Technical data

Digital HiNote VP 500 Service Guide
B–1
B
Device Mapping
Memory Map
Range
Name
Function
0h to 9FFFFh
640KB System Memory
System Memory Space
A0000h to BFFFFh
128K Video Memory
Graphics Display Memory Buffer
C0000h to C7FFFh
32KB Video BIOS ROM
Shadow BIOS of VGA
C8000h to DFFFFh
96KB I/O Expansion ROM
Reserved ROM Space for I/O
Adapter
E0000h to FFFFFh
128KB System ROM
BIOS of System and VGA
100000h to 27FFFFFh
Additional Memory Space
Extended Memory Space, Size
from 8MB up to 40MB
DMA Channel Assignments
Channel
Controller
Function
0 1
Not used
1 1
Sound
2 1
Diskette controller
3 1
Not used
4 2
Cascade DMA
5 2
Not used
6 2
Not used
7 2
Not used