Find Bit Differences Between Two Binary Patterns in 8085

Here we will see how to find the bit differences of two binary patterns using 8085.

Problem Statement

Two binary patterns are stored in locations 8030H and 8031H. Load them in registers A and B. Find out the bit positions where bits are differing and put these location numbers at locations starting from 8050H on words. (Bits are differing at those locations where 0 in A and 1 in B)

Discussion

To solve this problem, we are taking the numbers into A and B. Then initialize the C as counter with 08H, and the register L will keep tract the bit position, where A has 1 and B has 0. By rotating the numbers through carry we can check these criteria. Let us consider we are putting B5H (1011 0101) and E6H (1110 0110), then we can see that the position D1 and D6 are not same. So we are storing 1 and 6 into the memory.

Input

Flow Diagram

Program

Output