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
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Flowchart for program
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