I know a NTSC nintendo 64 can be modified to enable rgb output, detailed here:
http://www.gamesx.com/rgbadd/rgbn64.htm (http://www.gamesx.com/rgbadd/rgbn64.htm)
But is there a way to enable this on a PAL n64 ?
Only the first PAL french N64.
As for the Euro Consoles, you need a N64color Kit from DoubleYou, but unfortunately it is out of print and DoubleYou don`t have diagrams or the software for the MACH211 logic IC, because they sold all Kits and Schematics to www.wolfsoft.de
:-(
Bye Markus