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> Framebuffer Size
friedgold
post Oct 2 2006, 04:46 PM
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How much memory is put aside for video under the Xbox kernel? Is it a fixed size or does it depend on the video mode / other factors? How would you go about finding it's current size?
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openxdkman
post Oct 2 2006, 06:07 PM
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I'm studying GPU at the moment... Maybe I will be able to answer you in a week or two from now
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openxdkman
post Oct 28 2006, 08:49 AM
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Sorry for the delay, but my progress in understanding GPU at lowest level took time to take off...

With openxdk, if you write at address 0x03C00000 (video frame address, actually physical address because no virtual memory is mapped at this location), you shouldn't write more than 4108288 bytes

It's not enough for higher resolution with multiple buffers, so better not use these resolutions for now.
I will know how to lower that address later.

Stay tuned, for future demos in order to unlock true xbox gpu power! (goal : to play with dma pushbuffers!)

(in fact, there are so many xbox 360 games that were designed for xbox 1 just before their release and so many games that are released both for xbox 1 and xbox 360 that solid knowledge of xbox 1 GPU at lowest level can probably allow interesting projects such as xbox 360 emulators running on xbox 1... for educational purpose only... to learn powerpc assembler language... and new ati overheated gpu abilities... hehe!)

This post has been edited by openxdkman: Oct 28 2006, 09:06 AM
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