Motherboard resources – Intel Vig390s User Manual

Page 114

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Vig390s Motherboard Manual V1.0

113

Motherboard Resources

Table 80: Typical Memory Map

Address Range
(decimal)

Address Range (hex) Size

Description

1024 K - 393216 K

100000 - 18000000

383 MB Extended memory

928 K - 1024 K

E8000 - FFFFF

96 KB

System BIOS

896 K - 928 K

E0000 - E7FFF

32 KB

System BIOS (Available as UMB)

800 - 896 K

C8000 - DFFFF

96 KB

Available high DOS memory (open
to ISA and PCI bus)

640 K - 800 K

A0000 - C7FFF

160 KB

Video memory and BIOS

0 K - 512 K

00000 - 7FFFF

512 KB

Conventional memory

Table 81: DMA Channels

DMA Channel Number Data Width System Resource
0

8- or 16-bits Open

1

8- or 16-bits Parallel port

2

8- or 16-bits Floppy drive

3

8- or 16-bits Parallel port (for ECP)/audio

4

8- or 16-bits Reserved - cascade channel

5 16-bits

Open

6 16-bits

Open

7 16-bits

Open

Table 82: I/O Map

Address (hex)

Size

Description

0000 - 000F

16 bytes

DMA 1 controller 1

0020 - 0021

2 bytes

Interrupt controller 1

002E - 002F

2 bytes

Super I/O controller configuration registers

0040 - 0043

4 bytes

Counter/Timer 1

0048 - 004B

4 bytes

Counter/Timer 2

0060

1 byte

Keyboard Controller Byte

0061

1 byte

NMI, Speaker Control

0064

1 byte

Keyboard controller

0070 - 0071

2 bit

Real time clock controller

0080 - 008F

16 bytes

DMA page registers

00A0 - 00A1

2 bytes

Interrupt controller 2

00B2 - 00B3

2 bytes

APM control

00C0 - 00DE

31 bytes

DMA 2

00F0 - 00FF

16 byte

Numeric processor

0170 - 0177

8 bytes

Secondary IDE controller

01F0 - 01F7

8 bytes

Primary IDE controller

0200 - 0207

8 bytes

Audio/ game port/ joystick

0220 - 022F

16 bytes

Audio (Sound Blaster compatible)

o228 - 022F

8 bytes

LPT3

0278 - 027F

8 bytes

LPT2

02E8 - 02EF

8 bytes

COM4/Video (8514A)

02F8 - 02FF

8 bytes

COM2

0330 - 0331

2 bytes

MPU-401 (MIDI)

0376 - 0377

2 byte

Secondary IDE channel command port

0120 - 0127

8 byte

Audio controller

0274 - 0277

4 bit

I/O read data port for ISA Plug and Play
enumerator

0378 - 037F

8 bytes

LPT1

0388 - 038D

6 bytes

AdLib (FM synthesizer)

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