>>11854643
>>11854636

ignore what I said. L was supposed to be next disk so no idea why it does not work but pressing R worked.
I googled it and it says
>A,B Side Err. 07 = The wrong side of the disk inserted.

very strange.
Now the only problem is: WHY THE FUCK does none of the Roms from my complete rom set work or even load in retro Arsch