The true earth gravity force depends on several factors, such as latitude and altitude. This estimation takes the latitude (north/south) into account, because although the constant 9.80665 m/s^2 is an accepted average, the true force varies.
Based on the source of Nonpareil, this is a romdump program that reads a ROM and writes the corresponding assembler code. It currently works only for the nut-processor familly.
A program that uses the shoelace method for calculating the area of a polygon (3 different versions, including one that runs on both the 48 and 49) and another version that also calculates the area and centroid (barycenter) of a polygon (for the 49 only). Also calculates the perimeter of a polygon.