at first thanks a lot for your reply.
The game “Fix it Felix” is bought over itch.io, but i can send you a link to some demos that are’nt working as well in my current configuration (csdb.db).
On Amazon I have found this: https://www.amazon.de/s?k=Usb-Blaster-Kabel-CPLD-Programmierer-Altera&__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&ref=nb_sb_noss
Is this suitable for programming the FPGA Firmware?
In the docu of the C64 S-Video Bypass/RF Replacement – DIY Kit (I have already ordered one) I have seen that you have to ground the PCB on the motherboard beside the ground that it already has over the 2x 4-pin socketing on the mainboard.
Do I have to ground the Video-Enhancement PCB the same way as it is shown in the docu for the S-Video-Bypass-PCB?
Andi from Berlin