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
6.3.
I/O Map
Hex Range
20h – 21h
24h – 25h
28h – 29h
2Ch – 2Dh
02E-02F
30h – 31h
34h – 35h
38h – 39h
3Ch – 3Dh
040
42h – 43h
4Eh – 4Fh
50h
System Resources
Address Range (hex)
FFE00000 – FFFFFFFF
FEE00000 – FEEFFFFF
FEC00000 – FECFFFFF
F00000 – FFFFFF
100000 - EFFFFF
00000 – FFFFFF
Data Width
8-bits
8-bits
8-bits
8-bits
16-bits
16-bits
16-bits
Device
Interrupt Controller
Interrupt Controller
Interrupt Controller
Interrupt Controller
LPC/eSPI
Interrupt Controller
Interrupt Controller
Interrupt Controller
Interrupt Controller
Timer/Counter
Timer/Counter
LPC/eSPI
Timer/Counter
Size
Description
2 MB
High BIOS Area
1 MB
MSI Interrupts
1 MB
APIC Configuration Space
1 MB
ISA Hole
14 MB
Main Memory
1 MB
DOS Compatibility Memory
System Resource
Generic
Generic
Generic
Generic
Reserved - cascade channel
Generic
Generic
Generic
Express-KL
41
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