May 2024
Intermediate to advanced
534 pages
17h 58m
English
book
8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
by Subrata Ghoshal
Content preview from 8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
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162
PROGRAMMING EXAMPLESII
11.9 | Sort Out Numbers Divisible by 4
Example 11.8
Purpose: To substitute division operation by the logical operation in special cases.
Problem
Create a new array by removing only those integers that are perfectly divisible by 4 from an array, starting from
31H. Location 30H contains number of terms of this array. e new array is to be created from the location
60H. At return, the accumulator should indicate number of terms found. Original locations with digits divis-
ible by 4 should be replaced by null.
Solution
For an unsigned integer to be divisible by 4, bits 0 and 1 must be zero. e algorithm to solve this problem is
given below.
Algorithm
Step 1: Initialize by loading counter (R7) by N value from the location ...
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