DMA 4
Unused
DMA 5
Unused
DMA 6
Unused
DMA 7
Unused
Memory Map
Address Range
Length
Description
00000 - 9FFFFh
640 KB
System Memory
A0000
–
BFFFFh
128 KB
Video Memory
C0000
–
C9FFFh
40 KB
Video ROM
CA000
–
DBFFFh
72 KB
Unused
DC000 - DFFFFh
16 KB
DMI information
E0000
–
FFFFFh
128 KB
System ROM BIOS
IRQ Map
IRQ#
Description
IRQ 0
System Timer
IRQ 1
Keyboard
IRQ 2
IRQ 3
IRQ 4
IRQ 5
Audio/VGA/USB
IRQ 6
Floppy Disk Drive
IRQ 7
IRQ 8
RTC Alarm
IRQ 9
ACPI
IRQ10
LAN / Modem or Combo, (Card Bus), IEEE 1394
IRQ11
Reserved for PCMCIA card
IRQ12
Glide Pad
IRQ13
FPU (FERR)
IRQ14
Hard Disk Drive
IRQ15
CD-ROM or DVD-ROM
3.3.13 GPIO Pin Assignment
The GPI and GPO pins connected to system devices. The BIOS can get device
’
s
status and control the device via the GPI and GPO pins.
ICH4 GPI pin assignment
GPIO
Number
Signal Name Default I/O
Notes
GPIO0
PanelID0
I
Panel ID setting
GPIO1
PanelID1
I
Panel ID setting
GPIO2
PanelID2
I
Panel ID setting
GPIO3
PanelID3
I
Panel ID setting
TECHNICAL SERVICE MANUAL
Prestigio Cavaliere 142
41