Intel 386 - Manual (Page 63)

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
4-12
Figure 4-6. Example of Nonintrusive DOS-Compatible Mode
3FFH
0
Internal DMA
0H
On-chip 8259A-1
On-chip UART-0
On-chip UART-1
On-chip 8259A-2
On-chip Timer
0
0 0 0 0 0 0 1 0
A2496-02
23H
22H
REMAPCFG
Register
DOS I/O Space
Note:
Shaded area indicates that the on-chip
DMA and expanded I/O space
peripherals are not accessible
Expanded I/O Space
F000H
FFFFH