NES:Connector Pinouts

A/V Connector Pinout

Note: This connector is only available on the AV Famicom and a small handful of NES top loaders. It only carries composite video with dual mono audio, but does have the necessary pins present for S-video and RGBS outputs.

Main article:Nintendo Multi Out

Famicom Cartridge Pinout

Note: Pins 1 through 30 are towards the front and numbered from left to right. Pins 31 through 60 are towards the back and also numbered from left to right. This table is oriented so the front of the port is facing left.

Pin #	Name	Description	Pin #	Name	Description
1	GND		31	5V
2	CPU A11		32	M2	CPU clock output
3	CPU A10		33	CPU A12
4	CPU A9		34	CPU A13
5	CPU A8		35	CPU A14
6	CPU A7		36	CPU D7
7	CPU A6		37	CPU D6
8	CPU A5		38	CPU D5
9	CPU A4		39	CPU D4
10	CPU A3		40	CPU D3
11	CPU A2		41	CPU D2
12	CPU A1		42	CPU D1
13	CPU A0		43	CPU D0
14	CPU R/W		44	ROMSEL	Outputs the logical NAND gate of M2 and CPU A15
15	IRQ		45	2A03 Audio Input	Inputs audio from the Famicom into the cartridge
16	GND		46	Audio Output	Outputs mixed audio from the cartridge back into the Famicom
17	PPU Read		47	PPU Write
18	PPU RAM A10		48	CE	Connected to the PPU RAM
19	PPU A6		49	PPU A13
20	PPU A5		50	PPU A7
21	PPU A4		51	PPU A8
22	PPU A3		52	PPU A9
23	PPU A2		53	PPU A10
24	PPU A1		54	PPU A11
25	PPU A0		55	PPU A12
26	PPU D0		56	PPU A13
27	PPU D1		57	PPU D7
28	PPU D2		58	PPU D6
29	PPU D3		59	PPU D5
30	5V		60	PPU D4

Famicom Expansion Pinout

Note: Male is connector at the console. Female is connector at the controller. Diagram pictured is of the connector at the controller end.

Pin #	Description
1	GND
2	2A03 Audio Out (note that this does not carry cartridge audio)
3	IRQ
4	D4 Controller 2
5	D3 Controller 2
6	D2 Controller 2
7	D1 Controller 2
8	D0 Controller 2
9	Controller 2 OE
10	Digital Output 2
11	Digital Output 1
12	Digital Output 0
13	D1 Controller 1
14	Controller 1 OE
15	5V

NES Cartridge Port

Note: Pins 1 through 36 are on the top (front on the top loader) and numbered from left to right. Pins 37 through 72 are on the bottom (rear on the top loader) and also numbered from left to right. This table is oriented so the top of the port is facing left. Pins 16 through 19 and pins 52 through 55 are not physically present on the top loader.

An important thing to note about the NES cartridge port is that its pin pitch (the distance between pins) is actually 2.5 mm and is not the industry standard of 2.54 mm. Many clone consoles use the latter and tend to have connection problems because of this.

Pin #	Name	Description	Pin #	Name	Description
36	5V		72	GND
35	CIC to Motherboard (NES-001) / Unused (NES-101)		71	CIC Clock (NES-001) / PPU D4 (NES-101)
34	CIC to Cartridge (NES-001) / Unused (NES-101)		70	CIC Reset (NES-001) / 5V (NES-101)
33	PPU D3		69	PPU D4
32	PPU D2		68	PPU D5
31	PPU D1		67	PPU D6
30	PPU D0		66	PPU D7
29	PPU A0		65	PPU A13
28	PPU A1		64	PPU A12
27	PPU A2		63	PPU A10
26	PPU A3		62	PPU A11
25	PPU A4		61	PPU A9
24	PPU A5		60	PPU A8
23	PPU A6		59	PPU A7
22	PPU RAM A10		58	PPU A13
21	PPU Read		57	CE
20	EXP 4 (NES-001) / Unused (NES-101)	Pin 38 of expansion port	56	PPU Write
19	EXP 3	Pin 39 of expansion port	55	EXP 5	Pin 10 of expansion port
18	EXP 2	Pin 40 of expansion port	54	EXP 6	Pin 9 of expansion port
17	EXP 1	Pin 41 of expansion port	53	EXP 7	Pin 8 of expansion port
16	EXP 0	Pin 42 of expansion port	52	EXP 8	Pin 7 of expansion port
15	IRQ		51	EXP 9 (NES-001) / Unused (NES-101)	Pin 6 of expansion port
14	CPU R/W		50	ROMSEL	Outputs the logical NAND gate of M2 and CPU A15
13	CPU A0		49	CPU D0
12	CPU A1		48	CPU D1
11	CPU A2		47	CPU D2
10	CPU A3		46	CPU D3
9	CPU A4		45	CPU D4
8	CPU A5		44	CPU D5
7	CPU A6		43	CPU D6
6	CPU A7		42	CPU D7
5	CPU A8		41	CPU A14
4	CPU A9		40	CPU A13
3	CPU A10		39	CPU A12
2	CPU A11		38	M2	CPU clock output
1	GND		37	System Clock

NES Expansion Port

Note: This connector is only found on the original front loading NES.