Master System Card
From HwB
Available at Sega Master System.
Pinout
| Pin | Dir | Name | Description |
|---|---|---|---|
| 1 | ? NC | ? | |
2 !! ?  |
Wr* | ? Write | |
| 3 | ? | M Req | ? Memory Request |
| 4 | ? |
Rd* | ? Read |
| 5 | ? | M8-B | Memory 8000-BFFF |
| 6 | |
A14 | Address bit14 |
| 7 | |
A13 | Address bit13 |
| 8 | |
A8 | Address bit8 |
| 9 | |
A9 | Address bit9 |
| 10 | |
A11 | Address bit11 |
| 11 | ? | M0-7 | Memory 0000-7FFF |
| 12 | |
A10 | Address bit10 |
| 13 | NC | (to Sega 315-5216 IC) | |
| 14 |  |
D7 | Data bit7 |
| 15 | |
D6 | Data bit6 |
| 16 | |
D5 | Data bit5 |
| 17 | |
D4 | Data bit4 |
| 18 | |
D3 | Data bit3 |
| 19 |  |
GND | Ground |
| 20 | |
GND | Ground |
| 21 | |
GND | Ground |
| 22 | |
D2 | Data bit2 |
| 23 | |
D1 | Data bit1 |
| 24 | |
D0 | Data bit0 |
| 25 | |
A0 | Address bit0 |
| 26 | |
A1 | Address bit1 |
| 27 | |
A2 | Address bit2 |
| 28 | |
A3 | Address bit3 |
| 29 | |
A4 | Address bit4 |
| 30 | |
A5 | Address bit5 |
| 31 | |
A6 | Address bit6 |
| 32 | |
A7 | Address bit7 |
| 33 | |
A12 | Address bit12 |
| 34 | ? | ? | ? (same as pin#34 on cartridges) |
| 35 | |
+5V | Power +5V |
Note: Direction is Console relative Cartridge
Compatibility
Sega Master System II doesn't have this card slot. Some old card games were converted into cartridge games.
Capacity is 256Kb (32KB).