This model of development also meant cross-platform ports were practically rewrites. In practice it wasn't really possible to reuse code unless the target plat

This model of development also meant cross-platform ports were practically rewrites. In practice it wasn't really possible to reuse code unless the target platform had the same CPU and at least equal graphics features (as was the case with e.g. porting from Atari ST to Amiga). So every port started from scratch.