Advantek Networks (USB 2.0) Manual de usuario descargar pdf (Pagina 107)

97 Appendix C

C.2 1st MB memory map

C.3 DMA channel assignments

MPU-401 select from 300 ~ 330H (2 bytes)

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)

Table C.1: System I/O Ports

Addr. range (Hex) Device

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 117 118

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Advantek Networks (USB 2.0) Manual de usuario Pagina 107