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Is there a meaningful difference between these two? two discontiguous blocks of memory, from A to B and C to D one contiguous block of memory from A to D, with a locked handle from B to C

There’s a difference between NTSC and PAL SNES controllers: the pullups for the data lines are internal to NTSC consoles, but PAL puts the pullups in the controllers instead. Those resistors look to be pullups for PAL compatibility. However, the result of the difference is usually that NTSC...

Same one. Exact same markings:

I don’t have a single-button ADB Sanwa mouse 👆 But I do have a MA-402MAC. It seems like they figured out there was a problem, and decided to implement a fix. Specifically, they wired /ABTN to a 33k pull-up (R9), and wired both mouse buttons to /PBTN. W…was that not the fix you expected? (Mmm...

I always thought DX-19 would be a nice name for it.

I hate to be a worrywart, but it might be time to think about moving that data to a more durable storage medium. Optical media doesn’t last forever, and a CD-RW burned 25 years ago is already at risk of failure. Uploading to the Garden or archive.org is a good way to ensure that these kinds of...

Thinking a little more, you might want topDirty and btmDirty variables which could increase or decrease (but not below 0) in case the user somehow managed ↓↑↑↓. Or if you retain the destination rect of the last scroll, could you draw whatever isn't contained in that?

I'm not following too clearly, but it looks like MyPaint() only checks the latest value of (*gMyInfo->iScroll)->contrlValue. What's to stop MyClickControl() from being called twice before the repaint occurs?

I had a hang installing OS9 in UTM too. I think what solved it for me was unchecking “update Apple disk drivers” in the installer.

Depending on the game, it may be possible to run it in a Z-code interpreter like Spatterlight or Frotz. Infocom games run in a portable interpreter, and there are several fan-made reimplementations of the interpreter for modern systems.

Seems like the sensible option would be to run LocalTalk over one pair and EtherTalk (and regular Ethernet) over the other two pairs, but I suppose this predates the ready availability of sensible options. I look forward to hearing how this functions when bridged to LocalTalk through a StarTalk hub.

I don't think it would be useful to me but I would still want one. 5/8 time?

I recall reading a retrospective article about networking problems with a passive star. The short summary is: it was supported up to 4 devices, and the author had problems around 30. A big part, possibly, was all of the terminators adding resistance. I don’t know if omitting some of the...

OPTi “FireLink” chip working as intended.

No, about 10 years old I think. From a Japanese company called Columbus Circle that makes a lot of Famiclone/peripheral type electronics.

Why would the blue color put me off?

That’s a slightly different error. (1 << 16) isn’t zero there, since int is wide enough to represent the value. The issue is in converting that value down to the actual type. Overflow during the calculation gives you different errors: % echo 'int main() { long long x = 1 << 32; }' | clang -x c...

Ah, sorry, I missed that requirement. Looks documented to work with MacTCP but not System 6.

For 1, GetDown Classic is exactly that.

Hmm, indeed you're right. “Inside Macintosh: Sound” shows some examples of non-sampled format 1 ‘ snd’ resources starting on 2-76 and a list of command on 2-93. There's a discussion of paying sounds asynchronously starting on 2-46. So it does seem like it could, in theory, be used for background...