#42797 - Impatient - Sun May 15, 2005 2:48 am
Say I have a 240 x 483 bitmap mode 3 and I just want a loop than scrolls the image up and down. Do the Game Boy Advance have scrolling registers ?? hilfe ... (help)
#42802 - tepples - Sun May 15, 2005 3:23 am
The GBA has scrolling registers, but it's easiest to use them in mode 0, not mode 3.
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#42804 - Impatient - Sun May 15, 2005 3:25 am
OK, thanks. need to figure out the scrolling registers. Need to scroll a mode 3 bitmap fillscreen
#42805 - tepples - Sun May 15, 2005 3:32 am
Mode 3 has only enough VRAM for 240x160 pixels, and it doesn't wrap at the boundaries of VRAM. If you want to scroll a full-screen, full-resolution image, you'll have to either 1. repeatedly overwrite the whole screen, or 2. overwrite only the lines at the seam and, when you get to the part where it would otherwise wrap except for the limitation of the GBA hardware, rewrite the scrolling registers during vblank.
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.