User`s guide

Input/output Addresses
I/O address
000-00F
020 - 021
026
027
040 - 043
048 - 04B
060,064
061
070
070
071
078
080 - 08F
092
0A0 - 0A1
0C0 - ODE
0F0
0F8 - OFF
1F0 - 1F8
278 - 27B
2C0 - 2DF
2E8 - 2EF
2F8 - 2FF
378 - 37F
3B0 - 3BB
Device
Slave DMA controller 1
Master interrupt controller 1
Configuration controller index registers
Configuration controller data registers
Interval timer 1
Interval timer 2
Keyboard/mouse controller
NMI and diagnostic port
Real-time clock
Enable NMI
Real-time clock
BIOS loop timer
DMA register page
System control port
Slave interrupt controller 2
Master DMA controller 2
Reset numeric coprocessor
Numeric coprocessor
IDE hard drive controller
Parallel port 2 (LPT2); parallel port 3
(PS/2-compatible)
Clock calendar
Serial port 4 (COM4)
Serial port 2 (COM2)
Parallel port 1 (LPT1); parallel port 2
(PS/2-compatible)
WD90C31 onboard video registers
Specifications B-9