Hello. I am beginer in MCS51, but I solve this problem at ASM.
Check Intel's Embedet Aplications Handbook for ideas
I found 3 diferent ways:
1. Calculate result direct
example:
A4*2^4+A3*2^3+A2*2^2+A1*2^1+A0*2^0=
=(((A4*2+A3)*2+A2)*2+A1)*2+A0
2. Calculate result using tables
example:
begin with LSB
is it true(log 1)
yes then add to result table value (001)
no then no add nothing
check next bit
3. Calculate result by substracting constants 1, 10, 100... from source digit
Sorry if my english is bad. Write my