This document provides examples of programs to: 1) Shift a number left by one bit, with an example using 7596H shifted to E0ACH. 2) Perform 8-bit division, dividing 489B by 1A as an example, with the quotient stored in 2504H and remainder in 2505H.

1. MICROPROCESSOR 8085
LECTURE 13
PROGRAMMING EXAMPLE
PROF. SANDIP DAS

2. WRITE A PROGRAM TO SHIFT A NUMBER LEFT BY ONE
BIT
Memory address Labels Mnemonics, operands Comments
2000 LHLD 2501H Get 1st number in H-L pair
2003 DAD H Shift left by one bit
2004 SHLD 2503H Store result in 2503H & 2504H
2007 HLT Halt
Suppose 7596H is the number which will be shifted left by one
bit.
0111 0101 1001 0110
(7) (5) (9) (6)

3. WRITE A PROGRAM FOR 8 BIT DIVISION
DIVIDE 489B BY 1A
Memory address Labels Mnemonics, operands Comments
2000 LHLD 2501H Get dividend in H-L pair
2003 LDA 2503H Get divisor from 2503H
2006 MOV B,A Divisor in register B
2007 MVI C,08 Count=08 in register C
2009 LOOP DAD H Shift dividend and quotient left by one bit
200A MOV A,H MSBs of dividend in accumulator
200B SUB B Subtract divisor from MSBs of dividend
200C JC AHEAD Is MSB part of dividend>divisor? No, go to
AHEAD
200F MOV H,A MSBs of dividend in register H
2010 INR L Yes, add 1 to quotient
2011 AHEAD DCR C Decrement count
2012 JNZ LOOP Is count=0? No, jump to LOOP.
2015 SHLD 2504H Store quotient in 2504H and remainder in
2505H
2018 HLT
Example-1
2501-9BH, 2502-48H, 2503-1A H(Divisor)
Result is-
2504-F2H (Quotient), 2505-07(Remainder)