8255A port C bits

FOR MODE 1

PORT C
INTERRUPT SIGNAL
PIN NUMBER

 TO ENABLE
INTERRUPT REQUEST
SET PORT C BIT
PORT A IN PC3 PC4
PORT B IN PC0 PC2
PORT A OUT PC3 PC6
PORT B OUT PC0 PC2

FOR MODE 2 PORT C
INTERRUPT SIGNAL
PIN NUMBER		 TO ENABLE
INTERRUPT REQUEST
SET PORT C BIT
PORT A IN PC3 PC4
PORT A OUT PC3 PC6

Port C bits to set to enable interrupt request outputs for handshake modes