James Groom

I didn't try that because I assumed loading a state with different sync settings would fail, and from https://github.com/TASEmulators/BizHawk/issues/3092#issuecomment-1240843456 it sounds like that is the case.

Mupen's savestates might not be correct, but I would still consider this a gamedb issue, because if the savestates worked properly you'd still need to figure out that the Expansion...

I think you're confusing the *rom file checksum* that EmuHawk shows you and the *embedded checksum* that Genesis rom headers include [at 0x18E](https://www.zophar.net/fileuploads/2/10614uauyw/Genesis_ROM_Format.txt). Leaving this open until the gamedb is...

Also https://github.com/SnowflakePowered/chd-rs

I'm ambivalent on the idea of a code of conduct, but if anyone cares enough to draft one, that will be GitHub's [community checklist](https://github.com/TASEmulators/BizHawk/community) done (apart from a 1-minute fix...

There don't seem to be any emulation changes to IntelliHawk between 2.4 and 2.7. Could you check 2.7?

This maybe? It's only run if the file is empty though. https://github.com/TASEmulators/BizHawk/blob/480ce3b925c74a4bb4a1f9a869bedfb353ddd0ec/src/BizHawk.Client.Common/tools/CheatList.cs#L257

...explain

Persists in 2.3.1. Easiest "solution" is to change [`When this is set, the client will receive user input even when focus is lost`](https://github.com/TASVideos/BizHawk/blob/4a6a6079b0206c326ee2f3e894a32d566a10ec2b/BizHawk.Client.EmuHawk/config/GuiOptions.Designer.cs#L219) to `When this is set, the client...

Not sure. You can definitely do it with a hack: overwrite `MainFormInputAllowedCallback` on the global `Input.Instance` (usually set once on program launch [here](https://github.com/TASVideos/BizHawk/blob/58aa64b5d603d3216a67a2bd38ada984b039ad45/src/BizHawk.Client.EmuHawk/MainForm.cs#L395)) to add `IExternalToolForm` to the allowlist ([here](https://github.com/TASVideos/BizHawk/blob/58aa64b5d603d3216a67a2bd38ada984b039ad45/src/BizHawk.Client.EmuHawk/MainForm.cs#L413)).