Re: Hardware emulation of 6509 using 6502?

From: Mia Magnusson <mia_at_plea.se>
Date: Thu, 15 Mar 2018 18:02:43 +0100
Message-ID: <20180315180243.000010b3@plea.se>
Den Thu, 15 Mar 2018 15:13:53 +0100 skrev silverdr@wfmh.org.pl:
> 
> > On 2018-03-15, at 14:24, Segher Boessenkool
> > <segher@kernel.crashing.org> wrote:
> > 
> > The 65xx SID has highly non-linear "opamps".  The 85xx fixes that.
> > Not everyone likes it, of course.
> 
> It fixes also the bad clicks during volume change for example. Or is
> it the side-effect of the above?

Clicks when changing volume is due to DC present somewhere. It's
probably related but a different thing.

> > causing
> > the sparkles.  A little cap (from CS to ground) solves this.  There
> > is no difference between the 65xx and 85xx VIC here.
> 
> Even sparking aside, the picture is noticeably different. I don't say
> "better" or "worse" but it is different.
 
IMHO this is a problem with VICE. Iirc I've tried all settings and no
one looks like most real PAL C64/C128's do. My memory may be incorrect.


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Received on 2018-03-15 19:00:03

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