Assembly language program of square wave generation using 8085 microprocessor

In this section you will see the assembly language code to generate Square wave using 8085 microprocessor

Atfirst we assume that , CWR address of 8255 is 0B and SOC pin of 0808 is connected to 0th pin of PORT B

MVI A,89H
OUT 0BH
MVI A,01H
OUT 09H

BACK: MVI A,FFH
OUT 08H
MVI C,BOH

LOOP1: DCR C
JNZ  LOOP1
MVI A,00H
OUT 08H
MVI C,B0H

LOOP2: DCR C
JNZ LOOP2
JMP BACK

thank you

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