Yes, I was aware of that after reading one of your earlier posts. I am sitting slightly under 50% of my available code space (on an 18f452), and on top of that the data sending routines are used in a part of the code where speed is preferable (but not critical). To use the fastest method I would have to find out what macros HSEROUT calls, and call them directly somehow.... and the smallest code version would be something along the same lines using gosubs. Anyway if the timing becomes more important or code space is an issue then I will rewrite the macro. But for the meantime, I have improved readability by a large degree. Thanks for the ideas/wisdom guys, it's great to know that there's such a concentrated pool of knowledge in this forum to ask when I have a tough PBP question.....