Gamepad Pinout
The Genesis / Megadrive gamepads (3 button and 6 button) use a standard DB-9 connector. Looking into the connector, the signals are as follows:
| Pin # | Signal Name | | 1 | D0 | | 2 | D1 | | 3 | D2 | | 4 | D3 | | 5 | +5V | | 6 | D4 | | 7 | Select | | 8 | GND | | 9 | D5 |
Cartridge PinoutRow A is the rear row, row B is the front row. Position A1 is to the rear and left, position B32 is in the front and right. Remember that a 16-bit system does not have an Address 0 line. | Pos | Name | Pos | Name | | A1 | GND | B1 | Sound Left | | A2 | VCC | B2 | #H_RESET | | A3 | Address 8 | B3 | Sound Right | | A4 | Address 11 | B4 | Address 9 | | A5 | Address 7 | B5 | Address 10 | | A6 | Address 12 | B6 | Address 18 | | A7 | Address 6 | B7 | Address 19 | | A8 | Address 13 | B8 | Address 20 | | A9 | Address 5 | B9 | Address 21 | | A10 | Address 14 | B10 | Address 22 | | A11 | Address 4 | B11 | Address 23 | | A12 | Address 15 | B12 | VIDEO | | A13 | Address 3 | B13 | VSYNC | | A14 | Address 16 | B14 | HSYNC | | A15 | Address 2 | B15 | HS_CLK (53.693175Mhz) | | A16 | Address 17 | B16 | #OE | | A17 | Address 1 | B17 | #CE | | A18 | GND | B18 | #AS | | A19 | Data 7 | B19 | CLK (7.67Mhz) | | A20 | Data 0 | B20 | #DTACK | | A21 | Data 8 | B21 | #CAS | | A22 | Data 6 | B22 | Data 15 | | A23 | Data 1 | B23 | Data 14 | | A24 | Data 9 | B24 | Data 13 | | A25 | Data 5 | B25 | Data 12 | | A26 | Data 2 | B26 | #LO_MEM | | A27 | Data 10 | B27 | #RESET | | A28 | Data 4 | B28 | #LDSW | | A29 | Data 3 | B29 | #UDSW | | A30 | Data 11 | B30 | #M3 | | A31 | VCC | B31 | #TIME | | A32 | GND | B32 | #CART_IN
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