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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