programb26 - Microprocessors Applications(UPTU Explanation...

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Microprocessors & Applications (UPTU) Appendix B ØØ Explanation : We have a 4 digit Hex number whose equivalent binary number is to be found i.e. FFFF H. Initially we compare FFFF H with decimal 10000 ( 2710 H in Hex ). If number is greater than 10,000 we add it to DH register. Also, we subtract decimal 10,000 from FFFF H, each time comparision is made. Then we compare the number obtained in AX by 1000 decimal. Each time we subtract 1000 decimal from AX and add 1000 decimal to BX. Then we compare number obtained in AX by 100 decimals. Each time we subtract 100 decimal from AX and add 100 decimal to BX to obtain BCD equivalent. Then we compare number obtained in AX with 10 decimal. Each time we subtract 10 decimal from AX and we add 10 decimal to BX. Finally we add the result in BX with remainder in AX. The final result is present in register DH with contains the 5 th bit if present and register AX. Display the result. ØØ Algorithm : Step I : Initialize the data segment.
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