Re: CIA TOD Alarm Bug

From: groepaz_at_gmx.net
Date: Thu, 09 Mar 2017 23:37:31 +0100
Message-ID: <3654386.dlggYRWUh0@rakete>
On Thursday 09 March 2017, 16:12:46 Segher Boessenkool 
<segher@kernel.crashing.org> wrote:
> On Wed, Mar 08, 2017 at 06:45:01PM +0100, groepaz@gmx.net wrote:
> > i am investigating differences in the CIA behaviours (NMOS vs HMOS
> > versions, ie 6526 vs 8521) at the moment. one thing that is pretty
> > unclear to me, is a supposed bug in the TOD alarm behaviour. i can find
> > some references to it on the web, which somehow look like one copied from
> > the other to me - without
> > ever mentioning the exact details:
> There also is 8520.  I haven't yet seen good pictures of the 8521, but
> the pictures that are there show that 8520 and 8521 are nothing alike
> (and neither is like the 6526, either -- in the physical layout anyway).

8520 is irrelevant in this context - the "TOD" is completely different 
afterall :)

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