In your case, 47 shows everything but about 75%
of the right-most pixel.
The Framemeister wouldn't let me custom-define
the masking down
to the perfect pixel, so that was
the best compromise (believe me I tried). If you want
to experiment with how much masking is applied on
the horizontal axis, what you'll need
to do is go into
the Visual_Set options and adjust H_Width. This will reveal more or less
of the horizontal overscan depending on which direction you adjust
the value
to. Just remember that changing
the H-Width in Visual_Set means you then have
to adjust
the Zoom_H_Width
to re-correct
the aspect ratio. Also adjusting Visual_Set H_Width will throw
the H_Position off, so you'll have
to correct for that as well.
Edit:
I broke back out my Genesis and checked this, and no, you don't want
to mess with
the current mask setting. Even going one digit lower on
the Visual_Set H_Width throws everything out
of wack, and it reveals overscan anyway.
The current value
of 34 is as good as it gets. However, on my set, it's perfectly balanced with
the Zoom_H_Position at default
of 50.
I'd suggest you try a value
of 48
to see if it's any more balanced than 47. If it isn't, then
I'd recommend sticking with 47.
Also for
the record, this appears
to be
the 5x profiles you're using.
Edit 2:
Also make sure for 256 mode games, you use
the 256 profiles. I assume that you are, but I wasn't sure about
the Radical Rex comment.
Edit 3:
I took a picture
of the game live on my LCD screen
to show how
the default 50 Zoom_H_Position looks on
the 5x 320 profile:
You can see both edges just barely cut into
the active pixels. That as close as it will get I'm afraid.