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Discussing the Open Source FPGA Amiga Project
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 Post subject: 68k core vs ARM core
PostPosted: Thu Jan 23, 2014 9:35 am 
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Joined: Sat Dec 20, 2008 7:31 am
Posts: 44
Are the "revisions" for the 68k core and ARM core the same, or the ARM is much newer, meaning more compatbility with games, more accurate emulation etc?

Thanks!


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 Post subject: Re: 68k core vs ARM core
PostPosted: Thu Jan 23, 2014 10:14 am 
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Joined: Tue Nov 09, 2010 3:10 pm
Posts: 316
There is no ARM 'core', minimig uses either a real 68k chip or a softcore one PLUS a control chip, which can be an ARM controller (like on the Mist board, or for the original minimig board, the ARM addon board which replaces the PIC controller).

So there's always a 68k in some form which is running the 'Amiga', the control chip just handles the floppy, harddisk and the OSD display.

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 Post subject: Re: 68k core vs ARM core
PostPosted: Thu Jan 23, 2014 10:30 am 
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Joined: Sat Dec 20, 2008 7:31 am
Posts: 44
Thanks for pointing that out, but back to the original question, is the 'arm' version more compatible? (I am talking with the games as such, not the extra things that it brings such as 4 drives and HDF support).


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 Post subject: Re: 68k core vs ARM core
PostPosted: Thu Jan 23, 2014 10:49 am 
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Joined: Mon Dec 01, 2008 9:58 pm
Posts: 1568
Location: .de
Floppy access basically is the same for all MCUs (PIC, ARM or TG68k as a softcore).
But there is differences, at least with PIC and ARM even if both are using the same basic C sources.

PIC internally works different (mostly slower) than ARM and there are a few game title that do not load with the PIC. With ARM the same adf works fine.
Same may happen be with the 68k softcore MCU, but I can not tell for sure nor test it out.

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