Question

c) Figure Q4(c) shows an example of assembly programming. SETB P1.4 MOV C, P1.4 JNC OVER MOV P2, #'Y' SJMP AGAIN MOV P2, #'N' SJMP AGAIN AGAIN OVER Figure Q4(c) Explain the program by giving comments for all instructions. ) Revise the program using instruction JC instead of JNC. [CO3/PO3/C61 (10 marks)

Answer 1

64 When asten AGAIN :. check the stotus of the suoth, we use this JNC OVE R 竹 SJMP AGAIN OVE R PROGRA M COMMENTS ; make P I.4 an input SETB P1. MoY c, P 4, read the Sw status into CF JNC OVER AGAIN bt Jump ne SJM P AGAIN Keep monitoring SJHP AGAIN; keep menitoxing Here SET B 4 means SET8 x. y L Revis te progvnstruck» T inst of JNC AGAiN JC OVER keep monosirg OVER - Mov P2, 'N SJMP AGAINKeep montori