Blink port C bit 0 of 8255

Statement:Write a program to blink Port C bit 0 of the 8255. Assume address of control word register of 8255 as 83H. Use Bit Set/Reset mode.

Source Program:

BACK: MVI A, 0lH : Load bit pattern to make PCο high
OUT 83H : Send it to control word register
CALL DELAY : Call Delay subroutine
MVI A, 00H : Load bit pattern to make PCο Low
OUT 83H : Send it to control word register
CALL Delay : Call Delay subroutine
JMP BACK : Repeat

Delay subroutine:

Delay: LXI D, Count
Back: DCX D
MOV A, D
ORA E
JNZ Back
RET

Flowchart

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