thx for your answere
i have readed that i need a fex file for legacy kernel
me spend many time to find out the right settings in fex and now i have a workes fex file with all features!
On my board i have on ram and soc good heatsinks with Thermal Grease (CM IC Essential E1) and a pi-fan with the new fex run it @ 40-45°c on fire
the cpu speed issue is fixed, now change the board the speed form 408Mhz up to 1200Mhz, tested with many PSP, PSX and Dreamcast games without issues or hang ups
the performance is like a orange pi pc
himself is the nerd