gbadev.org forum archive

This is a read-only mirror of the content originally found on forum.gbadev.org (now offline), salvaged from Wayback machine copies. A new forum can be found here.

Coding > Access to OAM during H-Blank

#1006 - Scritch - Mon Jan 13, 2003 10:36 am

Hello,

Does anyone know if modifying rotation/scaling data of a sprite during HBlank (after activating H-Blank Interval Free wich allows access to OAM during H-Blank) has any effect ? I'd like to do mode-7 effect with sprites...
I tried with Visual Boy Advance and it does not seem to work, but I can't try on real hardware (I have no cable or flash card).

Thanks

#1007 - Touchstone - Mon Jan 13, 2003 10:49 am

There's a flag in the display control register, I think, which you have to set to be able to modify OAM data in hblank.
_________________
You can't beat our meat

#1008 - Touchstone - Mon Jan 13, 2003 10:50 am

Oh sorry, never mind. :) I don't know if it has any effect.
_________________
You can't beat our meat