PC机I/O端口分配列表

　　这个学期上微机接口课，感觉还挺有意思的，今天下午心血来潮找来一份IO端口地址分配的列表（From : http://www.stanislavs.org/helppc/ports.html ）。若是有空的话，我会陆续针对每个端口写一段小程序学习一下或者注释一下其初始化Routine，算是记录下自己的学习历程，也方便自己以后查阅复习。

       Port addresses are not always constant across PC, AT and PS/2
       Unless marked, port addresses are relative to PC and XT only

       000-00F  8237 DMA controller
       000 Channel 0 address register
       001 Channel 0 word count
       002 Channel 1 address register
       003 Channel 1 word count
       004 Channel 2 address register
       005 Channel 2 word count
       006 Channel 3 address register
       007 Channel 3 word count
       008 Status/command register
       009 Request register
       00A Mask register
       00B Mode register
       00C Clear MSB/LSB flip flop
       00D Master clear temp register
       00E Clear mask register
       00F Multiple mask register

       010-01F  8237 DMA Controller (PS/2 model 60 & 80), reserved (AT)

 

       020-02F  8259A Master Programmable Interrupt Controller
       020 8259 Command port  (see 8259)
       021 8259 Interrupt mask register  (see 8259)

       030-03F  8259A Slave Programmable Interrupt Controller (AT,PS/2)

 

       040-05F  8253 or 8254 Programmable Interval Timer (PIT, see 8253)
       040 8253 channel 0, counter divisor
       041 8253 channel 1, RAM refresh counter
       042 8253 channel 2, Cassette and speaker functions
       043 8253 mode control  (see 8253)
       044 8254 PS/2 extended timer
       047 8254 Channel 3 control byte

      060-067  8255 Programmable Peripheral Interface  (PC,XT, PCjr)
       060 8255 Port A keyboard input/output buffer (output PCjr)
       061 8255 Port B output
       062 8255 Port C input
       063 8255 Command/Mode control register

       060-06F  8042 Keyboard Controller  (AT,PS/2)
       060 8042 Keyboard input/output buffer register
       061 8042 system control port (for compatability with 8255)
       064 8042 Keyboard command/status register

       070 CMOS RAM/RTC, also NMI enable/disable (AT,PS/2, see RTC)
       071 CMOS RAM data  (AT,PS/2)

       080 Manufacturer systems checkpoint port (used during POST)
      080-090  DMA Page Registers
       081 High order 4 bits of DMA channel 2 address
       082 High order 4 bits of DMA channel 3 address
       083 High order 4 bits of DMA channel 1 address

      090-097  POS/Programmable Option Select  (PS/2)
       090 Central arbitration control Port
       091 Card selection feedback
       092 System control and status register
       094 System board enable/setup register
       095 Reserved
       096 Adapter enable/setup register
       097 Reserved

       0A0 NMI Mask Register (PC,XT) (write 80h to enable NMI, 00h disable)
       0A0-0BF  Second 8259 Programmable Interrupt Controller (AT, PS/2)
       0A0 Second 8259 Command port  (see 8259)
       0A1 Second 8259 Interrupt mask register  (see 8259)

       0C0 TI SN76496 Programmable Tone/Noise Generator (PCjr)
      0C0-0DF  8237 DMA controller 2 (AT)
       0C2 DMA channel 3 selector  (see ports 6 & 82)

       0E0-0EF  Reserved

       0F0-0FF  Math coprocessor (AT, PS/2)
       0F0-0F5  PCjr Disk Controller
       0F0 Disk Controller
       0F2 Disk Controller control port
       0F4 Disk Controller status register
       0F5 Disk Controller data port

       0F8-0FF  Reserved for future microprocessor extensions

 

       100-10F  POS Programmable Option Select (PS/2)
       100 POS Register 0, Adapter ID byte (LSB)
       101 POS Register 1, Adapter ID byte (MSB)
       102 POS Register 2, Option select data byte 1
           Bit 0 is card enable (CDEN)
       103 POS Register 3, Option select data byte 2
       104 POS Register 4, Option select data byte 3
       105 POS Register 5, Option select data byte 4
           Bit 7 is (-CHCK)
           Bit 6 is reserved
       106 POS Register 6, subaddress extension (LSB)
       107 POS Register 7, subaddress extension (MSB)

