I/O Map - Intel AL440LX Product Manual

Technical Reference

I/O Map

Table 33.

I/O Map

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