AL440LX Motherboard Product Guide
51
Table 33. I/O Map
(continued)
Address (hex) Size Description
0378 - 037F 8 bytes LPT1
0388- 038D 6 bytes AdLib (FM synthesizer)
03B4 - 03B5 2 bytes Video (VGA
†
)
03BA 1 byte Video (VGA)
03C0 - 03CA 11 bytes Video (VGA)
03CC 1 byte Video (VGA)
03CE - 03CF 2 bytes Video (VGA)
03D4 - 03D5 2 bytes Video (VGA)
03DA 1 byte Video (VGA)
03E8 - 03EF 8 bytes COM3
03F0 - 03F5 6 bytes Floppy Channel 1
03F6 1 byte 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 COM1
04D0 - 04D1 2 bytes Edge/level triggered PIC
0530 - 0537 8 bytes Windows Sound System
0604 - 060B 8 bytes Windows Sound System
LPT
n
+ 400h 8 bytes ECP port, LPT
n
base address + 400h
0CF8 - 0CFB* 4 bytes PCI configuration address register
0CF9** 1 byte Turbo and reset control register
0CFC - 0CFF 4 bytes PCI configuration data register
0E80 - 0E87 8 bytes Windows Sound System
0F40- 0F47 8 bytes Windows Sound System
0F86 - 0F87 2 bytes Yamaha OPL3-SA configuration
FF00 - FF07 8 bytes IDE bus master register
FFA0 - FFA7 8 bytes Primary bus master IDE registers
FFA8 - FFAF 8 bytes Secondary bus master IDE registers
* DWORD access only
** Byte access only
✏
NOTE
This table does not list I/O addresses that may be used by add-in cards in the system.
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