Re: Hardware emulation of 6509 using 6502?

From: groepaz_at_gmx.net
Date: Thu, 15 Mar 2018 23:02:19 +0100
Message-ID: <1615326.Hupx5OMdoF@rakete>
Am Donnerstag, 15. März 2018, 22:26:18 CET schrieb Mia Magnusson:
> Den Thu, 15 Mar 2018 21:50:02 +0100 skrev groepaz@gmx.net:
> > Am Donnerstag, 15. März 2018, 21:03:37 CET schrieb
> > 
> > silverdr@wfmh.org.pl:
> > > VICE is a different thing, and as smf mentioned, a "100%" accurate
> > > emulation of all the analogue idiosyncrasies of various
> > > combinations of VIC/mainboard revisions is close to impossible.
> > > What we talked about are the perceivable differences of the
> > > hardware's output. The biggest one (we talk PAL) is between 6569R1
> > > and the later revisions. The second biggest is between 6569R[2-4]
> > > and 8565 (was it? I dislike this VIC so much that I am not even
> > > sure if this is its proper number :-). The third is between the
> > > 6569R5 and 8565. If I didn't mix things up and differences inherent
> > > to various variants of the RF modulator aside.
> > 
> > its not that impossible really - its just that VICE implements all
> > that stuff completely in software that runs on the CPU right now, and
> > with that approach it would simply be way too slow. if try micro64,
> > which implements this stuff in GPU shaders :)
> 
> Come on, it can't be any noticeable amount slower to let blue be blue
> and not some terrible semi-magenta color :)

sure - and you can easily "correct" that yourself by tweaking the available 
options.

this red-ish blue btw is a "feature" of certain C64s - the default VICE output 
looks *exactly* like my C64 connected to a 1701 for that matter.

-- 

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Women don't know what they want; they don't like what they have got. Men know 
very well what they want; having got it, they begin to lose interest. 
<A.W.Adams>
Received on 2018-03-16 00:02:16

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