Subtraction of two 8 – bit numbers using 8051

To perform Subtraction of two 8 – bit numbers using 8051 instruction set.

ALGORITHM:
1. Clear C – register for Carry
2. Get the data immediately .
3. Subtract the two data
4. Store the result in memory pointed by DPTR


PROGRAM:
ORG 4100
CLR C
MOV A,#data1
SUBB A,#data2
MOV DPTR,#4500
MOVX @DPTR,A
HERE: SJMP HERE

OBSERVATION:
Input: 66
23
Output: 43 (4500)