8 system resources, 1 system memory map, 2 i/o map – ADLINK ETX-BT User Manual

Page 43: System resources

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Page 43

8 System Resources

8.1 System Memory Map

Address Range (decimal)

Address Range (hex)

Size

Description

Start 128KB below 1MB

000E0000h-000FFFFFh

Low BIOS

Starts 20MB below 4GB

FEC00000h-FEC0040h

IO APIC

Start 19MB below 4GB

FED00000h-FED003FFh

HPET

Start 64 KB below 4GB

FFFF0000h-FFFFFFFFh

High

BIOS

0K –1MB

1MB

DOS DRAM

8.2 I/O Map

Hex Range

Device

20h-21h, 24h-25h, 28h-29h, 2Ch-2Dh,
30h-31h, 34h-5h, 38h-39h, 3Ch-3Dh

8259 Master

40h-43h, 50h-53h

8254s

60h, 64h

PS2 Control

61h, 63h, 65h, 67h

NMI Controller

70h-77h RTC

80h-83h Port

80h

92h Init

Register

A0h-A1h, A4h-A5h, A8h-A9h, ACh-ADh,
B0h-B1h,B4h-B5h, B8h-B9h, BCh-BDh,
4D0h-4D1h

8259 Slave

2E8h-2FFh

COM2

3F8h-3FFh

COM1

B2h-B3h

Active Power Management

400h

PM Base address

500h

GPIO Base address

E000

SMBus base address for SB

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