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System Introduction 1-19
1.6 System Configurations and Specifications
1.6.1 System Memory Map
Table 1-8 System Memory Map
Address Range Definition Function
000000 -09FFFF 640 KB memory Base memory
0A0000 -0BFFFF 128 KB video RAM Reserved for graphics display buffer
0C0000 -0CBFFF Video BIOS Video BIOS
0CC000 -0CDFFF
0CE000 -0CFFFF
System CardBus
Mini dock CardBus
0F0000 -0FFFFF 64 KB system BIOS System BIOS
010000 -07FFFF
080000 -027FFF
Extended memory Onboard memory
SIMM memory
FE0000 -FFFFFF 256 KB system ROM Duplicate of code assignment at 0E0000-0FFFFF
1.6.2 Interrupt Channel Map
Table 1-9 Interrupt Channel Map
Interrupt Number Interrupt Source (Device Name)
IRQ 0
IRQ 1
IRQ 2
IRQ 3
IRQ 4
IRQ 5
IRQ 6
IRQ 7
IRQ 8
IRQ 9
IRQ 10
IRQ 11
IRQ 12
IRQ 13
IRQ 14
IRQ 15
System Timer
Keyboard
Cascade
IrDA / 2F8h
Serial Port 1 / 3F8h
Audio
Floppy Disk Controller (FDC)
Parallel Port
Real Time Clock (RTC)
USB/System CardBus
Reserved for PCMCIA card
Reserved for PCMCIA card/Mini dock CardBus
PS/2 Mouse
Co-processor
Hard disk
CD-ROM
1.6.3 I/O Address Map
Table 1-10 I/O Address Map
Address Range Device
000 -00F
020 -021
02E -02F
040 -043
048 -04B
DMA controller-1
Interrupt controller-1
NS87338 peripheral controller
Timer 1
Timer 2