DIO Programming
Eight registers are used for DIO programming.
Offset | Description |
00h | 8255-1 port A DIO register |
01h | 8255-1 port B DIO register |
02h | 8255-1 port C DIO register |
03h | 8255-1 control and status register |
04h | 8255-2 port A DIO register |
05h | 8255-2 port B DIO register |
06h | 8255-2 port C DIO register |
07h | 8255-2 control and status register |
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