Hola, hace años que no emulo N64, aunque recuerdo que en Project 64, Super Mario 64 y de hecho el resto de juegos que probé, mostraban franjas negras, sin llegar a darme cuenta de que la versión Europea no tenía bordes, (creo que sólo jugué a la rom USA), en principio es extraño, lo normal como dices és que el juego ntsc sea el que no muestre bordes y el Pal si los tenga. ¿Has probado varias resoluciónes?, tal vez el motivo sea la emulación, te faltaría probar
UltraHLE o
MESS para confirmarlo, (el resto de emus son muy antiguos), en el FAQ de Project 64 explican esto acerca de los bordes
First, if the borders are in pairs, that is on the left AND the right and/or the top AND the bottom, especially if they are equal size, you do not have a problem and cannot and should not try to correct it. These games are designed this way, on a television you might not see it because of something called overscan (advanced users: you may be able to extend the viewable area by using the external geometry pipeline, however this often causes artifacts because you are seeing an area you are not meant to see plus there are the usual weaknesses of that pipeline). One unusual solution to this is to "simulate" overscan by adjusting the range on your monitor so the inside of the black border is sitting on your physical screen edge. You will probably want to pick a resolution that you don't normaly use so this is only used for Project64! This of course only works for fullscreen. We experimented with various methods of stretching the display to fill the area, but all caused too many problems and we decided to leave them out.
If the the border(s) are only on the right and/or bottom of the screen, or of mismatched size, then it's likely that the plugin has not detected the resolution of the game properly. Resolutions are calculated from the top left corner. The RDB should automatically handle any custom settings that are needed here for you, but if not advanced users can try adjusting emulated width and height via the video plugin ROM Settings tab. You may need to window switch (fullscreen<>windowed) to let changes take effect. 320x240 is a good starting point if you do not know the res and lowering numbers tends to shrink borders.
En 2002 y más tarde en 2006, cuando emulaba N64 con PJ64 en la TV, utilizaba
TV Tool (primero) y años más tarde
Powerstrip, dos programas que realizan ajustes en la imágen tales como desplazarla, extenderla o disminuirla en las cuatro direcciones todo lo que se quiera, con un margen de acción mucho más amplio que el ofrecido por el menú de la tarjeta gráfica, es una solución artificial pero nos libran de los indeseados bordes 'Capcomnianos'.
Saludos
