Using mirrored VIC [was: Re: PCcard (2)]

From: Linus Åkerlund (
Date: 2001-04-10 10:41:41

On Tue, Apr 10, 2001 at 08:48:31AM +0200, Ruud Baltissen wrote:
> About compatibility: I don't know any valid reason why a good programmer
> would prefer the mirror addresses to program the VIC-II. So I presume all
> well written software should run on such an altered C=.
> IMHO the change can be performed on all C64's and C128's.

I'm not completely sure why, but the code in Crossbow's SHFLI viewer
(which comes with the editor) uses $d111 instead of $d011.  It's in
the huge, unrolled FLI loop, so I guess one reason to do it is to spot
errors more easily in the monitor.

Just an example. :-)

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