Changes
/* TODO : 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.
core_r005c18 seems having a scan-doubler output, have to merge it.
==== DONE : A SCART output with border ====
