sakaiza wrote:Ah, thanks That might be the problem... The pcb was sold with extra eproms which only change the game in japanese... I asked someone to erase this japanese version and to copy the american turbo one... Unfortunately,he gave me the turbo japanese one... So I have an american cps1 with 3 japanese eproms on it... I assumed that there is no way to change the region of a cps-1?
Not really, the Region is set by the main set of roms (see this pic, the roms highlighted in Blue);
Which will probably be Street Fighter II Champion Edition USA Roms.
And in that pic, the RED box shows 3 roms (You need to take off the top C Board to get to all 3 roms). Those are the Hyper Fighting Upgrade roms, if you take those 3 roms off, erase them and reburn the USA/World Hyper Fighting Roms it should fix the problem.
EDIT: What is the name of the Boxer (1st Boss) when you hover over him on the select screen?