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Input/Output Port Address Assignments
Part III: Appendixes
484
The following table lists the device names and their assigned I/O
port addresses for the computer.
Port
address(h)
Device/function
Notes
000-01F
82C37: DMA Controller 1
020-03F
82C59: PIC 1
040-05F
82C54: Timer
060-06F
Keyboard Controller
060 and 064 are KBC.
061 is system status port.
070
NMI mask register
070-07F
Real Time Clock
080-09F
DMA page register
0A0-0BF
82C59: PIC 2
0C0-0DF
82C37: DMA Controller 2
0E0-0E1
PCI Bus
0F0-0F7
Math Coprocessor
100-1EF
VGA
170-177
CD-ROM (Secondary IDE
Controller)
1F0-1FF
Hard Disk Controller
(Primary IDE Controller)
201
Joy Stick
202-21F
Not used
000-book.bk : 82-resrc.fm5 Page 484 Wednesday, May 15, 1996 4:15 PM