r5592 /src/mess/drivers/x1.c: [X1]: fixed PCG-based colors

Actually a rather stupid bug, I was using the wrong color bank for whatever reason...

http://mamedev.emulab.it/kale/fast/files/0304.png

http://mamedev.emulab.it/kale/fast/files/0306.png

http://mamedev.emulab.it/kale/fast/files/0307.png

http://mamedev.emulab.it/kale/fast/files/0308_909981393.png

(and yes, the black pen thing in Super Mario Bros. SP is now fixed wink )