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System Resources 61

AmITX-IB-I

Appendix B - System Resources

B.1 System Memory Map

Table B-1: System Memory Map

B.2 Direct Memory Access Channels

Table B-2: Direct Memory Access Channels

Address Range

(decimal)

Address Range

(hex)

Size Description

(4GB-2MB)

FFE00000 –

FFFFFFFF

2 MB High BIOS Area

(4GB-18MB) –

(4GB-17MB-1)

FEE00000 –

FEEFFFFF

1 MB FSB Interrupt Memory Space

(4GB-20MB) –

(4GB-19MB-1)

FEC00000 –

FECFFFFF

1 MB APIC Configuration Space

960 K – 1024 K F0000 – FFFFF 64 KB System BIOS Area

896 K – 960 K E0000 – EFFFF 64 KB Extended System BIOS Area

768 K – 896 K C0000 – DFFFF 128 KB PCI expansion ROM area

640 K – 768 K A0000 – BFFFF 128 KB Video Buffer & SMM space

0 K – 640 K 00000 – 9FFFF 640 KB DOS Area

Channel Number Data Width System Resource

0– Open

1– Open

2– Open

3 – Open

4 – DMA Controller

5– Open

6– Open

7– Open

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 81 82

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