[atari7800] Re: 320 modes
- From: <bob.montgomery@xxxxxxxxxxx>
- To: <atari7800@xxxxxxxxxxxxx>
- Date: Thu, 10 Apr 2008 09:20:42 -0600
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
Other related posts:
