Re: Additional SIDs

From: Justin <>
Date: Thu, 1 Dec 2011 15:54:15 -0500
Message-Id: <>
The SCPU was a cool hack, but if I was going to wish for a random heroic hack,  I think that 80 column support on the 128's via the chameleon's VGA out would be way more useful than SCPU support since it would make it much easier to use one of the key differentiating features of the 128 over the 64.


On Dec 1, 2011, at 3:49 PM, Groepaz <> wrote:

> On Thursday 01 December 2011, you wrote:
>> On 2011-12-01, at 18:10, Groepaz wrote:
>>> no, chameleon does (and will) not emulate scpu.
>> Are there hardware limitations that prevent it? from being able to emulate
>> scpu? I was under impression that emulating A500 (which Chameleon
>> supposedly does already) is more of a challenging task in all aspects than
>> scpu. Although I admit I've never had scpu so I might be missing
>> something.
> a) we dont have a 65816 core. writing one from scratch which is halfway 
> accurate is a LOT of work
> b) making it work on the chameleon hardware with a fixed 20mhz clock will not 
> be easy, since the sdram is also used by the drive emulation and the vga 
> framebuffer (which eats bandwidth)
> c) the scpu contains copyrighted software (firmware roms) which can not be 
> copied without a license
> d) last not least: the fpga is getting full, and an additional 65816 core 
> would most likely not fit.
> so, i guess that in theory an scpu core could be implemented, but it is not 
> part of the "turbo chameleon 64" project.
> -- 
> Vorsicht: Lesen gefährdet die Dummheit!
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Received on 2011-12-01 21:00:23

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