AR-B1665 User’s Guide
APPENDIX A. ADDRESS MAPPING
IO Address Map
I/O MAP
ASSIGNMENT
000-01F
DMA controller (Master)
020-021
Interrupt controller (Master)
022-023
Chipset controller registers I/O ports.
040-05F
Timer control registers.
060-06F
Keyboard interface controller
070-07F
RTC ports & CMOS I/O ports
080-09F DMA
register
0A0-0BF
Interrupt controller (Slave)
0C0-0DF
DMA controller (Slave)
0F0-0FF Math
coprocessor
1F0-1F8
Hard Disk controller
250-258 Super
I/O
2B0-2DF
Graphics adapter controller
2F8-2FF Serial
port-2
360-36F Net
work
ports
378-37F Parallel
port
3B0-3BF
Monochrome & Printer adapter
3C0-3CF EGA
adapter
3D0-3DF CGA
adapter
3F0-3F7
Floppy disk controller
3F8-3FF Serial
port-1
Memory Map:
MEMORY MAP
ASSIGNMENT
0000000-009FFFF System
memory
used by DOS and application
00A0000-00BFFFF
Display buffer memory for VGA/ EGA / CGA /
MONOCHROME adapter
00C0000-00DFFFF
Reserved for I/O device BIOS ROM or RAM buffer.
00E0000-00EFFFF
Reserved for PCI device ROM
00F0000-00FFFFF
System BIOS ROM
0100000-FFFFFFF
System extension memory
27
