Date: Sat, 3 Dec 2005 00:49:30 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Wilko Bulte <wb@freebie.xs4all.nl> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, Peter Grehan <grehan@FreeBSD.org> Subject: Re: cvs commit: src/sys/dev/ic via6522reg.h Message-ID: <20051202234929.GI44012@cicely12.cicely.de> In-Reply-To: <20051202233249.GA1299@freebie.xs4all.nl> References: <200512022236.jB2MaEI8090052@repoman.freebsd.org> <20051202233249.GA1299@freebie.xs4all.nl>
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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@bwct.de info@bwct.de
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