SG-1000 Cartridge
From HwB
Available at Sega SG-1000, SC-3000 & Master System (Japanese & Korean),
Pinout
Front B1 B22
====================== (at Cartridge)
Back A1 A22
Back A1 A22
====================== (at Console)
Front B1 B22
| Pin | Dir | Name | Description |
|---|---|---|---|
| A1 |  |
A0 | Address bit0 |
| A2 | |
A1 | Address bit1 |
| A3 | |
A2 | Address bit2 |
| A4 | |
A3 | Address bit3 |
| A5 | |
A4 | Address bit4 |
| A6 | |
A5 | Address bit5 |
| A7 | |
A6 | Address bit6 |
| A8 | |
A7 | Address bit7 |
| A9 | |
A8 | Address bit8 |
| A10 | |
A9 | Address bit9 |
| A11 | |
A10 | Address bit10 |
| A12 | |
A11 | Address bit11 |
| A13 | |
A12 | Address bit12 |
| A14 | |
A13 | Address bit13 |
| A15 |  |
D0 | Data bit0 |
| A16 | |
D1 | Data bit1 |
| A17 | |
D2 | Data bit2 |
| A18 | |
D3 | Data bit3 |
| A19 | |
D4 | Data bit4 |
| A20 | |
D5 | Data bit5 |
| A21 | |
D6 | Data bit6 |
| A22 | |
D7 | Data bit7 |
| B1 | |
+5V | Power +5V |
| B2 | |
/CSCN4 | Power +5V |
| B3 | ? | /CSRAM | ? |
| B4 | ? | /EXM1 | Memory 8000-BFFF |
| B5 | ? |
/RD | Read |
| B6 | ? |
/WR | Write |
| B7 | ? | /IORD | I/O Read |
| B8 | ? | /IOWR | I/O Write |
| B9 | ? | /RFSH | Refresh |
| B10 | ? | /MREQ | ? Cartridge Output Enable |
| B11 | ? | /CONT | ? |
| B12 | ? | /RAS0 | ? |
| B13 | ? | /CAS0 | ? |
| B14 | ? | CA7 | ? |
| B15 | ? | /RAS1 | ? |
| B16 | ? | /CAS1 | ? |
| B17 | ? | /RCSEL | ? |
| B18 | |
A14 | Address bit14 |
| B19 | |
A15 | Address bit15 |
| B20 | ? | /EXM2 | Memory 0000-7FFF ? |
| B21 |  |
GND | Ground |
| B22 | |
GND | Ground |
Note: Direction is Console relative Cartridge
Compatibility
Note:
- Japanese and South Korean consoles use 44-pin cartridges, same shape as Mark I and Mark II
- All other consoles use 50-pin cartridges with a different shape
- The difference in cartridge style is a form of regional lockout
