8086 program to reverse 16 bit number using 8 bit operation

In this program we will see how to reverse a 16-bit number using 8-bit operation.

Problem Statement

Write 8086 Assembly language program to reverse a 16-bit number which is stored at location 2000 and 2001, using 8-bit operations.

Discussion

8086 has 8-bit operation for rotation. For 16-bit number, we are taking the bytes from 2000 and 2001. Then rotate each byte with ROL instruction. After that put the numbers in reverse form to reverse the bytes. Like the content of 2000 will be stored at 2001 after reverse, and content of 2001 will be stored at 2000 after reverse.