*points

Come to think of it, all of the routines are a compilation of the best of the best well known routines.  Using it parts of it (not necessarily with macros) will definitely improve anybody's ASM program.  Granted, you will never understand how they work, but it's a lot of good routines.

Most notable routines that I hope to use for DEM:

Sigma's sprite routines; masked, AND, OR, and XOR logic
Jim e's RGP

 Well... I guess... use what you need to use.

If you need to use it, then you need to use it. If you don't use it, then you will have to code your own function to do the same thing. If you can make it faster or take less memory... then maybe going with your own function is the better choice.