[atari7800] Re: 320 modes

Hi Eric,

>Each 160 pixel is 5 bits of line RAM.  The 320 modes only change how
the 
>bits are read, not written.  So unless all 5 bits are zero (and
kangaroo 
>mode off), then all bits are changed to the new value.  If kangaroo
mode is 
>on, then all 5 bits are always changed and any color 0 pixels are
displayed 
>as the background color.

Thanks; I had to read that a few times to understand it, and understand
how that answered my question - but I think I got it. ;)

But one thing: of the 32 values (5 bits), aren't several of them
transparent?  Aren't all of the following transparent: %00000, %00100,
%01000, %01100, %100000, %10100, %11000, %11100

Thanks,

-Bob

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