Intel AL440LX User Manual

Technical Reference
50
I/O Map
Table 33. I/O Map
Address (hex) Size Description
0000 - 000F 16 bytes PIIX4- DMA 1
0020 - 0021 2 bytes PIIX4 - interrupt controller 1
002E - 002F 2 bytes Super I/O controller configuration registers
0040 - 0043 4 bytes PIIX4 - Counter/Timer 1
0048 - 004B 4 bytes PIIX4- Counter/Timer 2
0060 1 byte Keyboard Controller Byte - Reset IRQ
0061 1 byte PIIX4 - NMI, Speaker Control
0064 1 byte Keyboard controller, CMD/STAT Byte
0070, bit 7 1 bit PIIX4 - enable NMI
0070, bits 6:0 7 bits PIIX4 - real time clock, address
0071 1 byte PIIX4 - real time clock, data
0078 1 byte Reserved - motherboard configuration
0079 1 byte Reserved - motherboard configuration
0080 - 008F 16 bytes PIIX4 - DMA page registers
00A0 - 00A1 2 bytes PIIX4 - interrupt controller 2
00B2 - 00B3 2 bytes APM control
00C0 - 00DE 31 bytes PIIX4 - DMA 2
00F0 1 byte Reset numeric error
0170 - 0177 8 bytes Secondary IDE channel
01F0 - 01F7 8 bytes Primary IDE channel
0201 1 byte Audio / game port
0220 - 022F 16 bytes Audio (Sound Blaster
†
compatible)
0228 - 022F 8 bytes LPT3
0240 - 024F 16 bytes Audio (Sound Blaster compatible)
0278 - 027F 8 bytes LPT2
0290 - 0297 8 bytes Management extension hardware
02E8 - 02EF 8 bytes COM4/Video (8514A)
02F8 - 02FF 8 bytes COM2
0300 - 0301 2 bytes MPU-401 (MIDI)
0330 - 0331 2 bytes MPU-401 (MIDI)
0332 - 0333 2 bytes MPU-401 (MIDI)
0334 - 0335 2 bytes MPU-401 (MIDI)
0376 1 byte Secondary IDE channel command port
0377 1 byte Floppy channel 2 command
0377, bit 7 1 bit Floppy disk change, channel 2
0377, bits 6:0 7 bits Secondary IDE channel status port
continued ☛

Intel AL440LX Specifications

General

Brand	Intel
Model	AL440LX
Category	Motherboard
Language	English