Input/output Addresses
I/O address Device
000 - 00F
Slave DMA controller 1
020 - 021
Master interrupt controller 1
026
Configuration controller index registers
027
Configuration controllerdata registers
040 - 043 Interval timer 1
048 - 04B
Interval timer 2
060,064 Keyboard/mouse controller
061
NMl and diagnostic port
070
Real-time clock
070
Enable NMI
071
Real-time clock
078
BIOS loop timer
080
Power-on diagnostics error codes
081 - 08F
DMA registerpage
092
System control port
0A0 - 0A1
Slave interrupt controller 2
0C0-0DE Master DMA controller 2
0F0
Reset numeric coprocessor
0F8 - OFF
Numeric coprocessor
1FO - 1F8
IDE hard drive controller
278 - 27B
Parallel port 2 (LPT2); parallel port 3
(PS/2-compatible)
2C0-2DF Clockcalendar
2E8 - 2EF
Serial port 4 (COM4)
2F8 - 2FF
Serial port 2 (COM2)
B-8 Specifications
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