beautypg.com

C.2 1st mb memory map, Table c.2: 1st mb memory map, C.3 dma channel assignments – Intel M600 User Manual

Page 101: Table c.3: dma channel assignments, 1st mb memory map, Table c.2:1st mb memory map, Dma channel assignments, Table c.3:dma channel assignments

background image

91

Appendix C

C.2 1st MB memory map

C.3 DMA channel assignments

Table C.2: 1st MB memory map

Addr. range (Hex)

Device

F0000h - FFFFFh

System ROM

*CC000h - EFFFFh

Unused (reserved for Ethernet ROM)

C0000h - CBFFFh

Expansion ROM (for VGA BIOS)

B8000h - BFFFFh

CGA/EGA/VGA text

B0000h - B7FFFh

Unused

A0000h - AFFFFh

EGA/VGA graphics

00000h - 9FFFFh

Base memory

* If Ethernet boot ROM is disabled (Ethernet ROM occupies about 16 KB)
* E0000 - EFFFF is reserved for BIOS POST

Table C.3: DMA channel assignments

Channel

Function

0

Available

1

Reserved (audio)

2

Floppy disk (8-bit transfer)

3

Available (parallel port)

4

Cascade for DMA controller 1

5

Available

6

Available

7

Available

* Audio DMA select 1, 3, or 5
** Parallel port DMA select 1 (LPT2) or 3 (LPT1)

See also other documents in the category Intel Hardware: