Bit blit routine, version 1

[Brian Hurt]

On 3 Feb 2004, Niels Möller wrote:

> If I understood the code correctly, the only operation so far is
> copying, but it could be generalized to n source operands and a
> selection of any of the 2^(2^n) possible boolean functions. The
> Amiga's blitter hardware used n = 3, and handled rectangular subsets
> of bitmaps.

You are correct- currently it's only copying.  Modifying the code to do 
various bitwise options, now that copy is working, is easy.

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Brian