gbadev : Message: Re: bizarre vsync issue maybe?

gbadev

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bizarre vsync issue maybe?

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Message #6735 of 15019 |

Re: bizarre vsync issue maybe?

> am> hiya :)
> [...]
>
> maybe what you are seeing isnt related to vsync at all, but the
effect
> that you get when doing not 16-bit aligned writes to vram ?
(read/write
> 16bit aligned words to vram only!)

Yup, this question has been asked/answered over and over and over...
Maybe it's about time someone makes a Top Ten Tips everybody has to
read before committing him/herself to GBA programming =D.

David Brioso

Sun Sep 2, 2001 2:58 pm

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Message #6735 of 15019 |

Expand Messages	Author	Sort by Date
hiya :) just started on this whole gba thing, but it feels a lot like good old mode 13h (ahh- nostalgia!). so, anyway, i'm in gfx mode 3. i've been coding a...	alex mole nal@...	Sep 1, 2001 3:15 pm
Hello alex, Saturday, September 01, 2001, 5:14:12 PM, you wrote: am> hiya :) am> just started on this whole gba thing, but it feels a lot like good old mode...	groepaz groepaz@...	Sep 1, 2001 3:22 pm
... effect ... (read/write ... don't think so- the screen buffer is cast as a u16*, so i don't think C would even let me not write 16bit aligned... alex :)...	nal@...	Sep 1, 2001 6:24 pm
ok- so i've worked out the problem: bits from several frames are being shown at the same time. after some optimisation and cleaning up, i discovered that...	nal@...	Sep 1, 2001 11:02 pm
... effect ... (read/write ... Yup, this question has been asked/answered over and over and over... Maybe it's about time someone makes a Top Ten Tips...	dbrioso@...	Sep 2, 2001 3:01 pm
... actually, that wasn't the problem ;-P. what was happening was a combination of a bug in mappy (the top line being updated a frame early), and the fact that...	alex mole nal@...	Sep 3, 2001 12:07 pm
... I've seen similar results on Mappy with various of my own projects. I always just assumed it was a problem with the emulator though since the same code...	Aaron R Leiby aleiby@...	Sep 1, 2001 11:03 pm
Actually, the effect I was seeing was in tile mode. The top row of tiles (when I pan the background around) was being updated a frame ahead of all the rest....	Aaron R Leiby aleiby@...	Sep 2, 2001 11:12 pm

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