DEC DECpc 433 - Device Mapping; System Memory Map

Introduction
D
Device Mapping
Tables D-1 through D-4 contain information about the memory map, 1/0
address map, interrupt map, and LAN memory map, respectively.
Table D-1. System Memory Map
Address
Range (in hex) Function
Size
Shadow
Cache
WPt
0010 0000 to Extended 47MB No
Yest
No
02FFFFFF memory
OOOFOOOO to System
64KB
Yest Yest
Yes
OOOF FFFF
BiOSiSCSI
BIOS
OOOEOOOOto System 64KB No
Yest
Yes
OOOEFFFF
BIOS
Setup/EMS
OOOD 8000 to
LAN 32KB No
No
No
OOODFFFF
BIOS/RAM
OOOD 0000 to LAN RAM
32KB No
No
No
OOOD7FFF
OOOC 8000 to Video
32KB No
No
No
OOOCFFFF buffer
OOOCOOOO to
Video
BIOS
32KB
Yest Yest
No
OOOC7FFF
OOOAOOOO to Video RAM
128KB
No No No
OOOBFFFF
OOOOOOOOto Base
640KB No
Yest
No
l 0009 FFFF
memory
t Can also be disabled
t Write protected (not cached in the i486)
DECpc 433 Workstation Service Guide
0-1