Intel 386

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
4-10
Figure 4-5. DOS-Compatible Mode
3FFH
23H
22H
On-chip UART-0
On-chip UART-1
On-chip 8259A-2
On-chip Timer
0
On-chip 8259A-1
On-chip DMA
0
0H
REMAPCFG
Register
Expanded I/O Space
DOS I/O Space
00000 000
Note:
Shaded area indicates that
expanded I/O space peripherals
are not accessible
A2495-02
F000H
FFFFH