Hi,
  Has anyone implemented a simple four function calculator (8 digits
--add/subtract/multiply/divide) using a PIC?

  I'm only curious about the math... not the keyboard encoding nor
display drivers.   My first thought is that the AP-note 32 bit routines
would be adequate to the task plus a little something to take care the
decimal (or binary) point.

  If there is more than one approach, I'm more interested in code
compactness rather than speed of execution.

Thanx in advance for any suggestions!
    Jen :-)