       110-1EF  System I/O channel

 

       170-17F  Fixed disk 1 (AT)
       170 disk 1 data
       171 disk 1 error
       172 disk 1 sector count
       173 disk 1 sector number
       174 disk 1 cylinder low
       175 disk 1 cylinder high
       176 disk 1 drive/head
       177 disk 1 status

       1F0-1FF  Fixed disk 0 (AT)
       1F0 disk 0 data
       1F1 disk 0 error
       1F2 disk 0 sector count
       1F3 disk 0 sector number
       1F4 disk 0 cylinder low
       1F5 disk 0 cylinder high
       1F6 disk 0 drive/head
       1F7 disk 0 status

       200-20F  Game Adapter (see GAME PORT or JOYSTICK)

 

       210-217  Expansion Card Ports (XT)
       210 Write: latch expansion bus data
           read:  verify expansion bus data
       211 Write: clear wait,test latch
           Read:  MSB of data address
       212 Read:  LSB of data address
       213 Write: 0=enable, 1=/disable expansion unit
       214-215  Receiver Card Ports
       214 write: latch data, read: data
       215 read:  MSB of address, next read: LSB of address

       21F Reserved

       220-26F  Reserved for I/O channel

 

       270-27F  Third parallel port (see PARALLEL PORT)
       278 data port
       279 status port
       27A control port

       280-2AF  Reserved for I/O channel

 

       2A2-2A3  MSM58321RS clock

 

       2B0-2DF  Alternate EGA, or 3270 PC video (XT, AT)

       2E0 Alternate EGA/VGA
       2E1 GPIB Adapter  (AT)

       2E2-2E3  Data acquisition adapter (AT)

 

       2E8-2EF  COM4 non PS/2 UART (Reserved by IBM) (see UART)

 

       2F0-2F7  Reserved

 

       2F8-2FF  COM2 Second Asynchronous Adapter (see UART)
                Primary Asynchronous Adapter for PCjr

       300-31F  Prototype Experimentation Card (except PCjr)
                Periscope hardware debugger
       320-32F  Hard Disk Controller  (XT)
       320 Read from/Write to controller
       321 Read: Controller Status, Write: controller reset
       322 Write: generate controller select pulse
       323 Write: Pattern to DMA and interrupt mask register
           (see ports 0F,21,C2)
       324 disk attention/status

      330-33F  Reserved for XT/370

 

      340-35F  Reserved for I/O channel

 

      360-36F  PC Network

 

      370-377  Floppy disk controller (except PCjr)
       372 Diskette digital output
       374 Diskette controller status
       375 Diskette controller data
       376 Diskette controller data
       377 Diskette digital input

       378-37F  Second Parallel Printer (see PARALLEL PORT)
                First Parallel Printer (see PARALLEL PORT)
       378 data port
       379 status port
       37A control port

       380-38F  Secondary Binary Synchronous Data Link Control (SDLC) adapter
       380 On board 8255 port A, internal/external sense
       381 On board 8255 port B, external modem interface
       382 On board 8255 port C, internal control and gating
       383 On board 8255 mode register
       384 On board 8253 channel square wave generator
       385 On board 8253 channel 1 inactivity time-out
       386 On board 8253 channel 2 inactivity time-out
       387 On board 8253 mode register
       388 On board 8273 read: status; Write: Command
       389 On board 8273 write: parameter; read: response
       38A On board 8273 transmit interrupt status
       38B On board 8273 receiver interrupt status
       38C On board 8273 data

       390-39F  Cluster Adapter

 

       3A0-3AF  Primary Binary Synchronous Data Link Control (SDLC) adapter
       3A0 On board 8255 port A, internal/external sense
       3A1 On board 8255 port B, external modem interface
       3A2 On board 8255 port C, internal control and gating
       3A3 On board 8255 mode register
       3A4 On board 8253 counter 0 unused
       3A5 On board 8253 counter 1 inactivity time-outs
       3A6 On board 8253 counter 2 inactivity time-outs
       3A7 On board 8253 mode register
       3A8 On board 8251 data
       3A9 On board 8251 command/mode/status register

