I/O Addressing - NEC VERSA 2000 Service And Reference Manual

I/O Addressing

The CPU works in conjunction with I/O devices using I/O mapping. Refer to Table Section
2-6 for hex addresses.
Table Section 2-6 Versa 2000 Series I/O Address Map
Address (Hex)
000-00F
020-03F
040-043
048-04B
060-064
061
070
070-076
081H-083H
087H
089H-08BH
08FH
092H
0C0H-0CEH
0D0H-0DEH
0102H
0278H-027AH
02F8H-02FFH
0372H-0377H
0378H-037AH
03BCH-03BEH
03F0H-03F5H
03F8H-03FFH
0461H
0C00H
0C01H
0C02H
0C03H
I/O Device Name
DMA Controller 1
Interrupt Controller 1
Timer 1
Timer 2
Keyboard Controller, 8042
NMI Status
NMI Mask
Real-time Clock
DMA Page Register
DMA Page Register
DMA Page Register
DMA Page Register
Port 92
DMA Channel
DMA Controller 2
Parallel Port Configuration
LPT2 Data Port
Serial Controller Port B
Diskette Drive Controller
LPT1
LPT3
Diskette Drive Controller Port Status
Serial Controller Port A
Port 461 EISA mode
Extended System Port 1
Extended System Port 2
Extended System Port 3
Extended System Port 4