BASIC PNG Example programs
--------------------------

The example programs supplied demonstrate the use of the SWI interface to
decode and encode PNGs. You should use :

!RunCreate -
   Runs TestCreate, converting the sprite spr24 into a PNG.

!RunFile -
   Runs TestFile, converting the PNG acorn to a sprite using the file
   interface.

!RunMemory -
   Runs TestMemory, converting the PNG acorn to a sprite using the memory
   interface.
