Fix will be something like --fpu-accurate-range=0x100008,0x600000
Yes. Exactly.
Excellent news! As you probably imagined, your advice worked perfectly! --fpu-accurate-range=0x100008,0x600000 definitely works, but regrettably, the game is painfully slow (As you mentioned it would be), however, it's really bad in this case because the next closest save is blocked until you finish a tedious puzzle (on the floor the ladder takes you down); What normally would have taken 10-15 minutes tops has been like 2-3 hours, it's that rough.
There is no better method. Maybe if game have debug symbols, then you can try to search by name for related function. Halving range is what i usually do. In some rare situations you can find out that both values that you got after split range are not working. This is usually good info, because it mean that correct offset is somewhere in the middle.
Nice work! My only suggestion that i forgot mention earlier is to use 0,4,8, or C at end of address. Because mips instructions are 32 bits long, they always start at 0xYYYYYX where X is 0,4,8, or C. In way you did it is possible that instructions at 0x137758 - 0x138010 are ignored. So i suggest to edit it to --fpu-accurate-range=0x137754,0x138014 to make it more clean.
About config you posted, --fpu-accurate-range seems to be commented there. I think that's just mistake.
One more thing i want to mention, fix like that is region dependent. So if you used US release, offsets for JPN release will be different.
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No really need to turn off commands like that. Only bad thing that can happen with improved accuracy is slow down. Since you narrowed responsible offset to very small range, should be fine to keep that command turned on thru full game. That's what emulator developers do on PS3, and PS4.
I don't think that something like that will be ever possible, maybe for some small set of commands that read every some number of cycles. But for commands that are set permanently at start is not even possible.
I would love to contribute more & in bigger ways to scenes like that, but I don't have the motivation to do anything programming related (or much else in general) unless there will be a practical use in the foreseeable future (IE:I taught myself basic hex editing because I corrupted a save file for a multi discs psx game once, so I had to modify the values for 50+ cheat codes to precisely recreate my actual setup on someone else's save). Working on something basic like HTML, while a good starting place for a programming newbie, does not interest me nor would I be able to do much else with t besides use it as a stepping stone; Homebrew development would be far more relevant & satisfying to work with and might just be what I would need to motivate me, but perhaps I can't take it on until I have a solid understanding of the easier languages.
Anyways, thank you again for your time and assistance
