cvs commit: src/sys/dev/ic via6522reg.h
ticso at cicely12.cicely.de
Fri Dec 2 23:49:54 GMT 2005
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 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
Since it's only a small step to the 6526: can we expect a C64 port
But honestly - I wasn't aware that a modern computer system still uses
B.Walter BWCT http://www.bwct.de
bernd at bwct.de info at bwct.de
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