I think that the question is very "meaningful" and not so easy to accurately answer without going into assembly routines. I say this because you need to know the number of instruction cycles needed for each mnemonic, the time taken for each cycle (around 1uS at 4MHz I think), and finally what OP codes are driving the PBP instructions. You need to have a good understanding of assembly code to be able to work it out, which I don't have, otherwise I'd provide an answer.

Trent Jackson