nes
nes

Add NES system palette lookup for final RGB output.  Change the test pattern to cycle through the system palette.

[git-p4: depot-paths = "//depot/hw/nes/": change = 110]

brianbennett/fpga_nes,brianbennett/fpga_nes,brianbennett/fpga_nes,gtaylormb/fpga_nes,timofonic/fpga_nes,gtaylormb/fpga_nes,gtaylormb/fpga_nes,timofonic/fpga_nes,timofonic/fpga_nes