Hi bosh77, well I did like you said and I deleted the "settingsx.dat" files. Now it launch good. Moreover I confirm that all MSX1 programs do not run on BlueMSX MSX1 model. Example : DrawTextScreen5/drawtextscr5.rom on MSX1 ( Canon V-20 ) with VDP TMS99xx both Normal or MSX1 Project. It seems that examples are running well on MSX2 models but they bugs on MSX1 models. Another example : graphic.msxproj bugs on a MSX1.