Started improving the dataeast games flipscreen problems: (nw)
*fixed MT04987, MT04942;
*partially fixed MT04897: screen flips now and seems to work fine in actfancr, triothep background doesn't scroll, though
*partially fixed MT04724: screen flips now. BG offset as in MT04797, these are caused by the addition of the SCREEN_RAW_PARAMS which hasn't been accounted in the decbac device flip routines. All drivers using this device must be updated to SCREEN_RAW_PARAMS or a workaround must be added in the device emulation.
Hopefully more to come.