Hi,
I'm trying to implement a PS/2 host controller on '877 for a mouse for a =
positioning app, and I'm having some trouble getting through the code =
required. (there sure is a lot of it for what is effectively a =
specialized shift register)  I'm using the code provided at=20
http://www.arne.si/~mauricio/PIC.HTM (which was desgined for a '84 btw, =
but I think I have it converted over by now)

The 1st problem is that while the documentation is OK, there are no =
defined entry or exit points for the code.  I don't quite know what to =
call to initiate a transmit or to recieve a byte.

The other problem is interrupt handling.  This is an interrupt driven =
routine, so I don't quite know what I need to setup to make these =
routines opperate correctly.  I assume that I will have to implement an =
interrupt handler, and that's not too big a deal, but there's also the =
problem of figuring out what flags I need to clear, and the =
documentation for the code isn't exactly clear on that.

So, what I'm wondering is if anyone has had any prior experience =
implementing a host controller and could help me out here.

If anyone has any ideas or has used these particular routines before it =
would be a pretty big help. =20

Thanks,

--Brendan

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