Hello John,
I believe that the quick answer to your question is "yes...but-".
There are a number of situations where ppp is being used "over top" of
various network layers rather than a serial port driver. The most familiar
(to me) case is PopTop  (www.mortonbay.com/vpn/pptp.html), where ppp is
implemented over top of tcp and GRE (IP protocol 47). Perhaps you might  
want to look at the source for that to give you an idea of what (if
anything)  you need to include in your custom driver to emulate the
interface needed by ppp. Good luck.
George. 

On Mon, 23 Jul 2001, John F Davis wrote:

> Date: Mon, 23 Jul 2001 14:42:25 -0400
> From: John F Davis <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: ppp and custom built char device driver
> 
> Hello
> 
> Is it possible to run PPP on a non serial port char device driver?  I have
> written a simplistic device driver which
> allows communication between two processors on a pci bus.  I want to make
> the connection act like a network layer and
> I was thinking the easiest thing to do would get ppp working.
> 
> Any ideas on this?
> 
> John
> 
> 
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-- 
George Fouse, President  <[EMAIL PROTECTED]>
Quantum Technology Associates
www.quantumtek.net

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