x0x1x2x3 x4x5x6x7 x8x9xAxB xCxDxExF

| | | NES | SNES CPU | SNES APU | GameBoy | 65C02 | MC6809E

Note: RMBx, SMBx, BBRx, BBSx, WAI, and STP may be NOP in some revisions.