On a Un-MechaPwn'd console you can use PS1VModeNeg to fix that.
No idea if it works with MechaPwn, or if it's even necessary.
That's not what he's talking about. PAL Playstation 1 consoles set to run in NTSC video modes run just slightly too slow. He wants to know if the same slight timing inaccuracy is also true on the PS2.
This is a bit of a stretch, but does anyone have an OSSC and can comment if a PAL to NTSC region changed PS2 running a PS1 game outputs a proper 59.94 Hz signal or if it's still the slower PAL 59.20 Hz signal, like on modded PAL PS1 without DFO mod?
I don't own an OSSC - but I do recall that when trying to play NTSC games on my PAL PS1, there was a slowly scrolling "frame tear" effect on my LCD TV. I am almost certain that this is a result of the slight desynchronization between the console and the television which expected a correctly timed NTSC signal.
I will try to run a PS1 NTSC game on PS1 and on PS2 - if I see the frame tear effect on PS1 but not on PS2, that should clarify whether or not the PS2 is outputting a correct NTSC signal.