ASEM CPU 1021/A - I;O Address Map

CPU 1021/A User’s Guide
38 Asem S.p.A.
I/O Map
The values of the addresses that appear in the tables are expressed
in hexadecimal.
Addresses
Description
000-00F
DMA controller 1, channels 0-3
010-01F
Reserved
020-021
Interrupt controller 1
024-03F
Reserved
040-043
System Timer
044-05F
Reserved
060-064
Keyboard controller
061
Port B for the control of the system
065-07F
Reserved
080-08F
DMA page register
090-09F
Reserved
0A0-0A1
Interrupt controller 2
0A2-0BF
Reserved
0C0-0DF
DMA controller 2, channels 4-7
0F0-0FF
Math coprocessor
170-177
Secondary IDE channel
180-187
Watch-dog / LCD contrast adjustment
1F0-1F7
IDE primary channel
274-279
Reserved
2E8-2EF
Serial port 4
376
Secondary IDE channel
378-37F
Parallel Port
3B0-3DF
Video VGA
3E0-3EF
serial port 3
3F0-3F7
Floppy disk Drive