Besides the input lag and other various problems with emulation, you wouldnt want to do a hacked xbox 1 to jamma for emulated games like nes/snes/gen etc because the lowest resolution an XBOX will do is 480i. Everything is interpolated, filtered, etc.
For those systems you want the lo-res 15khz RGB.
EDIT:
And what i mean by this is you want the NON interlaced 15khz RGB. In general, you want the system you are emulating, to at least support the same video modes as the original system.
Resolutions
Progressive: 256 × 224, 512 × 224, 256 × 239, 512 × 239
Interlaced: 512 × 448, 512 × 478
And for nes, 256x224
NOT the xbox 1 640x480p/i
Regarding the jamma nes: Close.
The PPU on the playchoice and some VS games are almost 100% identical...
Quoting from Quietust over at nesdev,
"The PlayChoice-10 does use the same palette, mostly - it is missing the grays at $1D/$2D/$3D, and color emphasis works completely differently, forcing each channel to maximum intensity (which can cause problems in some games which set all 3 bits, expecting to dim the screen by 25% but instead resulting in a solid white screen)."
The amount of times you would ever run into that would close to never.
Any perceived difference in color is due to NTSC's poor representation of that color, not because the palette is different.
RGB modding a nes isnt as hard as people make it out to be, nor as expensive.
yes you need that PPU, but acquiring one from a broken pc10, or even VS tennis (which will give you 2 of them btw) is ~50 or less.
-Desolder the old ppu
-Put in a socket, lift the RGB legs
-Put in PC10 ppu
-Buy/BUILD RGB amp and run RGB lines through it
-Close nes and enjoy
If you want them to work with a USB powerpak, depending on your nes revision, some work is needed.
Yes the Sharp Titler's PPU's palette is a little dif from PC10/nes, and overall more expensive than modding one yourself.
