Specifications

INTEL OEM PRODUCTS AND SERVICES DIVISION PRELIMINARY - REV 0.1
Classic/PCI i486 Baby-AT Motherboard Technical Product Summary
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18
APPENDIX F
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I/O MAP
Address Range (hex) Size (Decimal) Description
0000 - 000F
16 bytes
SIO - DMA 1
0020 - 0021 2 bytes SIO - Interrupt Controller 1
0040 - 0043 4 bytes SIO - Timer 1
0048 - 004B 4 bytes SIO - Timer 2
0060 1 byte Keyboard Controller Data Byte
0061 1 byte SIO - NMI, speaker control
0064 1 byte Keyboard Controller, CMD & STATUS Byte
0070, bit 7 1 bit SIO - Enable NMI
0070, bits 6:0 7 bits SIO - Real Time Clock, Address
0071 1 byte SIO - Real Time Clock, Data
0073 1 byte Reserved - Board Configuration
0075 1 byte Reserved - Board Configuration
0078 1 byte SIO - BIOS Timer
0080 - 008F 16 bytes SIO - DMA Page Register
00A0 - 00A1 2 bytes SIO - Interrupt Controller 2
00C0 - 00DE 31 bytes SIO - DMA 2
00F0 1 bytes Reset Numeric Error
0170 - 0177 8 bytes Secondary IDE Channel
01F0 - 01F7 8 bytes Primary IDE Channel
0278 - 027B 4 bytes Parallel Port 2
02F8 - 02FF 8 bytes On-Board Serial Port 2
0376 1 byte Secondary IDE Channel Command Port
0377 1 byte Secondary IDE Channel Status Port
0378 - 037F 8 bytes Parallel Port 1
03BC - 03BF 4 bytes Parallel Port x
03E8 - 03EF 8 bytes Serial Port 3
03F0 - 03F5 6 bytes Floppy Channel 1
03F6 1 bytes Primary IDE Channel Command Port
03F7 (Write) 1 byte Floppy Channel 1 Command
03F7, bit 7 1 bit Floppy Disk Change Channel 1
03F7, bits 6:0 7 bits Primary IDE Channel Status Port
03F8 - 03FF 8 bytes On-Board Serial Port 1
0CF8 1 byte PCI Configuration Space Enable
0CF9 1 byte De-turbo Mode Enable
C000 - C0FF 256 bytes 82424TX Configuration Registers
C200 - C2FF 256 bytes 82378IB Configuration Registers
Table F-1. Classic/PCI i486 Baby-AT I/O Address Map