B Device Mapping; Memory Map; Dma Channel Assignments - Digital Equipment HiNote VP 500 Series Service Manual

Memory Map

Range
0h to 9FFFFh
A0000h to BFFFFh
C0000h to C7FFFh
C8000h to DFFFFh
E0000h to FFFFFh
100000h to 27FFFFFh

DMA Channel Assignments

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