Sega Mega-Tech Pinout.
Overview
Wiring Harness
Credit to: Kevin Eshbach
Connector CN1 (Lamp)
Use Molex 12 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
I.1
|
| 2 |
I.2
|
| 3 |
I.3
|
| 4 |
I.4
|
| 5 |
N/C
|
| 6 |
N/C
|
| 7 |
N/C
|
| 8 |
N/C
|
| 9 |
N/C
|
| 10 |
N/C
|
| 11 |
N/C
|
| 12 |
N/C
|
Connector CN2 (Select)
Use Molex 25 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
Select *
|
| 2 |
N/C
|
| 3 |
N/C
|
| 4 |
N/C
|
| 5 |
Door SW 1
|
| 6 |
Door SW 2
|
| 7 |
N/C
|
| 8 |
Test
|
| 9 |
A.1
|
| 10 |
A.2
|
| 11 |
A.3
|
| 12 |
A.4
|
| 13 |
Service
|
| 14 |
Enter
|
| 15 |
+5VDC
|
| 16 |
+5VDC
|
| 17 |
N/C
|
| 18 |
Coin Meter
|
| 19 |
N/C
|
| 20 |
Ground
|
| 21 |
Ground
|
| 22 |
Ground
|
| 23 |
Ground
|
| 24 |
Ground
|
| 25 |
Com A
|
Connector CN3 (Sound)
Use Molex 4 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
Left Speaker (+)
|
| 2 |
Left Speaker (-)
|
| 3 |
Right Speaker (+)
|
| 4 |
Left Speaker (-)
|
Connector CN4 (1P)
Use Molex 10 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
1P Up*
|
| 2 |
1P Down*
|
| 3 |
1P Left*
|
| 4 |
1P Right*
|
| 5 |
1P Shot 1*
|
| 6 |
1P Shot 2*
|
| 7 |
1P Shot 3*
|
| 8 |
1P Start*
|
| 9 |
Ground
|
| 10 |
Ground
|
- Wired as NO (Normally Open)
Connector CN5 (Gun)
Use Molex 21 Pin 0.100" Header.
Note: Pinout unknown as Sega never released a gun or gun games for this platform.
| Pin
|
Definition
|
| 1 |
|
| 2 |
|
| 3 |
|
| 4 |
|
| 6 |
|
| 7 |
|
| 8 |
|
| 9 |
|
| 10 |
|
| 11 |
|
| 12 |
|
| 13 |
|
| 14 |
|
| 15 |
|
| 16 |
|
| 17 |
|
| 18 |
|
| 19 |
|
| 20 |
|
| 21
|
Connector CN6 (Power)
Use Molex 14 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
+5VDC
|
| 2 |
+5VDC
|
| 3 |
+5VDC
|
| 4 |
+5VDC
|
| 6 |
N/C
|
| 7 |
Ground
|
| 8 |
Ground
|
| 9 |
Ground
|
| 10 |
Ground
|
| 11 |
Ground
|
| 12 |
N/C
|
| 13 |
+12VDC
|
| 14 |
+12VDC
|
Connector CN7 (2P)
Use Molex 11 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
2P Up*
|
| 2 |
2P Down*
|
| 3 |
2P Left*
|
| 4 |
2P Right*
|
| 5 |
2P Shot 1*
|
| 6 |
2P Shot 2*
|
| 7 |
2P Shot 3*
|
| 8 |
2P Start*
|
| 9 |
Ground
|
| 10 |
Ground
|
- Wired as NO (Normally Open)
Connector CN8 (RGB1) - Main Monitor
Use Molex 6 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
Video Red (+)
|
| 2 |
Video Green (+)
|
| 3 |
Video Blue (+)
|
| 4 |
Video Sync (-)
|
| 5 |
Ground
|
| 6 |
N/C
|
Connector CN9 (RGB2) - Secondary Monitor
Use Molex 5 Pin 0.100" Header.
| Pin
|
Definition
|
| 1 |
Video Red (+)
|
| 2 |
Video Green (+)
|
| 3 |
Video Blue (+)
|
| 4 |
Video Sync (-)
|
| 5 |
Ground
|
Game Slots
Credit to: Nipedley[1]
| Pin |
Function |
Pin |
Function
|
| A1 |
GND |
B1 |
NC
|
| A2 |
VCC |
B2 |
H_RESET
|
| A3 |
A7 |
B3 |
NC
|
| A4 |
A10 |
B4 |
A8
|
| A5 |
A6 |
B5 |
A9
|
| A6 |
A11 |
B6 |
A17
|
| A7 |
A5 |
B7 |
A18
|
| A8 |
A12 |
B8 |
A19
|
| A9 |
A4 |
B9 |
A20
|
| A10 |
A13 |
B10 |
A21
|
| A11 |
A3 |
B11 |
A22
|
| A12 |
A14 |
B12 |
NC
|
| A13 |
A2 |
B13 |
NC
|
| A14 |
A15 |
B14 |
/OE (MENU)
|
| A15 |
A1 |
B15 |
NC
|
| A16 |
A16 |
B16 |
/CAS0 (NC)*
|
| A17 |
A0 |
B17 |
/CEO (NC)*
|
| A18 |
GND |
B18 |
AS
|
| A19 |
D7 |
B19 |
NC
|
| A20 |
D0 |
B20 |
DTACK
|
| A21 |
D8 |
B21 |
NC
|
| A22 |
D6 |
B22 |
D15
|
| A23 |
D1 |
B23 |
D14
|
| A24 |
D9 |
B24 |
D13
|
| A25 |
D5 |
B25 |
D12
|
| A26 |
D2 |
B26 |
/CART
|
| A27 |
D10 |
B27 |
/CEO (CE ROM)
|
| A28 |
D4 |
B28 |
/LWR
|
| A29 |
D3 |
B29 |
/CAS2
|
| A30 |
D11 |
B30 |
/M3
|
| A31 |
VCC |
B31 |
/TIME
|
| A32 |
GND |
B32 |
/CAS0 (OE ROM)
|
B16 and B17 MT are also /CAS0, /CEO signals but B27 and B32 are the slot-switched /CAS0 and /CEO specific for MT.
The Megatech switches these signals on/off from slot to slot, to enable or disable the specific cart.
References
