what does kernel device puc do?

[Jason]

fbsd_user wrote:

>Can some one explain what the kernel device  puc statement does. 
>LINT does not give an info.
>
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You do not need it.  If you check the developers or archictics handbook 
you should find lots of detail there.  Its a driver for all the older 
serial ports I think.  It has some educationail purposes too.  If you 
look in the source file and read the comments it tells what it does.