Tuesday, 14 November 2017

BCD to binary conversion in 8085

bcd to binary conversion in 8085bcd to binary conversion in 8085


Sample Problem:
(2200H) = 67H
(2300H) = 6 x OAH + 7 = 3CH + 7 = 43H
Source Program:
       LDA 2200H                : Get the BCD number
       MOV B, A                : Save it
       ANI OFH                : Mask most significant four bits
       MOV C, A                : Save unpacked BCDI in C register
       MOV A, B                : Get BCD again
       ANI FOH                : Mask least significant four bits
       RRC                        : Convert most significant four bits into unpacked BCD2
       RRC
       RRC
       RRC
       MOV B, A                : Save unpacked BCD2 in B register
       XRA A                        : Clear accumulator (sum = 0)
       MVI D, 0AH                : Set D as a multiplier of 10
Sum:   ADD D                : Add 10 until (B) = 0
       DCR B                        : Decrement BCD2 by one
       JNZ SUM                : Is multiplication complete? i if not, go back and add again
       ADD C                : Add BCD1
       STA 2300H                : Store the result
       HLT                        : Terminate program execution

1 comments:

Post a Comment

 
;