Changes
/* TODO : an OSD option to enable scan-doubler */
r005 : VGA 60H/TV 50Hz.
==== TODO DONE : an OSD option to enable scan-doubler ====
scan-doubler (simple TV to VGA converter) doesn't run ok in mode 2, but there is some many recent demo effect that doesn't pass using current VGA 72Hz implementation. Have to try to insert both VGA implementations.