Assigned
Sound Blaster
D
O
O
O
USB
Automatically Assigned
VGA
Automatically Assigned
Ethernet
Automatically Assigned
Legend:
D = Default, O = Optional, X = Fixed
NOTE
The IRQs for the Ethernet, Video, and Internal Local Bus (ISA) are
automatically assigned by the BIOS Plug and Play logic. Local IRQs
assigned during initialization can not be used by external devices.
Memory Map
The following table provides the common PC/AT memory allocations. Memory below 000500h is used
by the BIOS.
Summary of Contents for Little Board 700
Page 1: ...Little Board 700 Single Board Computer Reference Manual P N 5001670A Revision D...
Page 6: ...Contents vi Reference Manual LittleBoard 700...
Page 10: ...Chapter 1 About This Manual 4 Reference Manual LittleBoard 700...
Page 26: ...Chapter 2 Product Overview 20 Reference Manual LittleBoard 700...
Page 82: ...Chapter 4 BIOS Setup 76 Reference Manual LittleBoard 700...
Page 84: ...Appendix A Technical Support 78 Reference Manual LittleBoard 700...
Page 86: ...Appendix B Connector Part Numbers 80 Reference Manual LittleBoard 700...
Page 89: ......
Page 90: ......
