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Author Topic: Project Kiwi - an 68k Homebrew Computer  (Read 11494 times)

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Re: Project Kiwi - an 68k Homebrew Computer
« on: April 09, 2013, 08:58:03 PM »
Quote from: wawrzon;731648
aros is still everything else than lightweight im afraid. it would hardly be a pleasure to run it on 68000 class cpu. more work is needed and more involved experienced coders. sorry to say.
AROS is still more lightweight than Linux ;)

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Re: Project Kiwi - an 68k Homebrew Computer
« Reply #1 on: April 10, 2013, 10:29:30 AM »
Quote from: Linde;731699
If speed was really such a concern to any of us, why would we be using Amigas at all?
I don't think people are concerned the device will be slow, that's a given. The problem is that the 8bit bus will artificially limit the CPU for no really good reason.

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Re: Project Kiwi - an 68k Homebrew Computer
« Reply #2 on: April 10, 2013, 01:58:27 PM »
Quote from: Linde;731703
How is that an artificial limitation? The bus is a very tangible and real limitation for any CPU, boo-hoo.

Tell me, if they used a 68000, what would suffice as a "good reason" for that choice?
I said "artificial limit" because the 68000 works best with a 16bit bus.

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Re: Project Kiwi - an 68k Homebrew Computer
« Reply #3 on: April 11, 2013, 01:48:18 PM »
Quote from: psxphill;731759
I'm not sure. For most instructions the 68000 only accesses the bus every two cycles, where it fetches 2 bytes. I am too lazy to check, but it would not surprise me if the 68008 accesses the bus on every cycle. So it might not make much difference.
That would be reasonable, but I always thought the 68008 was just an ordinary 68000 with only 8data lines exposed, thus is would also suffer the every other cycle memory access penalty.

-Edit- But actually thinking about it, that would make almost all the addressing modes pointless...