6 System Resources
6.1 System Memory Map
Address Range (decimal)
(4GB-2MB)
(4GB-18MB) – (4GB-17MB-1)
(4GB-20MB) – (4GB-19MB-1)
15MB – 16MB
1MB -15MB
0K –1MB
6.2 Direct Memory Access Channels
Channel Number
0
1
2
3
4
5
6
7
Express-HLE
Address Range (hex)
FFE00000 – FFFFFFFF
FEE00000 – FEEFFFFF
FEC00000 – FECFFFFF
F00000 – FFFFFF
100000 - EFFFFF
00000 – FFFFFF
Data Width
System Resource
8-bits
Generic
8-bits
Generic
8-bits
Generic
8-bits
Generic
Reserved - cascade channel
16-bits
Generic
16-bits
Generic
16-bits
Generic
Size
Description
2 MB
High BIOS Area
1 MB
MSI Interrupts
1 MB
APIC Configuration Space
1 MB
ISA Hole
14MB
Main Memory
1MB
DOS Compatibility Memory
Page 43
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