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6–14 Maintenance and Service Guide
Specifications
Table 6-12
System I/O Addresses
I/O Address (hex) System Function (shipping configuration)
000 - 00F DMA controller no. 1
010 - 01F unused
020 - 021 Interrupt controller no. 1
022 - 024 Opti chipset configuration registers
025 - 03F unused
02E - 02F 87334 “Super IO” configuration for CPU
040 - 05F Counter/timer registers
044 - 05F unused
060 Keyboard controller
061 Port b
062 - 063 unused
064 Keyboard controller
065 - 06F unused
070 - 071 NMI enable/real time clock
072 - 07F unused
080 - 08F DMA page registers
090 - 091 unused
092 Port A
093 - 09F unused
0A0 - 0A1 Interrupt controller no. 2
238850-003.book Page 14 Friday, December 21, 2001 2:53 PM