Chapter 3

Hardware

Table 3-1. Memory Map (continued)

Address

Size

Use

0400 0000

1MB

RAM or Unused if Framebuffer is set to 1MB or more

03F0 0000

1MB

RAM or Unused if Framebuffer is set to 2MB or more

 

 

 

 

 

 

 

03E0 0000

1MB

RAM or Unused if Framebuffer is set to 3MB or more

 

 

 

 

 

 

 

 

03D0 0000

1MB

RAM or Unused if Framebuffer is set to 4MB

 

03C0 0000

44MB

RAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Use

 

 

 

Address

Size

 

 

Memory hole size selected

 

 

 

8MB

 

4MB

 

2MB

 

1MB

 

0MB

0100 0000

1MB

H

 

H

 

H

 

H

 

R

 

 

 

 

 

 

 

 

 

 

 

00F0 0000

1MB

H

 

H

 

H

 

R

 

R

00E0 0000

1MB

H

 

H

 

R

 

R

 

R

 

 

 

 

 

 

 

 

 

 

 

00D0 0000

1MB

H

 

H

 

R

 

R

 

R

 

 

 

 

 

 

 

 

 

 

 

00C0 0000

1MB

H

 

R

 

R

 

R

 

R

00B0 0000

1MB

H

 

R

 

R

 

R

 

R

 

 

 

 

 

 

 

 

 

 

 

00A0 0000

1MB

H

 

R

 

R

 

R

 

R

 

 

 

 

 

 

 

 

 

 

 

0090 0000

1MB

H

 

R

 

R

 

R

 

R

 

 

R = RAM

 

 

 

 

 

 

 

 

 

H = Memory Hole, forwarded to ISA

 

 

 

 

 

The board can be configured to have access to the 1MB

 

 

Flash anywhere in the memory hole, on 1MB alignment.

0080 0000

7MB

RAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0010 0000

128kB

Shadowed BIOS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

000E 0000

8kB

Unused

 

 

 

 

 

 

 

 

 

 

 

000D E000

8kB

DiskOnChip, if DC000-DDFFF window selected.

 

 

 

Unused if no DOC present.

 

 

 

 

 

000D C000

56kB

Unused

 

 

 

 

 

 

 

000C E000

8kB

DiskOnChip, if CC000-CDFFF window selected.

 

 

 

Unused if no DOC present.

 

 

 

 

 

000C C000

48kB

Unused

 

 

 

 

 

 

 

 

 

 

 

 

 

000C 0000

128kB

Unused, reserved for Video RAM, or

 

 

 

 

 

in SMI mode, mapped to RAM

 

 

 

000A 0000 -

640kB

Base memory

 

 

 

 

 

 

 

0000 0000

 

 

 

 

 

 

 

 

 

 

CoreModule 420

Reference Manual

19

Page 25
Image 25
Ampro Corporation 5001692A manual Use Address Size Memory hole size selected