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APPENDIX A. ADDRESS MAPPING
IO ADDRESS MAP
Each peripheral device in the system is assigned a set of I/O port addresses which also becomes the
identity of the device. The following table list the I/O addresses used.
I/O MAP
ASSIGNMENT
0000 - 000F
Direct Memory Access contrlooer
0020 - 0021
Programmable interrupt controller
0040 - 0043
System timer
0060 - 0060
Standard 101/102 – key or Microsoft Natural Kayboard
0061 - 0061
System speaker
0070 - 0073
System CMOS/real time clock
00F0 - 00FF
Numeric data processor
0170 – 0177
Intel® 82801DB Ultra ATA Storage Controller-24CB
0170 – 0177
Secondary IDE Channel (dual fifo)
01F0 – 01F7
Intel® 82801DB Ultra ATA Storage Controller-24CB
01F0 – 01F7
Primary IDE Channel (dual fifo)
02F8 - 02FF
Communication Port (COM2)
0378 - 037F
Print Port
0382 - 03BB
ATI MOBILITY RADEON 9000
03F8 - 03FF
Communication Port (COM1)
C000 - CFFF
Intel ® 82852/82855GM/GME/PM/GMV Processor to
AGP controller - 3581
D000 - D03F
Intel ® PRO/100 VE Network Connection
E800 - E81F
Intel® 82801DB/DBM USB Universal Host Controller
EB00 – EB3F
Realtek AC’97 Audio
MEMORY MAP
MEMORY MAP
ASSIGNMENT
00000000-0009FFFF
System board extension for ACPI BIOS
000A0000-000AFFFF
ATI MOBILITY RADEON 9000
000D0000-000D7FFF
Unavailable for use by devices
D8000000-DFFFFFFF
Intel ® 82852/82855GM/GME/PM/GMV to Processor
I/O controller - 3580
E0000000-E7FFFFFF
Intel ® 82852/82855GM/GME/PM/GMV Processor to
AGP controller - 3581
E8100000-E8100FFF Intel ® PRO/100 VE Network Connection
E8100000-E81FFFFF Intel® 82801DB PCI Bridge – 224E
E8200000-E82003FF
Intel USB 2.0 Enhanced Host Controller
E8201000-E82011FF
Realtek AC’97 Audio
Summary of Contents for AR-B1891
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