Hardware Programming

[Street Chaman]

hi everyone,

I need low level access to some hardware devices (kbd, sound, display) in an 
assembly soft; so I'd like to know were I can find all supported 
ioctl_syscall parameters for each device ?
Furthermore, if someone knows good (more complete than developpers-handbook) 
bsd - assembly doc/sources, it would help me a lot.

Thanks a lot

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