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    Mac Plus screen unstable when cold

    Mine also emitted a quiet ticking, FWIW, until it had warmed up; I somehow forgot to put that in the post. This feels unlikely to be the flyback to me, but I don't know a huge amount about CRTs, so that's only intuition. If you can measure stability, are the HSync and VSync good solid...
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    Mac Plus screen unstable when cold

    Does it look anything like this? https://68kmla.org/bb/index.php?threads/fix-report-wibblyplus-wibbles-no-more.38964/ For me, this turned out to be corroded solder joints on non-cap components in the PSU, right at the bottom of the board. If you can, measure the ripple on your voltage lines...
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    Help getting started with retro software development

    ResEdit is really customisable. In theory you could write an editor to be able to edit your maps directly in ResEdit, but that's probably more trouble than it's worth...
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    ordering external power supply

    Doesn't show input voltage; but since it specifies 60Hz I bet it's also 120V only. So not suitable for OP :(
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    MacSD Commander

    This is great, well done. That's a really nice addition to the MacSD.
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    ordering external power supply

    AC wall PSUs are very unlikely to be multi-voltage unless they have a switch on them: the techniques that enable that for AC/DC converters are basically closed off to them. (Sorry for double post, mind wibbled)
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    ordering external power supply

    You've got good eyes! I don't think mine had the AC/DC note either but it worked off 12V DC fine.
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    TashTalk: Single-Chip LocalTalk Interface

    A couple of thoughts: All normal mac serial cables are crossover. DCE/DTE isn't a thing in the mac world. Localtalk boxes would also rely on straight wiring. To me, having the jumper for crossover/straight is an invitation to people making it not work and then complaining about it. Pretty...
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    New old dev tools found

    Ooooh yes. If you ever get the time, pleeeeease scan the manual, I'd really like to read the stuff about how that all works.
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    Help getting started with retro software development

    Sometimes you just need someone to use the right words. I've been stumped on stuff before that suddenly made sense after someone explained it, then felt like it should have been reasonably obvious :) For unknown resources, ResEdit will just give you a hex editor, so you can still check that...
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    Help getting started with retro software development

    I think you're confused here because you're conflating two layers of things. A resource is just a blob of data. When you get a resource, you just get a handle to a block of memory containing that resource. You can treat that block of memory in any way you like. A resource type is just a...
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    ordering external power supply

    We can certainly have a look! That's the maximum current that the supply can provide, not the amount it will force through. You're generally fine to use a higher-rated PSU (in the current department) with a lower-rated device, the device just won't pull the extra current that would be...
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    ordering external power supply

    Oh, yeah, RMS not peak-to-peak. You can tell I'm not used to thinking about AC, can't you... :-)
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    ordering external power supply

    Wouldn't you have that anyway, though, even with the AC adapter? The voltage drop across the diodes will remain regardless of whether its input signal is varying or not? Am I missing something?
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    Is there a known, understood, technical explanation for why A/UX cannot be run on the Quadra 630?

    For the 605/475 I believe it's lack of video drivers being the biggest thing. The 630 has even more variations from the supported machines, so I'd expect more drivers would be needed. I don't think there's any theoretical reason why someone couldn't write drivers for these machines, with...
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    ordering external power supply

    Nearly everything that works on 12V AC will also work on 12V DC. It just means that the first stage in the box is a bridge rectifier and smoothing, rather than having that in the wall plug. This used to mean that you could just have a transformer in the wall plug, which made it...
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    System memory use between 24-bit and 32-bit addressing

    Woo, I'm glad it helps :-)
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    From a Macintosh Hard Disk 20 (M0135) to a disk image for an emulator?

    That's probably what most people would have done at the time.
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    System memory use between 24-bit and 32-bit addressing

    I might have written an extension that can help with that... https://github.com/cheesestraws/Force32
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    System memory use between 24-bit and 32-bit addressing

    I think the problem here is that you'd have to have a machine that's capable of 32-bit addressing mode anyway to be able to pull this off, because you'd need to temporarily switch to 32-bit mode to address that memory (I actually looked into this while looking at using chunks of the I/O address...
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