7.4. Ports

Адреса Размер Назначение
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 0-6, 7 bits PIIX4 - real time clock, address
0071 1 byte PIIX4 - real time clock, data
0078 1 byte Reserved - system board configuration
0079 1 byte Reserved - system board 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
0200 - 0207 8 bytes Audio/game port
0220 - 022F 16 bytes Audio (Sound Blaster compatible)
0240 - 024F 16 bytes Audio (Sound Blaster compatible)
0278 - 027F 8 bytes LPT2
0290 - 0297 8 bytes Hardware monitor
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 0-6, 7 bits Secondary IDE channel status port
0378 - 037F 8 bytes LPT1
0388 - 038D 6 bytes AdLib (FM synthesizer)
03B4 - 03B5 2 bytes Video (VGA)
03BA 1 byte Video (VGA)
03BC - 03BF 4 bytes LPT3
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 0-6, 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
LPTn + 400h 8 bytes ECP port, LPTn 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
0FF0 - 0FF7 8 bytes CS4236B audio control
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
007C bits 4-5, 2 bits Chassis fan RPM sense selection
* DWORD access only
** Byte access only