g400_crtc2_set_display_start
g400_crtc2_set_display_start(startadd_right,colour_depth2);
g400_crtc2_set_display_start(startadd,colour_depth2);
g400_crtc2_set_display_start(startadd_right,colour_depth);
g400_crtc2_set_display_start(startadd,colour_depth);
status_t g400_crtc2_set_display_start(uint32 startadd,uint8 bpp);