Table of Contents
Advertisement
Table B.1: System I/O ports
Addr. range (Hex)
CF8-CFB
CFC-CFF
D00-FFFF
B.2 1st MB memory map
Table B.2: 1st MB memory map
Addr. range (Hex)
F0000h - FFFFFh
*D0000h - EFFFFh
C0000h - CFFFFh
B8000h - BFFFFh
B0000h - B7FFFh
A0000h - AFFFFh
00000h - 9FFFFh
* If Ethernet boot ROM is disabled (Ethernet ROM occupies about 16 KB)
* E0000 - EFFFF is reserved for BIOS POST
B.3 DMA channel assignments
Table B.3: DMA channel assignments
Channel
0
1
2
3
4
5
6
7
* Parallel port ECP mode DMA select 1 or 3
Download from Www.Somanuals.com. All Manuals Search And Download.
Device
PCI Configuration Address
PCI Configuration Data
-available for system use-
Device
System ROM
Unused (reserved for Ethernet ROM)
Expansion ROM (for VGA BIOS)
CGA/EGA/VGA text
Unused
EGA/VGA graphics
Base memory
Function
Available
Available (audio)
Floppy disk (8-bit transfer)
Available (parallel port)
Cascade for DMA controller 1
Available
Available
Available
73
Appx. B
Advertisement
Table of Contents
