Nova Natural NOVA-7820 VIA C3 Processor CPU Embedded Board Benutzerhandbuch

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Appendix C Address Mapping

IO Address Map

I/O address Range

Description

000-01F

DMA Controller #1

020-021

Interrupt Controller #1, Master

02E-02F Super

I/O

040-05F 8254

timer

04E-04F Super

I/O

060-06F

8042 (Keyboard Controller)

070-07F

Real time Clock, NMI Mask

080-09F

DMA Page Register

0A0-0BF

Interrupt Controller #2

0C0-0DF

DMA Controller #2

0F0

Clear Math Coprocessor Busy

0F1

Reset Math Coprocessor

0F2

Core logic programming configuration

0F8-0FF Math

Coprocessor

1F0-1F8 Fixed

Disk

295-296 Hardware

Monitor

2E8-2EF

Serial Port 4

2F8-2FF

Serial Port 2

300-31F Prototype

Card

360-36F Reserved
378-37F

Parallel Printer Port 1 (LPT2)

3B0-3BF

Monochrome Display and Printer Adapter

(LPT1)

3C0-3CF Reserved

3D0-3DF

Color/Graphics Monitor Adapter

3E8-3EF

Serial Port 3

3F0-3F7 Diskette

Controller

3F8-3FF

Serial Port 1

1st MB Memory Address Map

Memory address

Description

00000-9FFFF System

memory

A0000-BFFFF VGA

buffer

C0000-C7FFF VGA

BIOS

F0000-FFFFF System

BIOS

1000000- Extend

BIOS