User manual

25 SOM-4430 User Manual
Appendix C System Assignments
C.3 Interrupt Assignments
C.4 1st MB Memory Map
Table C.3: Interrupt Assignments
Interrupt# Interrupt source
NMI Parity error detected
IRQ 0 Interval timer
IRQ 1 Keyboard
IRQ 2 Available
IRQ 3 Serial communication port 2
IRQ 4 Serial communication port 1
IRQ 5 Serial communication port 5
IRQ 6 Diskette controller (FDC)
IRQ 7 LPT
IRQ 8 Real-time clock
IRQ 9 Microsoft ACPI ®C compliant System
IRQ 10 Serial communication port 3
IRQ 11 Serial communication port 4
IRQ 12 PS/2 mouse
IRQ 13 INT from co-processor
IRQ 14 Preliminary IDE
IRQ 15 Network
USB and Ethernet IRQ is automatically set by the system
Table C.4: 1st MB Memory Map
Addr. range (Hex) Device
F000h - FFFFh System ROM
E000h - EFFFh Reserved for BIOS boot
D000h - DFFFh Available when LAN boot disabled
C000h - CFFFh VGA BIOS
B800h - BFFFh CGA/EGA/VGA text
B000h - B7FFh Reserved for graphic mode usage
A000h - AFFFh EGA/VGA graphics
0000h - 9FFFh Base memory