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A-2 System I/O Addresses/Memory Map/PCI Configuration and Device
Map/Interrupts/Video Mode Assignments
This appendix provides system I/O addresses, memory mapping, PCI
configuration and device mapping, interrupts, and video modes that are factory
assigned for this system. Use these values for reference when installing an
optional device.
System I/O Addresses
Table A-1 shows the I/O address space location of all directly I/O-accessible
registers. In Table A-1 the addresses are listed in hexadecimal notation.
Table A-1. System I/O Addresses
I/O Address Resource I/O Address Resource
0000 – 001F DMA controller 0170 – 0177 Secondary IDE controller
0020 – 0021 Interrupt controller 1 01F0 – 01F7 Primary IDE controller
0022 – 0040 Unused/reserved 0278 – 027F Parallel port 2 (relocatable)
0040 – 005F Programmable timer 02E8 – 02EF Serial port 4 (relocatable)
0060 & 0064 Keyboard controller 02F8 – 02FF Serial port 2 (relocatable)
0061 NMI status & control register 0370 – 0377 Secondary diskette
0070 NMI mask bit and RTC index address 0378 – 037F Parallel port 1 (relocatable)
0071 RTC 03BC – 03BF Parallel port 3
0072 RTC extended index register 03E8 – 03EF Serial port 2 (relocatable)
0073 RTC extended data register 03F8 – 03FF Serial port 1 (relocatable)
0080 – 008F DMA low page register 0CF8 PCI config address register
0092 Port 92 register 0CFC PCI data address register
00A0 – 00A1 Interrupt controller 2 0CF9 Reset control
00B2 Advanced pwr management control 04D0 – 04D1 INTC edge/level register
00B3 Advanced power management status 0C00 – 0C7F Pwr management base address
00C0-00DF DMA controller 0CA8 – 0CAF SMIC decoder
00F0 Coprocessor error 0CC0 – 0CCF SM base address