Saturn:Connector Pinouts

Controller Port

Console side is female, pins numbered left to right.

Pin	Name	Description
1	VCC	VCC
2	DOWN	Data 1
3	UP	Data 0
4	TH	Select 0
5	TR	Select 1
6	TL	(Held High)
7	RIGHT	Data 3
8	LEFT	Data 2
9	GND	Ground

A/V Out

CN5

Pin	Description
1	VCC
2	S. Right
3	S. Left
4	C. Sync
5	R
6	G
7	B
8	Video
9	Y
10	C

Communication Connector

CN6

Pin	Description
1	N/C
2	VCC
3	MIDIIN
4	MIDIOUT
5	MTxD
6	MRxD
7	MSCLK
8	GND
9	STxD
10	SRxD
11	SSCK
12	GND

Cartridge Input

A-side faces rear of console.

CN1

Pin	Name	Description	Pin	Name	Description
A1	VDD		B1	VDD
A2	VDD		B2	VDD
A3	SYSRES		B3	SSEL
A4	ISD		B4	DSD
A5	IBCK		B5	DBCK
A6	ILRCK		B6	DLRCK
A7	SCSPCLK		B7	GND
A8	GND		B8	GND
A9	EXBG0		B9	EXBG1
A10	EXBG2		B10	EXBG3
A11	EXBG4		B11	EXBG5
A12	EXBG6		B12	EXBG7
A13	GND		B13	GND
A14	EXBG8		B14	EXBG9
A15	EXBG10		B15	EXBG11
A16	EXBG12		B16	EXBG13
A17	EXBG14		B17	EXBG15
A18	GND		B18	GND
A19	EXBG16		B19	EXBG17
A20	EXBG18		B20	EXBG19
A21	EXBG20		B21	EXBG21
A22	EXBG22		B22	EXBG23
A23	GND		B23	GND
A24	EXON		B24	MPEGON
A25	EXLAI		B25	EXSL
A26	HSYNC		B26	VSYNC
A27	VDD		B27	VDD
A28	DOTCLK		B28	EXSYNC
A29	GND		B29	GND
A30	CRTG0		B30	CRTG1
A31	AA25		B31	AA24
A32	AA23		B32	AA22
A33	AA21		B33	AA20
A34	AA19		B34	AA18
A35	AA17		B35	AA16
A36	GND		B36	GND
Key
A37	AA15		B37	AA14
A38	AA12		B38	AA7
A39	AA13		B39	AA6
A40	AA8		B40	AA5
A41	GND		B41	GND
A42	AA9		B42	AA4
A43	AA11		B43	AA3
A44	AA10		B44	AA2
A45	AA1		B45	AA0
A46	GND		B46	GND
A47	ACS0		B47	ARD
A48	ACS2		B48	ACS1
A49	AWR0		B49	AWR1
A50	AFC0		B50	AFC1
A51	ATIM0		B51	ATIM1
A52	ATIM2		B52	AWAIT
A53	AAS		B53	AIRQ
A54	GND		B54	GND
A55	AD0		B55	AD7
A56	AD1		B56	AD6
A57	AD2		B57	AD5
A58	AD3		B58	AD4
A59	GND		B59	GND
A60	AD8		B60	AD15
A61	AD9		B61	AD14
A62	AD10		B62	A13
A63	AD11		B63	AD12
A64	GND		B64	GND
A65	GND		B65	GND
A66	COPRES		B66	MCLK
A67	VDD		B67	VDD

MPEG Card Slot

A-side bottom, faces main board.

CN11

Pin	Name	Description	Pin	Name	Description
A1	GND		B1	GND
A2	TIOCA1		B2	MAIRQ	MPEG Audio IRQ
A3	SRD		B3	MVIRQ	MPEG Video IRQ
A4	TIOCA0		B4	SWRL
A5	GND		B5	GND
A6	SA18		B6	SA17
A7	SA16		B7	SA15
A8	SA14		B8	SA13
A9	SA12		B9	SA11
A10	SA10		B10	SA9
A11	SA8		B11	SA7
A12	SA6		B12	SA5
A13	SA4		B13	SA3
A14	SA2		B14	SA1
A15	SA0		B15	GND
A16	GND		B16	GND
A17	SDL15		B17	SDL14
A18	SDL13		B18	SDL12
A19	SDL11		B19	SDL10
A20	SDL9		B20	SDL8
A21	SDL7		B21	SDL6
A22	SDL5		B22	SDL4
A23	SDL3		B23	SDL2
A24	SDL1		B24	SDL0
A25	GND		B25	GND
A26	MALRCLK		B26	SNDCLK
A27	MABICK		B27	MASDATA1
A28	VCCA		B28	VCCA
A29	GND		B29	GND
A30	MACS		B30	RESET
A31	SCS6		B31	GND
A32	WTRS		B32	FDACK
A33	GND		B33	GND
A34	MVCS		B34	MVR7
A35	MVR6		B35	MVR5
A36	MVR4		B36	MVR3
A37	MVR2		B37	MVR1
A38	MVR0		B38	MVG7
A39	MVG6		B39	MVG5
A40	MVG4		B40	MVG3
A41	MVG2		B41	MVG1
A42	MVG0		B42	MVB7
A43	MVB6		B43	MVB5
A44	MVB4		B44	MVB3
A45	MVB2		B45	MVB1
A46	MVB0		B46	MVPRT
A47	DOTCLK		B47	VOE
A48	HSYNC		B48	VSYNC
A49	VCCA		B49	VCCA
A50	GND		B50	GND