Hi all,

I need to calculate a CCITT-16 reversed (0x8408) checksum in PBP but need a little assistance. I've uncovered an assembly routine that would seem to do what I need ( see http://www.dattalo.com/technical/software/pic/crc.php ) but I'm not very familiar with the integration of assembly routines into a PBP program and am hoping someone can help me out a little here.

What I need to do is send an array of bytes to this routine and come up with a two-byte checksum as a result. An example would be to send the bytes 'AA 05 01' to the routine and have the checksum 'D5 50' returned. Problem is that I don't know how to pass the variables back and forth between the BASIC program and the assembly routine, etc.

Sorry if this is a bit elementary... (or perhaps it isn't..?)

Anyway, would greatly appreciate any help...

Thanks,
Steve