.&nbsp; That's okay;
the sprites use these colors.&nbsp; Also, except in Mode 0 (see <A HREF="#Reg2105">register
$2105</A>), four color BGs may only use colors 1 to 31.

<P>The horizontal and vertical flip bits, if set to 1, will cause the characters
to be mirrored when shown on the screen, so that they are facing the opposite
direction. When in 16x16 tile mode, the entire tile is flipped (pixel 0
is swapped with pixel 15) rather than the individual 8x8 sub tiles being
flipped.

<P>The <A HREF="#Terminology