Hi all,
well, I overlooked that part of multi-byte math-arithmetic as I was busy with my single byte arithmetic (in my current project) and I posted this question in that swing. My obvious choice now is to go for the multi-byte arithmetic operations (and yes Andy, I need to do computation like division and subtraction.
I cant use the C compiler as it is generating very huge code (atleast I cannot optimize it further to fit into 4k that my Atmel supports).So, I guess, I have to sit and jot down the code for M-B math. (or easy, I can copy most of it from the code section . Thanks Everyone. and by the way, am I right if I use this bit of code to decrement the DPTR...
<code>
mov dptr,#xxxx
....
....
dec 82h ; low byte of DPTR
...
...
</code>

Warm Regards,
Sriharsha