SG-1000:Connector Pinouts

From ConsoleMods Wiki
Jump to navigation Jump to search

Cartridge Port

Note: Pins A1 through A22 are towards the back and numbered from left to right, B1 through B22 are towards the front and also numbered from left to right. On the SC-3000, A1 through A22 are towards the bottom and B1 through B22 are towards the top.

Pin # Description Pin # Description
A1 A0 B1 5V
A2 A1 B2 5V
A3 A2 B3 !OSRAM (SG-1000 and SC-3000) / !CSRAM (SG-1000 II)
A4 A3 B4 !EXM1 (SG-1000 and SG-1000 II) / !CEROM (SC-3000)
A5 A4 B5 !RD (SG-1000 and SG-1000 II) / !MEMR (SC-3000)
A6 A5 B6 !WR (SG-1000 and SG-1000 II) / !MEMW (SC-3000)
A7 A6 B7 Unused (SG-1000 and SG-1000 II) / I/O R (SC-3000)
A8 A7 B8 Unused (SG-1000 and SG-1000 II) / I/O W (SC-3000)
A9 A8 B9 !RFSH (SG-1000) / Unused (SC-3000 and SG-1000 II)
A10 A9 B10 !MREQ
A11 A10 B11 CONT
A12 A11 B12 Unused (SG-1000 and SG-1000 II) / !RAS1 (SC-3000)
A13 A12 B13 Unused (SG-1000 and SG-1000 II) / !CAS1 (SC-3000)
A14 A13 B14 Unused (SG-1000 and SG-1000 II) / RAM A7 (SC-3000)
A15 D0 B15 Unused (SG-1000 and SG-1000 II) / !RAS2 (SC-3000)
A16 D1 B16 Unused (SG-1000 and SG-1000 II) / !CAS2 (SC-3000)
A17 D2 B17 Unused (SG-1000 and SG-1000 II) / !MUX (SC-3000)
A18 D3 B18 A14
A19 D4 B19 !EXM2 (SG-1000 and SG-1000 II) / A15 (SC-3000)
A20 D5 B20 !M1 (SG-1000) / Unused (SC-3000 and SG-1000 II)
A21 D6 B21 Ground
A22 D7 B22 Ground

Controller Port

Note: Female is connector at the console. Male is connector at the controller. Diagram pictured is of the connector at the controller end. This pinout is mostly identical to the later Sega Master System and Mark III.

DB9 Female.svg
Pin # Description
1 Up
2 Down
3 Left
4 Right
5 Unused
6 Button 1
7 Ground (console side only on SG-1000 and SG-1000 II) / Unused (SC-3000 only)
8 Ground
9 Button 2

Expansion Port

This expansion port is only found on the SG-1000, SG-1000 II and Othello Multivision consoles.

Note: Pins are numbered from left to right with the edge of the connector facing forward.

Pin # Description
1 Ground
2 Ground
3 Ground
4 Ground
5 A2
6 Unused
7 IOREQ
8 CONT
9 Write
10 Read
11 KBSEL
12 D7
13 D6
14 D5
15 D4
16 D3
17 D2
18 D1
19 D0
20 A1
21 A0
22 Unused
23 5V
24 5V

SC-3000 Monitor Out

Note: Female connector is pictured. The same pinout is also used on the Master System and Genesis/Mega Drive.

5pindinnumbered.png
Pin # Description
1 Composite Video Out
2 Ground
3 Audio Out
4 Unused
5 Unused


Yeno SC-3000 Monitor Out

Note: Female connector is pictured.

8pindin270.png
Pin # Description
1 Composite Sync
2 Ground
3 Audio Out
4 Vertical Sync
5 Horizontal Sync
6 Green
7 Blue
8 Red