[atari7800] Re: Question about character data

Yes, the graphics do need to be upside down. Each DLL entry has an
offset that tells how many lines to use this display list on. The offset
is added to the high address of the graphics data and de-incremented on
each scanline. This is why the graphics need to be upside down.
 
Dan

-----Original Message-----
From: atari7800-bounce@xxxxxxxxxxxxx
[mailto:atari7800-bounce@xxxxxxxxxxxxx] On Behalf Of
debrodennis@xxxxxxxxxxx
Sent: Wednesday, August 11, 2004 2:29 PM
To: atari7800@xxxxxxxxxxxxx
Subject: [atari7800] Question about character data



Hi there,

I think I've finally got a grasp on how MARIA processes graphics but I
have another question.

I'm looking at Eckhard's backdoor.das file and I see his fonts are
upside down. Is this the way MARIA reads the data? I can't seem to find
anywhere in his source where he tells MARIA the data is stored upside
down or a decrement loop to load the data.

Take care,
Dennis

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