[atari7800] direct indirect headers

Hi all,

Re-reading the Maria doc again, this has me a bit confused:
Cut-n-paste here, from the section explaining 5-byte headers:
         ADDRESS  (A15-A0)    - Address of graphics information.
         MODE BYTE: WM        - Write mode bit.
                                0 => 160x2 or 320x1
                                1 => 160x4 or 320x2
         IND                  - 0 => Direct mode.
                              - 1 => Indirect mode.
         PALETTE  (P2-P0)     - Refers to color palettes 0-7.
         WIDTH    (W4-W0)     - 2's complement of width.
                                Specifies number of bytes of
                                graphics data to fetch: values
                                1-32.

         HORIZONTAL
         POSITION (H7-H0)     - X location on the screen where left
                                edge of graphics is to be placed.
                                  0-159 => Visible
                                160-255 => Not visible.
                                Wrap around occurs at 255/0
                                boundary.

This would seem to imply...that you can use a 5-byte header for direct
mode?
And if not, how *does* Maria interpret the 2nd byte of a header of this
form:
%W1000000

?

If you *can* use a 5-byte header for direct sprites, a few questions:
Couldn't you then have direct sprites with a width of 32?
Couldn't you then set the write mode for direct sprites, um, directly?
Rather than having to use a dummy 5-byte indirect header?

Thanks,

-Bob

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