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color modes for IONDRVDevice

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color modes for IONDRVDevice

Subject: color modes for IONDRVDevice
From: Folkert Saathoff <email@hidden>
Date: Tue, 29 Mar 2005 04:22:57 +0200


hello,
can someone tell me how to switch video modes in openfirmware?

i am toying around with openfirmware frame buffer programming
on my g4 15" powerbook, and it seems i can only get an 8 bit indexed
color mode at the moment. however, there surely is at least
an 8 bit grayscale setting too?

i _think_ there ought to be a .property in the device tree under
pci/AppleMacRiscAGP/uni-north-agp/ATY,CrownParent/ATY,Crown_A
which lets me do this, along with "screen-width", "depth" and
"linebytes"?

sorry for being offtopic/ thnx
/folkert


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