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ultra64's Introduction

Ultra64

So you want to control 64 N64s at once? No? But Grav does.

Change NUM_CONSOLES=1 to NUM_CONSOLES=N where 1 <= N <= 64, depending on how many consoles are plugged in. You can find the pin mappings in ecp5evn.lpf.

Contains modules for both reading N64 controllers and writing N64 controller data to a console

Synthesizes using prjtrellis (yosys + nextpnr for EPC5) for use on an LFE5UM5G-85F-EVN

Modify Makefile to contain the path to your trellis install make to build make flash for flashing the firmware onto the SPI flash for permanant memory make test for flashing the bitstream in volatile memory Requires openFPGALoader for flashing

Supports TAS playback using the same serial protocol as the TAStm32 Also supports controller passthrough

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ultra64's Issues

9 < 64

Currently have only assigned pins for 9 out of 64 consoles

Flexible number of consoles

Currently, if synthesized to work with N consoles, and only M consoles are present such that M < N, the initial input buffer will exhaust after 1024 frames and never advance.

The two ways of handling this are:

  1. The user should have just compiled it for M consoles. Consider it user error.
  2. Detect that the end of the buffer is reached and stop waiting for all N consoles to finish. Just move on.

Option 2 is more flexible and should ideally be implemented.

Real Controller Reliability

Plugging in an n64 controller after the firmware has been flashed will not work. It currently has to be plugged in prior to flashing. This should be addressed to be more robust in the future

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