Appendix
118
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
CC000 - CDFFF
CE000 - CFFFF System CardBus
MiniDock CardBus
0F0000 -
0FFFFF 64 KB system
BIOS System BIOS
10000 - 7FFFF
80000 - 27FFF Extended memory Onboard memory
SIMM memory
FE0000 -
FFFFFF 256 KB system
ROM Duplicate of code
assignment at 0E0000-
0FFFFF
I/O Address Map
Address Range Device
000 - 00F
020 - 021
02E - 02F
040 - 043
048 - 04B
060 - 06E
070 - 071
080 - 08F
0A0 - 0A1
0C0 - 0DF
DMA controller-1
Interrupt controller-1
NS87338 peripheral controller
Timer 1
Timer 2
Keyboard controller chip select
Real-time clock and NMI mask
DMA page register
Interrupt controller-2
DMA controller-2