Re: SuperCPU for my C64 and C128

Date: Mon, 23 Jul 2018 23:59:01 +0200
Message-ID: <1671641.u67AS4Evt8@rakete>
Am Montag, 23. Juli 2018, 23:54:26 CEST schrieb smf:

> >> You still need to support all the supercpu mirroring schemes as well,
> >> or you won't be able to get the correct timing for demo effects.
> > 
> > Will 6510 based demos work at all on a 65816? I'd assume that they use
> > some well known illegal op codes?
> You misunderstood, I am talking about 65816 demo effects.
> I don't know how many 6510 demos use illegal opcodes, but none of my old
> demos used them though.

a lot of them do. pretty much all "modern" ones probably :)

a bigger problem is the commonly used RMW instruction to acknowledge 
interrupts though (inc $d019) - that doesnt work on 65816, meaning a whole lot 
of simple raster interrupt stuff will not work.


Mit dem Aberglauben ist es so eine Sache. Ich habe noch keinen Menschen 
getroffen, der sein dreizehntes Monatsgehalt zurückgegeben hätte. 
<Fritz Muliar>
Received on 2018-07-24 01:00:04

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