cvs commit: src/sys/dev/ic via6522reg.h
wb at freebie.xs4all.nl
Sat Dec 3 16:37:34 GMT 2005
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
> > 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 at FreeBSD.org
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