Serial and interrupt

[test153]

I can answer that, I think. The name of your variable used in the asm routine needs to have an underscore preceding it in pbp, example:
_MyVar var byte

Thanks, it worked. Now there only one other problem. I get a bunch of warnings about "Found opcode in column 1" and then MPASM gives me a "too many errors" message.

Edit: Nevermind about that error, it turned out that one need a tab space before the asm commands.