[Core/SCD] minor CDD emulation fixes
[Core/SCD] minor CDD emulation fixes

Gamer125/genplus-gx,gdos/genplus-gx,Gamer125/genplus-gx,tectronics/genplus-gx,uraran/genplus-gx,tectronics/genplus-gx,tectronics/genplus-gx,uraran/genplus-gx,Gamer125/genplus-gx,gdos/genplus-gx,tectronics/genplus-gx,gdos/genplus-gx,uraran/genplus-gx,uraran/genplus-gx,gdos/genplus-gx,Gamer125/genplus-gx