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cheesestraws

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  1. Yeah, that's another sensible option; those usually seem to be a bit more expensive and a bit more unwieldy than an AUI transceiver, but are also useful in more circumstances (if you have something with only 10Base2, for example). Depends how general a tool you want
  2. That 15 pin port you have there is called AUI. It's a standard port for attaching different physical layers to. What you need is called a 10BaseT (or "10Base-T" with a hyphen) AUI transceiver. They're sometimes listed on eBay as "RJ45 AUI transceiver" instead. They aren't expensive; this person in the UK is selling some for under 10GBP each; you may be able to find similar more locally: https://www.ebay.com/itm/164514800709 They were extremely widely-used for years, so you shouldn't have too much difficulty in finding one for reasonable money .
  3. Aaaaand ordered. I might bug you for details on how to do the Seritek goodness at some point, but for now I'm just going to poke the bridge chip...
  4. Oh dear. International 120V boards can be turned into 240V boards. US ones cannot. (There are two different 120V ABs, because why make it simple?) However, I'm not sure what the survival rate is for these when overvolted. If you do end up on the hunt for a new AB, though, don't be disheartened—they're not particularly rare, I picked up a spare one this year for not too much. And hard-to-find components like the flyback (and perhaps the thyristor, if it tested good) are likely to be salvageable from that board.
  5. Thanks for the link and the detail if you see another of these for sale anywhere will you let me know? I'm slightly at the point where I can't do much more without actual hardware. And while I don't want to "take over" your project, it would be fun to have a go at getting one of these working
  6. This afternoon I've started looking at one of the other word definitions in the patch, "make-nodes". This is the core of the patch, and although I don't know all of what is going on in it yet, the broad strokes are fairly obvious. The tl;dr is that of course, the patch does not enable enumeration behind PCI bridges on OF. Instead, they've gone with the sensible low-effort approach of faking it instead of making it; the patch essentially constructs the devices that would have been discovered in enumeration. Here it is split into rough functional blocks: : ma
  7. Yes—there are settings to tweak to make sure that you're sampling the video properly on the Extron 300A. It has test patterns on the device so you can make sure that your LCD is displaying the output from the scaler right (the installation manual talks you through this) and once you've got those right, you should only need to tweak settings on the Extron itself; it will keep outputting the resolution and frame rate you asked it to regardless of what's coming in. I'm using one of the 10 dip switch adapters, but I've also had luck with the multisync ones with no DIP switch
  8. Yes. Then those are the resolutions it will output after processing, not the resolutions it supports going in. I made the same mistake the first time I read that spec sheet until I went back and read it more carefully. It's not very clear. Well. I can tell you that I have run mine with a number of weird refresh rates and resolutions and the results have always been good for me. So when I say 'it should work', I am doing so from a position of having thrown pretty much every Mac I have, every Acorn I have and every video card I have, and each time getting perfectly ser
  9. The output is not a fixed 60Hz on the Extron. Nor is it fixed at 1080p. The spec sheet says, under "video output" (here): There is a menu to select between these. Where are you getting this from? Are you confusing the "list of settings for PC resolutions" with the actual supported spec? (edit: Oh, are you looking at the screenshot I posted above? If so, that's the output modes, not the input modes) If so, I would note that I regularly run mine at 1152x864, which is a resolution not on that list at all. I've also had luck with some of
  10. Gahhhhh. Yes. You're right, my brain is apparently terminally confused. Bit 0. Value 1. Sorry.
  11. A CD-ROM's device type is 5, which already has the 1 bit set, so the 1 bit toggling itself on sometimes wouldn't prevent a CD-ROM drive from being seen as a CD-ROM drive. If that is showing !s instead of spaces, then it's likely that that is misbehaving in the same way.
  12. Glad it made sense! All those hours spent watching Big Clive on youtube paying off there...
  13. It's a kind of semiconductor device related to the transistor; you might also hear it referred to as a "silicon controlled rectifier", which I think is the more common name on that side of the pond. A transistor is an electrically controlled switch, essentially. It is a device with three wires, and applying electricity to one terminal of the device controls whether electricity can flow between the other two terminals (pedant's note: the precise definition of "applying electricity" varies with the type of transistor, but for the purposes of this discussion, we can gloss over that).
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