cvs commit: src/sys/dev/ic via6522reg.h

[Bernd Walter]

On Sat, Dec 03, 2005 at 12:32:49AM +0100, Wilko Bulte wrote:
> On Fri, Dec 02, 2005 at 10:36:14PM +0000, Peter Grehan wrote..
> > grehan      2005-12-02 22:36:14 UTC
> > 
> >   FreeBSD src repository
> > 
> >   Added files:
> >     sys/dev/ic           via6522reg.h 
> >   Log:
> >   Register definitions for the ancient via6522. This 20+ year-old chip
> >   still exists as a cell in the Macio asic on Apples, and is used to communicate
> >   through the shift register with the external PMU microcontroller.
> 
> Ah... our famous Versatile Interface Adapter chip!  I'm more familiar
> with the 682[01] but this one is nicer ;)

Mmmm - very interesting stuff - I used the 6522 as well as the 6821
on many self build 6502 and 68k based systems.
Usually a single 6522 to get system timers and then 6821 for firther
GPIO.
Since it's only a small step to the 6526: can we expect a C64 port
soon ;-)
But honestly - I wasn't aware that a modern computer system still uses
them.

-- 
B.Walter                   BWCT                http://www.bwct.de
bernd at bwct.de                                  info at bwct.de