Timing hack for Metal Gear Solid

[CometHunter92]

Metal Gear Solid stutters during the cutscenes (notably in the heliport). A cpu clock value of "85" seems to fix the NTSC-U version, while the PAL still stutters.

[notaz]

This seems a bit much, real hardware is unlikely to reach such speeds so this may break the game at some point. There is likely some unrelated issue for the slowdown, especially if this change doesn't help the PAL version. How much have you tested this?

[CometHunter92]

I was on a full playthrough right now, but you're right, I guess this is not the right way to fix it. I just noticed that the boot now took about 30s seconds, so there is definitely something not right. BTW with that clock speed no more stutters so far. Stutters are not "slowdowns" but there are like a momentary "hang" where a disc appear (?), I've never seen anything like this before, it's like is caching from the CD. I'll attach a screenshot and a savestate just before the heliport cutscene. It's not device or SD related, it happens on different platforms at the same points (tested on a Pi4 64 and a bunch of retrohandhelds).

Metal Gear Solid (USA).zip

[notaz]

Stutters are not "slowdowns" but there are like a momentary "hang" where a disc appear (?)

That sounds very much like a cdrom timing issue and should be fixed there instead. I'll look at it later.

[CometHunter92]

That sounds very much like a cdrom timing issue and should be fixed there instead. I'll look at it later.

Thanks, sorry for any inconvenience.