Re: [MiNT] EmuTOS for ColdFire

[Petr Stehlik <pstehlik@sophics.cz>]

Markus Fröschle píše v So 02. 05. 2009 v 13:38 +0200:
> Something which hasn't been mentioned yet, but is very important in my  
> opinion when it comes to TOS/MinT compatibility:
> 
> Although running MC680xx programs on a CF v4e CPU requires a CPU  
> emulation library, this is not absolutely necessary the other way  
> round. The Coldfire instruction set is more like a subset of the 680xx  
> instruction set than an enhancement and, with some care (only using  
> adressing modes and instructions which are available on both  
> processors)

...and avoiding MULS, MULU, ASL and ASR, which behave differently...

> it should be possible to write programs which run  
> natively on 680xx as well as Coldfire processor architectures  
> (although they might not run as fast on the older architecture than  
> they would if written exclusively for them).

And that would mean crippled binaries for old Atari users. 8/16/32 MHz
just got even slower.

Petr