      3B0-3BF Monochrome Display Adapter (write only, see 6845)
       3B0 port address decodes to 3B4
       3B1 port address decodes to 3B5
       3B2 port address decodes to 3B4
       3B3 port address decodes to 3B5
       3B4 6845 index register, selects which register [0-11h]
           is to be accessed through port 3B5
       3B5 6845 data register [0-11h] selected by port 3B4,
           registers 0C-0F may be read.  If a read occurs without
           the adapter installed, FFh is returned.  (see 6845)
       3B6 port address decodes to 3B4
       3B7 port address decodes to 3B5
       3B8 6845 Mode control register
       3B9 reserved for color select register on color adapter
       3BA status register (read only)
       3BB reserved for light pen strobe reset

       3BC-3BF  Primary Parallel Printer Adapter (see PARALLEL PORT)
       3BC parallel 1, data port
       3BD parallel 1, status port
       3BE parallel 1, control port

       3C0-3CF  EGA/VGA
       3C0 VGA attribute and sequencer register
       3C1 Other video attributes
       3C2 EGA, VGA, CGA input status 0
       3C3 Video subsystem enable
       3C4 CGA, EGA, VGA sequencer index
       3C5 CGA, EGA, VGA sequencer
       3C6 VGA video DAC PEL mask
       3C7 VGA video DAC state
       3C8 VGA video DAC PEL address
       3C9 VGA video DAC
       3CA VGA graphics 2 position
       3CC VGA graphics 1 position
       3CD VGA feature control
       3CE VGA graphics index
       3CF Other VGA graphics

       3D0-3DF Color Graphics Monitor Adapter (ports 3D0-3DB are write only, see 6845)
       3D0 port address decodes to 3D4
       3D1 port address decodes to 3D5
       3D2 port address decodes to 3D4
       3D3 port address decodes to 3D5
       3D4 6845 index register, selects which register [0-11h]
           is to be accessed through port 3D5
       3D5 6845 data register [0-11h] selected by port 3D4,
           registers 0C-0F may be read.  If a read occurs without
           the adapter installed, FFh is returned.  (see 6845)
       3D6 port address decodes to 3D4
       3D7 port address decodes to 3D5
       3D8 6845 Mode control register (CGA, EGA, VGA, except PCjr)
       3D9 color select palette register (CGA, EGA, VGA, see 6845)
       3DA status register (read only, see 6845, PCjr VGA access)
       3DB Clear light pen latch (any write)
       3DC Preset Light pen latch
       3DF CRT/CPU page register (PCjr only)

       3E8-3EF  COM3 non PS/2 UART (Reserved by IBM) (see UART)

 

       3F0-3F7  Floppy disk controller (except PCjr)
       3F0 Diskette controller status A
       3F1 Diskette controller status B
       3F2 controller control port
       3F4 controller status register
       3F5 data register (write 1-9 byte command, see INT 13)
       3F6 Diskette controller data
       3F7 Diskette digital input

       3F8-3FF  COM1 Primary Asynchronous Adapter  (see UART)

 

       3220-3227  PS/2 COM3 (see UART)
       3228-322F  PS/2 COM4 (see UART)
       4220-4227  PS/2 COM5 (see UART)
       4228-422F  PS/2 COM6 (see UART)
       5220-5227  PS/2 COM7 (see UART)
       5228-522F  PS/2 COM8 (see UART)

       - many cards designed for the ISA BUS only uses the lower 10 bits
         of the port address but some ISA adapters use addresses beyond
         3FF.  Any address that matches in the lower 10 bits will decode
         to the same card.   It is up to the adapters to resolve or ignore
         the high bits of the port addresses.   An example would be the
         Cluster adapter that has a port address of 390h.  The second
         cluster adapter has a port address of 790h which resolves to
         the same port address with the cards determining which one
         actually gets the data.