A FPGA based Gamecube controller adapter for Nintendo 64
First release of the GC to N64 adapter using a Tang Nano 9k FPGA. This current release only supports 2 controllers, but all 4 ports are supported once uncommented.
Features:
- Low latency ( < 500µs )
- Rumble support
- Wide controller compatibility, including Wavebird, Phob, and Boxx.
Future plans:
- Button remapping
- Input recording and playback via SD card
- Controller Pak save support
Code breakdown: The list of .v modules is:
GC_PollGen.v - Generates the pulses read by a Gamecube controller to indicate the buttons being pressed.
GCC_Data.v - Analyzes the pulses from the Gamecube controller to indicate the status of all buttons, joysticks, and analog triggers.
Analog.v - The Gamecube analog sticks use a 0 to 255 range, while the N64 uses a 0 to 100 scheme with 2s compliment. This module is a giant case statement to convert between the two ranges.
N64_ID.v - Analyzes the data from the N64 to indicate the controller command requested.
Control.v - This module is the controller response of the N64_ID.v analysis. Responses include controller data, controller pak data, rumble pak data, and calibration commands.
bounce.v - This hardware is old and I don't trust it. I am using a debounce module to remove any noise on the data lines.
Adapter_Top.v - Top module to connect all modules together.
