driver how-to?

Hi, everybody!

I'm going to port very old Western Digital driver from Xfree86 3.3.6
back to 4.6.x just to start my old laptop in 640x480x256 mode. I think
nobody then me interested in this driver, so it's just for fun,
nevertheless I need some guide lines to start development, for example,
how-to's of writing generic driver for Xfree86, directory hierarchy and
so on. Can somebody turn my head to the right side?

Best regards, 
Mikhail


	

	
		
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