Processors used in game consoles

1st
Used Discreet logic and analog circuitry, not integrated circuits or microprocessors!

2nd
MOS Technology 6507		Atari 2600
Custom MOS 6502C		Atari 5200
Zilog Z-80A			ColecoVision
Fairchild F8			Fairchild Channel F
Intel 8048			Magnavox Odyssey²
General Instrument CP1610	Mattel Intellivision

3rd
MOS Technology 6502C		Atari 7800
Ricoh 2A03 (based on MOS 6502)	Nintendo Entertainment System
NEC 780C (Zilog Z-80 clone)	Sega SG-1000
NEC 780C (Zilog Z-80 clone)	Sega Master System

4th
HuC6280A (Modified 65SC02)	TurboGrafx-16
HuC6280A (Modified 65SC02)	Turbo Duo
HuC6280 (Modified 65SC02)	TurboExpress
MOS Technology 6502		Atari Lynx
Motorola 68000 AND Zilog Z-80	Neo Geo AES
TMP68HC000 (Motorola 68000)	Neo Geo CD
Sharp LR35902 (close to 8080!)	Nintendo GameBoy
Ricoh 5A22 (modified 65C816)	SNES
Zilog Z-80 (close to 8080!)	Sega GameGear
Motorola 68000			Sega Genesis/CD/Nomad
Hitachi SuperH SH-2 (x2!)	Sega 32X
Various, module-based		Pioneer Laseractive
Philips 68070			Philips CD-I

5th
ARM60				3DO Interactive Multiplayer
Motorola 68000	(x2)		Atari Jaguar
SPGY-1002/SPGY-1003/NEC V30MZ	Bandai WonderSwan Colour
Toshiba TLCS900H		Neo Geo Pocket Colour
NEC VR4300 (MIPS 4200i)		Nintendo N64
Sharp LR35902 (mod. Z-80/8080!)	Nintendo GameBoy Colour
NEC V810 (NVC, P/N uPD70732)	Nintendo VirtualBoy
Hitachi SuperH-2 7604 (x2)	Sega Saturn
MIPS R3000A			Sony PlayStation

6th
ARM7TDMI 			Nintendo GameBoy Advance
IBM PowerPC Gekko		Nintendo GameCube
Hitachi SuperH SH-4		Sega Dreamcast
MIPS Emotion Engine		Sony PlayStation 2
MIPS32 R4000-based (x2)		Sony PlayStation Portable

7th
IBM PowerPC Xenon		Microsoft Xbox 360
IBM PowerPC Broadway		Nintendo Wii
ARM946E-S/ARM7TDMI		Nintendo DS
ARM7 and ARM9			Nintendo DSi
Cell (PPC64) + Emotion Engine	Sony PlayStation 3

8th
Intel x86_64			Sony PlayStation 4
Intel x86_64			Microsoft Xbox One
IBM PowerPC Espresso		Nintendo Wii U
ARM11 MPCore			Nintendo 3DS
ARM Cortex-A9 MPCore		Sony PlayStation Vita