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http://www.nondot.org/sabre/os/articles/Co...icationDevices/

http://www.brillianet.com/programming/asse...ly/source_code/

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هاده لائحة خاصة بهدا وأخودة من أحد المواقع:

PC PORT ASSIGNMENT, Intel 8088, 80C88, 8086, 80286, 80386 CPUs

hex addr. Function

0000-000F 8237 DMA controller

0010-001F 8237 DMA controller (AT, PS/2)

0020-0027 8259A interrupt controller

0020-003F 8259A interrupt controller (AT)

0040-005F 8253-5 programmable timers

(note: 0041 was memory refresh in PCs. Not used in PS/2)

0060-0067 8255 peripheral interface

0060-006F 8042 keyboard controller (AT)

0070 CMOS Configuation RAM address (AT)

0071 data

0200-020F game-control adapter

0210-0217 expansion box (PC, XT)

0278-027F LPT3

02F8-02FF COM2

0300-031F prototype card

0320-032F hard disk controller

0378-037F LPT2

03BC-03BF LPT1

03CE Paradise VGA

03D0-03DF CGA, MCGA, VGA adapter control

03F0-03F7 floppy disk controller

03F8-03FF COM1

note: These are functions common across the IBM range. The PCjr, PC

Convertible and PS/2 (both buses) have enhancements. In some cases, the

AT & PS/2 series ignore, duplicate, or reassign ports arbitrarily. If

your code incorporates specific port addresses for video or system board

control it would be wise to have your application determine the machine

type and video adapter and address the ports as required.

IBM PC Input/Output Port Summary

Ref: PC Sourcebook, Page 396 Paragraph 7.03 I/O Port Usage Summary

Range XT Use AT Use PS/2 Use Comments

------- ------------------------------ ------------------------------ ------------------------------ ------------------------------

000-00F DMA Controller (8237A-5) DMA Controller (8237A-5) DMA Controller

010-01F UNDOCUMENTED RESERVED FOR SYSTEM BOARD DMA Controller

020-02F Interrupt controller (8259A) Interrupt controller 1 (8259A) Interrupt controller 1 (8259A) Only ports 20,21 actually used

030-03F UNDOCUMENTED Interrupt controller 1 (8259A) UNDOCUMENTED

040-04F Timer (8253-5) Timer (8254-2) System timers XT uses 40-43 only, PS/2 uses 40,42-44,47 only

050-05F Timer (8253-5) Timer (8254-2) UNDOCUMENTED

060-06F Parallel port (8255A-5) Keyboard (8042) Keyboard XT uses 60-63 only, PS/2 uses 60-61,64 only

070-07F UNDOCUMENTED RTC, NMI mask RTC, NMI mask PS/2 uses 70-71 only, reserves 74-76

080-08F DMA page registers DMA page registers (74LS612) DMA page registers XT uses 80-83 only, AT and PS/2 use 81-83,87,89-8B,8F only

090-09F DMA page registers DMA page registers I/O channel PS/2 uses 90-94,96-97 only

0A0-0AF NMI mask registers Interrupt controller 2 (8259A) Interrupt controller 2 (8259A) PS/2 uses A0-A1 only

0B0-0BF UNDOCUMENTED Interrupt controller 2 (8259A) UNDOCUMENTED

0C0-0CF RESERVED DMA controller 2 (8237A-5) DMA Controller

0D0-0DF UNDOCUMENTED DMA controller 2 (8237A-5) DMA Controller

0E0-0EF RESERVED RESERVED FOR SYSTEM BOARD UNDOCUMENTED

0F0-0FF UNDOCUMENTED Math coprocessor (80287) Math coprocessor (80x87) AT uses F0-F1,F8-FF only

100-10F UNDOCUMENTED AVAILABLE FOR IO CHANNEL Programmable option select PS/2 uses 100-107 only

110-1EF UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

1F0-1FF UNDOCUMENTED Fixed disk UNDOCUMENTED

200-20F Game I/O adapter Game I/O adapter UNDOCUMENTED Game IO uses 200-207 only

210-21F Expansion unit 21F RESERVED UNDOCUMENTED XT uses 210-207 only

220-24F RESERVED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

250-26F UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

270-27F Parallel printer 2 Parallel printer 2 Parallel printer 3 All use 278-27F only execept PS/2 uses 278-27B

280-28F UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

290-29F UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

2A0-2AF UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

2B0-2BF Alternate EGA Alternate EGA UNDOCUMENTED

2C0-2CF Alternate EGA Alternate EGA UNDOCUMENTED

2D0-2DF Alternate EGA (3270 also uses) Alternate EGA UNDOCUMENTED

2E0-2EF UNDOCUMENTED GPIB 0,data acquisition 0 UNDOCUMENTED AT uses 2E1,2E2-2E3 only

2F0-2FF Secondary asynchronous adapter Serial port 2 Serial port 2 (RS-232-C) All use 2F8-2FF only

300-30F Prototype card Prototype card UNDOCUMENTED

310-31F Prototype card Prototype card UNDOCUMENTED

320-32F Fixed disk adapter AVAILABLE FOR IO CHANNEL UNDOCUMENTED

330-33F UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

340-34F UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

350-35F UNDOCUMENTED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

360-36F UNDOCUMENTED PC network (low address) UNDOCUMENTED

370-37F Parallel printer Parallel printer 1 Parallel printer 2

380-38F SDLC or second bisync control SDLC or second bisync control UNDOCUMENTED

390-39F UNDOCUMENTED Cluster adapter UNDOCUMENTED

3A0-3AF First bysinc controller First bisync controller UNDOCUMENTED

3B0-3BF Monochrome display adapter Monochrome display adapter Video subsystem,Parallel printer 1

3C0-3CF Enhanced graphics adapter Enhanced graphics adapter Video subsystem

3D0-3DF Color graphics adapter Color graphics adapter Video subsystem

3E0-3EF 3E0-3E7 RESERVED AVAILABLE FOR IO CHANNEL UNDOCUMENTED

3F0-3FF Floppy disk adapter, 1st async Floppy disk adapter, 1st async Diskette drive control,Serial All use 3F0-3F7 for disk, 3F8-3FF for async communications

الكتابة قد تكون انقلبت اثناء النقل لكن هي دائما تقرأ على كل حال.

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