) elements
of the tile map will come on from the left (top) of the screen.

<P>If a pixel value is placed in this register that is larger than the
width of the BG, a modulus can be performed to determine what the actual
pixel will be that is displayed.&nbsp; For example, if the BG1 horizontal
pixel value is set to 257, but the width of the BG is 256 pixels, the result
will be the same as if it was set to 1.

<P>The m bits are used in Mode 7 only; I don't know what they are for.&nbsp;
The only thing I've det