+ 256-Color Shift Mode Diagram (Right)
+ -----------------------------------
+
+ Plane 3 Plane 2 Plane 1 Plane 0
+ 7654 3210 7654 3210 7654 3210 7654 3210 Carried
+ 0000 1111 0000 1111 0000 1111 0000 1111 From Prev
+ | | | | | | | | |
+ | | | | | | | 1111 XXXX
+ | | | | | | 0000 1111 0
+ | | | | | 1111 0000 1
+ | | | | 0000 1111 2
+ | | | 1111 0000 3
+ | | 0000 1111 4
+ | 1111 0000 5
+ 0000 1111 6
+ | 7
+ Carried
+ To Next