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. Although I have to say that the 8042 lost it's feature as a general purpose IO controler many years ago. -- B.Walter BWCT http://www.bwct.de [EMAIL PROTECTED] [EMAIL PROTECTED] _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
