48
* Audio DMA defaults setting: DMA 1.5
Audio High DMA select: DMA 1.3
Audio Low DMA select: DMA 5.6.7
** parallel port DMA default setting: DMA 3
parallel port DMA select: DMA 1.3
B.3 Interrupt assignments
Interrupt #
Interrupt source
NMI
Parity error detected
IRQ 0
System timer
IRQ 1
Keyboard
IRQ 2
Interrupt from controller 2 (cascade)
IRQ 8
Real-time clock
IRQ 9
REALTEK 8139C
IRQ 10
Serial communication port 4
IRQ 11
Serial communication port 3
IRQ 12
PS/2 mouse
IRQ 13
Numeric data processor
IRQ 14
CS5530A Primary IDE controller
IRQ 15
CS5530A Second IDE controller
IRQ 3
Serial communication port 2
IRQ 4
Serial communication port 1
IRQ 5
Audio*
IRQ 6
Diskette controller (FDC)
IRQ 7
Parallel port 1 (print port)
* Audio default setting: IRQ5
Ethernet IRQ is automatic set by the system
49
B.4 1
st
MB memory map
Address Description
F000h-FFFFh
System ROM
D800h-EFFFh
Unused
C800h-D7FFh
Ethernet ROM*
C000h-C7FFh
Expansion ROM*
B800h-BFFFh
CGA/EGA/VGA text
B000h-B7FFh
Unused
A000h-AFFFh
EGA/VGA graphics
0000h-9FFFh
Base memory
D000-D400H Available
* Default setting
** If Ethernet boot ROM is enabled.