Hang when writting in VRAM

chiwaw · Post by **chiwaw** » Thu Jul 28, 2005 2:46 pm

Apparently, if I write too much U16 in VRAM, at some point the system hang. Should I write my data using cached or non-cached transfert ? Is there anything I need to know when dumping lots of data in VRAM ?

Any tip more than welcome !

ector · Post by **ector** » Thu Jul 28, 2005 3:21 pm

Non-cached.
And how much are you writing? It's only 2MB, you know.

chiwaw · Post by **chiwaw** » Thu Jul 28, 2005 4:27 pm

Ok thanks to some clever ASSERTs, I figured that my bug came from the source buffer and not from the VRAM target.

Anyway, I'll take the occasion to ask more details on cached/non-cached transferts to VRAM. What's the big differences between the two ? And is the only thing I need to do for non-cached access is to use the 0x44000000 address ?