Intel AP440FX specifications I/O Map, Address hex Size Description

AP440FX Motherboard Technical Product Specification

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 -	03B0 - 03BB	12 bytes	S3 Virge or Virge/DX
			Reset IRQ
0061		1 byte	PIIX3 - NMI, speaker control	03BC - 03BF	4 bytes	Parallel Port 3
0064		1 byte	Kbd Controller, CMD/STAT	03C0 - 03DF	32 bytes	S3 Virge or Virge/DX
			Byte
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,	03F0 - 03F5	6 bytes	Floppy Channel 1
			Address
0071		1 byte	PIIX3 - Real Time Clock,	03F6	1 byte	Pri IDE Chan Cmd Port
			Data
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	7 bits	Pri IDE Chan Status Port
				6:0
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	LPT + 400h	8 bytes	ECP port, LPT + 400h
			Compatible I/O Registers
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	0CFC-0CFF	4 bytes	PCI Config Data Reg
			Mode
290 - 0297		8 bytes	Management Extension	0FE0-0FE7	8 bytes	CS4236 Audio
			Hardware
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.

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