Melkhior's latest activity

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    Melkhior replied to the thread New Project: DoubleVision SE/30 Card.
    I think it's the issue is skills for now - having people involved that know how to do all the steps "after" HDL design - DFT...
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    Melkhior replied to the thread New Project: DoubleVision SE/30 Card.
    Yes, FPGA feels a lot more like hardware than software emulation. And things like PiStorm and other feel a bit off to me - when going...
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    Melkhior replied to the thread New Project: DoubleVision SE/30 Card.
    Hehe, me too. Much more fun to be able to fix/update/improve/extend the design even after the hardware is done :-) Neat. Is it purely...
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    Melkhior replied to the thread New Project: DoubleVision SE/30 Card.
    Dedicated chip(s) for video and/or acceleration, or are you using a FPGA for everything ? The rendering show quite a small chips for a...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    One document that can be enlightening is the "Guide to the Macintosh® Family Hardware, Second Edition", which is available from...
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    Melkhior replied to the thread IIFX ram gerber.
    Probably, but beware the behavior of MLCC capacitors. Voltage derating with DC bias can be really bad. Here's a cheap 50V, 100nF 0805...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    Mmm, never looked at the serial port in details. But AFAIK, if you're lucky, they will all be in the same place in the memory space -...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    Even limiting yourself to '040-based system, video can't be reliably determined, as Macs are perfectly fine when not using the onboard...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    There might be a reason for that, beyond the fact people with '030 design would not have minded the non-multiplexed bus. Quoting the...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    @Oliver_A NeXT or Mac or most others, the hardest part will always be the software. Amiga didn't use the MMU (that I'm aware), and most...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    Never realized they had done that - from the '040 timing diagrams, it doesn't seem to cost anything in performance though a lot of...
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    Melkhior replied to the thread New Project: Prodigy 040/060 Card.
    All the 80s 68k workstations were built to be the fastest 68k machines. The personal computers (Mac, Amiga, ST, QL, whatever) were the...
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    Melkhior replied to the thread Macintosh 68060 Redux.
    Agreed. The MC68060 is nice and all, but the lack of some integer instructions is a problem for old codes. The support package is nice...
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    Melkhior replied to the thread Basilisk II - Odd FPU Behaviour.
    To verify you do have a problem, you can take a pointer to the FP value, cast it to something integer, and then display as hex. Then you...
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