Mirrored Display?

Hello,

i would like to use a mono LCD with a framebuffer driver.

I've modified existing drivers, and after a lot of work i now have a clear
picture on my display. Unfortunately, the complete picture is mirrored.
The Bootlogo is top/right instead of top/left and the ascii output starts from 
right to left. 

Where is the right place to modify this behaviour? 
I'm also looking for a possibility to rotate the picture.
Because my videocontroller can emulate 15 grayscales, i'm useing 4bpp.

It would be very nice, if someone can guide me in the right direction.

Thanks in advance!
Michael 




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