Appendix A: Technical Specifications

Memory Map

Address

Address

 

 

Range

Range

Size

Description

Decimal

Hexadecimal

 

 

960K-1M

0F0000-

64 KB

Upper BIOS

0FFFFF

 

 

 

896K-960K

0E0000-

64 KB

Lower BIOS

0EFFFF

 

 

 

 

0C0000-

 

Expansion

768K-896K

128 KB

Card BIOS

0DFFFF

 

 

and Buffer

 

 

 

 

 

 

Standard

640K-768K

0A0000-

128 KB

PCI/ISA

0BFFFF

Video

 

 

 

 

 

Memory

 

080000-

 

Ext.

512K-640K

128 KB

Conventional

09FFFF

 

 

memory

 

 

 

0K- 512K

000000-

512 KB

Conventional

07FFFF

memory

 

 

DMA Channels

DMA #

Data Width

System Resource

0

8- or 16-bits

 

1

8- or 16-bits

Parallel port (for ECP)

2

8- or 16-bits

Floppy Drive

3

8- or 16-bits

Parallel port (for ECP)

4

Reserved-

cascade channel

5

16-bits

Open

6

16-bits

Open

7

16-bits

Open

43

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Image 53
Intel Raptor AT Memory Map, DMA Channels, Address Range Size Description Decimal Hexadecimal, Data Width System Resource