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Author Topic: DRAGON ColdFire FAQ  (Read 9879 times)

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Offline lordv

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Re: DRAGON ColdFire FAQ - photos, compability ?
« on: January 14, 2005, 04:59:06 AM »
Don't be too enthusiastic about it. They've promised to sell it in the end of Jan, but still don't have any photos. Strange...


Another big doubt - the real compability of V4/V5 coldfire cores with 68k.

First, it has FPU incompatible with 68881/882/040/060 - so no more lightwave/etc.

Second, apart from heavy-trapped emulation (to what it lead, you can see running lightwave on 060 without oxypatcher), there are still fully incompatible commands - for example, some mul's (with 64bit result) just fail to trap and yield wrong result. Nothing to say about incorrect flags with mul's/div's and much more.

http://www.microapl.co.uk/Porting/ColdFire/Download/CF68KLib.pdf , page 25

There are no mentionings about real compatibility with 68k apps, they either haven't ever tested the prototypes or just have nothing to say. The best would be sharkPPC - as the correct JIT has more chances to emulate 68k fully and at higher speed.