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MB991AF
User’s Manual
A.
I/O Port 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 lists the
I/O port addresses used.
Address
Device Description
0x00000A00-0x00000A0F
Motherboard resources
0x00000A10-0x00000A1F
Motherboard resources
0x00000A20-0x00000A2F
Motherboard resources
0x0000002E-0x0000002F
Motherboard resources
0x0000004E-0x0000004F
Motherboard resources
0x00000061-0x00000061
Motherboard resources
0x00000063-0x00000063
Motherboard resources
0x00000065-0x00000065
Motherboard resources
0x00000067-0x00000067
Motherboard resources
0x00000070-0x00000070
Motherboard resources
0x00000070-0x00000070
System CMOS / real time clock
0x00000080-0x00000080
Motherboard resources
0x00000092-0x00000092
Motherboard resources
0x000000B2-0x000000B3
Motherboard resources
0x00000680-0x0000069F
Motherboard resources
0x0000FFFF-0x0000FFFF
Motherboard resources
0x0000FFFF-0x0000FFFF
Motherboard resources
0x0000FFFF-0x0000FFFF
Motherboard resources
0x00001800-0x000018FE
Motherboard resources
0x0000164E-0x0000164F
Motherboard resources
0x00000020-0x00000021
Programmable interrupt controller
0x00000024-0x00000025
Programmable interrupt controller
0x00000028-0x00000029
Programmable interrupt controller
0x0000002C-0x0000002D
Programmable interrupt controller