Can anyone provide any interesting usage examples of these?
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jjujuma,
For a trivial example you could use this to implement some Object Oriented style procedure like Draw. You’d call a Circle_Draw procedure for a Circle or a Square_Draw procedure for a Square by assigning the appropriate %PADDR of the Circle_Draw or Square_Draw to your Draw procedure pointer. When calling the Draw procedure pointer you hide which procedure (Circle_Draw or Square_Draw) you’re calling.