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Mega Drive Cartridge

B1                    B32  Front
=========================
A1                    A32  Back

Pin Direction Name Description
A1 --- GND Ground
A2 --> +5V Power +5V
A3 --> A8 Address bit8
A4 --> A11 Address bit11
A5 --> A7 Address bit7
A6 --> A12 Address bit12
A7 --> A6 Address bit6
A8 --> A13 Address bit13
A9 --> A5 Address bit5
A10 --> A14 Address bit14
A11 --> A4 Address bit4
A12 --> A15 Address bit15
A13 --> A3 Address bit3
A14 --> A16 Address bit16
A15 --> A2 Address bit2
A16 --> A17 Address bit17
A17 --> A1 Address bit1
A18 --- GND Ground
A19 <-> D7 Data bit7
A20 <-> D0 Data bit0
A21 <-> D8 Data bit8
A22 <-> D6 Data bit6
A23 <-> D1 Data bit1
A24 <-> D9 Data bit9
A25 <-> D5 Data bit5
A26 <-> D2 Data bit2
A27 <-> D10 Data bit10
A28 <-> D4 Data bit4
A29 <-> D3 Data bit3
A30 <-> D11 Data bit11
A31 --> +5V Power +5V
A32 --- GND Ground
Pin Direction Name Description
B1 --> laudio left audio input
B2 <-- H_RESET ?
B3 --> raudio right audio input
B4 --> A9 Address bit9
B5 --> A10 Address bit10
B6 --> A18 Address bit18
B7 --> A19 Address bit19
B8 --> A20 Address bit20
B9 --> A21 Address bit21
B10 --> A22 Address bit22
B11 --> A23 Address bit23
B12 --> VIDEO ?
B13 --> VSYNC ?
B14 --> HSYNC ?
B15 --> HS_CLK ?
B16 --> C_OE Chip Output Enable
B17 --> C_CE ?
B18 --> AS Address Strobe
B19 --> CLK Clock
B20 <-- DTACK ?
B21 --> ? ?
B22 <-> D15 Data bit15
B23 <-> D14 Data bit14
B24 <-> D13 Data bit13
B25 <-> D12 Data bit12
B26 --> LO_MEM ?
B27 --> RESET Reset
B28 --> LDSW even words of SRAM
B29 --> UDSW odd words of SRAM
B30 <-- S_RESET ?
B31 --> ? phantom address line
B32 <-- CART_IN ?

Note: Direction is Console relative Cartridge

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