Sega Mega Drive Clone - Region Switch Mod

[sdm]

I have a Sega Mega Drive "MEGAGAME" clone. I wonder if it is possible to install a PAL / NTSC switch? I found three pins "J1" marked P and N (Pal / Ntsc?), But I'm not sure if they are responsible for changing the region. Has anyone had / has such a clone and knows anything more about it?

Video:
https://www.youtube.com/watch?v=NBiySZepNdQ

I wonder why the original Aladdin PAL does not work and displays the message "developed for use only with PAL & French Secam Mega Drive Systems", while Aladdin NTSC (USA) displays "developed for use only with NTSC genesis Systems" (which is logical, because the console is the PAL version). Two other PAL games I have, The Lion King and Sonic 1, are working.

[TmEE]

J3 is video output 50/60Hz setting
J1 is Region register PAL/NTSC setting (has nothing to do with video output)
Japan/Export is unavailable, but it is done by PCS8492 pin 72 (GND=Japan, VCC=Export).

VDP (PCS8391) seems to be a bit modified compared to normal superclone VDP, it seems to take a crystal instead of oscillator and there are those JS0...3 jumpers which function I do not know.

[sdm]

Thanks. I'll check these jumpers.

[TmEE]

With luck, SW4 in top right corner connects to the JP/EN pin, in some machines that is where region setting switches are exposed.