Date: Sat, 3 Dec 2005 17:37:14 +0100 From: Wilko Bulte <wb@freebie.xs4all.nl> To: ticso@cicely.de Cc: Peter Jeremy <PeterJeremy@optushome.com.au>, src-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-src@FreeBSD.ORG Subject: Re: cvs commit: src/sys/dev/ic via6522reg.h Message-ID: <20051203163714.GA7525@freebie.xs4all.nl> In-Reply-To: <20051203144824.GB1040@cicely12.cicely.de> References: <200512022236.jB2MaEI8090052@repoman.freebsd.org> <20051202233249.GA1299@freebie.xs4all.nl> <20051202234929.GI44012@cicely12.cicely.de> <20051203060516.GM32006@cirb503493.alcatel.com.au> <20051203144824.GB1040@cicely12.cicely.de>
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On Sat, Dec 03, 2005 at 03:48:25PM +0100, Bernd Walter wrote.. > On Sat, Dec 03, 2005 at 05:05:16PM +1100, Peter Jeremy wrote: > > On Sat, 2005-Dec-03 00:49:30 +0100, Bernd Walter wrote: > > >Mmmm - very interesting stuff - I used the 6522 as well as the 6821 > > >on many self build 6502 and 68k based systems. > > ... > > >But honestly - I wasn't aware that a modern computer system still uses > > >them. > > > > You means things like nec765, i8237, NS8250, i8259, MC146818? One of > > No - I especially mean the 6522. > I grow up with C64 and C128 plus my first self build computers used > them, so there's a special relation. > > > my work colleagues was surprised to discover that his brand new > > computer still uses peripheral chips (embedded in ASICs) that were > > designed before he was born... Isn't backward compatibility a > > wonderful thing :-) > > Only sometimes, we all know the bad sides with e.g. 8259 in modern > systems. > > > At least back then the IC vendors would publish programming details... > > And by moving them to ASICs also add more bugs... > I'm always surprised if someone manages to write a nec765 driver that > runs on all chips. > > PS: to complete your list you'll have to add the 6845, 8254 and 8042. You forgot the 6850 ACIA. -- Wilko Bulte wilko@FreeBSD.org
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