“@trixster: funny thing is that those tweaked vertical parameters are somewhat invalid as I noted in a follow-up post, and I think on older firmwares that would have resulted to DE being active during VSYNC. While you had it working, did the TV report the mode as 576p or 800×600?”
Sorry I missed your reply! With the GT50 and 0.76 the TV displays 576p when running PAL PS1 games. The OSSC displays 314p 15.62kHz 49.76Hz.
With 0.77 and 0.78 i cannot get the tv to display PAL games at all.