4snes Snes controllers to USB adapter from Raphaël Assénat modified to run on a usbasp programmer. The original project can be found at:
http://www.raphnet.net/electronique/4nes4snes/index_en.php
The latch and clock pins are shared by all 4 controllers. Each controller has its own data pin tough.
| Programming Port | Snes Controller Pin |
|---|---|
| PORTD0 (RX) | Latch |
| PORTD1 (TX) | Clock |
| PORTB2 (RESET) | Controller 1 Data |
| PORTB3 (MOSI) | Controller 2 Data |
| PORTB4 (MISO) | Controller 3 Data |
| PORTB5 (SCK) | Controller 4 Data |
| VCC (5V) | 5V |
| Ground | Ground |
Snes controller pinout:
The reistor in the TX pin (should be 270 ohm, but it is a 1K ohm in mine) needs to be bypassed. This is resistor R7 in my board. I simply used a piece of wire jumper to bypass it. This way I can remove the wire if I ever need the resistor again. The RX and TX pins are not used by the official firmware anyway. Altough I read somewhere there support to serial in an alternative firmware. I always use a separate USB to serial adapter when needed.