Intel VS440FX Technical Specification page 41

Table 10. I/O Map (continued)
Address (hex) Size
03D4 - 03D5 2 bytes
03DA 1 byte
03E8 - 03EF 8 bytes
03F0 - 03F5 6 bytes
03F6 1 byte
03F7 (Write) 1 byte
03F7, bit 7 1 bit
03F7, bits 6:0 7 bits
03F8 - 03FF 8 bytes
04D0 - 04D1 2 bytes
0534 - 0537 4 bytes
LPT n + 400h 8 bytes
0CF8 - 0CFB* 4 bytes
0CF9** 1 byte
0CFC - 0CFF 4 bytes
0FF0 - 0FF7 4 bytes
FF00 - FF07 8 bytes
FFA0 - FFA7 8 bytes
FFA8 - FFAF 8 bytes
* DWORD access only
** Byte access only
NOTE
Refer to the Audio section in Chapter 1 for specific I/O addresses that can be used by the audio
components on your motherboard. This table does not list I/O addresses that may be used by add-
in cards in the system.
Description
Video (VGA)
Video (VGA)
COM3
Floppy Channel 1
Primary IDE Channel Command Port
Floppy Channel 1 Command
Floppy Disk Change Channel 1
Primary IDE Channel Status Port
COM1
Edge/level triggered PIC
WSS Audio
ECP port, LPT n base address + 400h
PCI Configuration Address Register
Turbo and Reset Control Register
PCI Configuration Data Register
CS4236 Audio Control
IDE Bus Master Register
Primary Bus Master IDE Registers
Secondary Bus Master IDE Registers
Motherboard Resources
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