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Author Topic: Have you seen this?? (Coldfire accelerator from elbox!)  (Read 6975 times)

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Offline KennyR

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Re: Have you seen this?? (Coldfire accelerator from elbox!)
« on: December 17, 2004, 04:54:48 PM »
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PMC wrote:
It might not necessarily return the speed increases we are anticipating, the only way to tell is to see it working on our own systems.

For example, there must be a patch / emulation layer there to execute the instructions absent from the Coldfire. IIRC Coldfire CPUs aren't fitted with an FPU (someone might want to clarify), so floating point maths will need to be emulated somehow.

Either the system will be held together with patches, retargetting commands and glue logic (the flash ROM is 2Mb in size, four times larger than an A1200's ROM) or it may well require a coldfire specific compile of software to run at it's full potential.


As Neko told me this morning on IRC in his archetypally unpleasant way, this is no longer true. Freescale have an emulator for missing 68k instructions on Coldfire v4 and will give to anyone who asks. It can be put on firmware. The overhead this way is negligable, and not as scary as popularly believed.
 

Offline KennyR

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Re: Have you seen this?? (Coldfire accelerator from elbox!)
« Reply #1 on: December 17, 2004, 04:56:22 PM »
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x56h34 wrote:
If indeed released, this thing would be capable of running 68k environment on steroids, and would not be able to run OS4.0 which is a PPC operating system.

In other words, you would still need either a BPPC/CSPPC card for your classic Amiga, or an AmigaOne, if you wish to run OS4.0.


But...but...but Ben Hermans of Hyperion said that all you have to do is change flags and recompile modules for the same endian processor!!! It's easy, only idiots can't do it!

;)