Appendix
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28
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Each peripheral device in the system is assigned a set of I/O port addresses
which also becomes the identity of the device.
The following table lists the I/O port addresses used.
3
.1 I/O Port Address Map
Address
Device Description
000h - 0Fh
DMA Controller #
020h - 03Fh
Interrupt Controller #
040h - 0Fh
Timer
060h - 06Fh
Keyboard Controller
070h - 07Fh
Real Time Clock, NMI
080h - 09Fh
DMA Page Register
0A0h - 0BFh
Interrupt Controller #2
0C0h - 0DFh
DMA Controller #2
0F0h
Clear Math Coprocessor Busy Signal
0Fh
Reset Math Coprocessor
F0h - F7h
IDE Interface
278h - 27Fh
Parallel Port #2 (LPT2)
2F8h - 2FFh
Serial Port #2 (COM2)
2B0h - 2DFh
Graphics adapter Controller
378h - 3FFh
Parallel Port # (LPT)
360h - 36Fh
Network Ports
3B0h - 3BFh
Monochrome & Printer adapter
3C0h - 3CFh
EGA adapter
3D0h - 3DFh
CGA adapter
3F0h - 3F7h
Floppy Disk Controller
3F8h - 3FFh
Serial Port # (COM)
Содержание 3308180
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