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AP440FX Motherboard Technical Product Specification
42
2.2 I/O Map
Table 29. I/O Map
Address
(hex) Size Description
Address
(hex) Size Description
0000 - 000F 16 bytes PIIX3 - DMA 1 0376 1 byte Sec IDE Chan Cmd Port
0020 - 0021 2 bytes PIIX3 - Interrupt Controller 1 0377 1 byte Sec IDE Chan Stat Port
002E - 002F 2 bytes 87307 Base Configuration 0378 - 037F 8 bytes Parallel Port 1
0040 - 0043 4 bytes PIIX3 - Timer 1 0388 - 038B 4 bytes CS4236 Audio
0060 1 byte Keyboard Controller Byte -
Reset IRQ
03B0 - 03BB 12 bytes S3 Virge or Virge/DX
0061 1 byte PIIX3 - NMI, speaker control 03BC - 03BF 4 bytes Parallel Port 3
0064 1 byte Kbd Controller, CMD/STAT
Byte
03C0 - 03DF 32 bytes S3 Virge or Virge/DX
0070, bit 7 1 bit PIIX3 - Enable NMI 03E8 - 03EF 8 bytes Serial Port 3
0070, bits 6:0 7 bits PIIX3 - Real Time Clock,
Address
03F0 - 03F5 6 bytes Floppy Channel 1
0071 1 byte PIIX3 - Real Time Clock,
Data
03F6 1 byte Pri IDE Chan Cmd Port
0078 1 byte Reserved - Brd. Config. 03F7 (Write) 1 byte Floppy Chan 1 Cmd
0079 1 byte Reserved - Brd. Config. 03F7, bit 7 1 bit Floppy Disk Chg Chan 1
0080 - 008F 16 bytes PIIX3 - DMA Page Register 03F7, bits
6:0
7 bits Pri IDE Chan Status Port
00A0 - 00A1 2 bytes PIIX3 - Interrupt Controller 2 03F8 - 03FF 8 bytes Onboard Serial Port 1
00C0 - 00DE 31 bytes PIIX3 - DMA 2 04D0 - 04D1 2 bytes Edge/level triggered
00F0-00FF 16 bytes Math Coprocessor
Compatible I/O Registers
LPT + 400h 8 bytes ECP port, LPT + 400h
0170 - 0177 8 bytes Secondary IDE Channel 0608 - 060B* 4 bytes CS4236 Audio
01F0 - 01F7 8 bytes Primary IDE Channel 0CF8** 1 byte PCI Config Address Reg.
0200 - 0207 8 bytes Game Port 0CF9 1 byte Turbo & Reset control
Reg.
0228 - 022F 8 bytes Parallel Port 3, ECP/EPP
Mode
0CFC-0CFF 4 bytes PCI Config Data Reg
290 - 0297 8 bytes Management Extension
Hardware
0FE0-0FE7 8 bytes CS4236 Audio
0240-024F 16 bytes CS4236 Audio FF00 - FF07 8 bytes IDE Bus Master Reg.
0278 - 027B 4 bytes Parallel Port 2 FF80 - FF9F 32 bytes PCI Universal Serial Bus
02E8-02EF 8 bytes Serial Port 4 FFA0 - FFA7 8 bytes IDE primary Channel
02F8 - 02FF 8 bytes Onboard Serial Port 2 FFA8 - FFAF 8 bytes IDE secondary channel
0330 - 0331 2 bytes MPU-401 (MIDI)
* This is only part of one of the Windows Sound System (WSS) selectable ranges. The defined ranges are 0530-0537, 0604-
060B, 0E80-0E87, or 0F40-0F47. Only one of these ranges needs to be used for WSS to work.
** Only by DWORD accesses.