680x0->PPC (or Coldfire)??

Smith, Gene Gene.Smith at sea.siemens.com
Fri Jun 14 19:09:14 UTC 2002

> -----Original Message-----
> From: Joel Sherrill [mailto:joel.sherrill at OARcorp.com]
> Sent: Friday, June 14, 2002 1:08 PM
> To: Smith, Gene
> Cc: 'rtems-users at oarcorp.com'
> Subject: Re: 680x0->PPC (or Coldfire)??
> "Smith, Gene" wrote:
> > 
> > Does anybody out there have any feel for how hard it is to 
> convert from 68k
> > to Power PC or Coldfire? Have a 68020 board that is 98% 
> assemby and might
> > want to upgrade the processor to something 
> newer/faster/lower-power with
> > minimal code rewrite.
> Yikes!! With that much assembly it isn't going to be easy. 
> I have moved applications from the m68020 to the powerpc without
> trouble but they were predominantly in C so the pain was
> minimal.
> Extraction of algorithms into C is probably the best route.
> All device driver code is probably questionable anyway so
> it can 

so it can ...?  Hi Joel, Haven't seen your name pop-up for a while. Did find
something made by some guys in nl which claims to convert 680x0 code (from
an Amiga) to PPC.
Not sure how reputable they are (they never answered my email). Anyhow, the
coldfire might be easier to port to and Motorla gives you a assembly
converter for it (PortASM/68k). 
.Any feel for diff between ppc and cf for low level embedded stuff?

> > -gene
> -- 
> Joel Sherrill, Ph.D.             Director of Research & Development
> joel at OARcorp.com                 On-Line Applications Research
> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
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