i have no problem running psx games but when i run a n64 game the whole thing is white except for some models which are white with shine and the paddles which are purple squares and the balls which are sprites and normal color (im talking about mario tennis)
The problem is "what ever onboard is stand. in an hp pavilion 6830", try using Glide64 + Evoodoo which tends to work really well with what I am going to assume is an Intel 810 chipset.
The N64 is more complicated to emulate than the PSX, that I know - the reasons? Not 100% sure, though I'm sure some techy types will probably furnish you with that detail later.