bellwood420 / Yet_Another_Arcade-Pong_MiSTer

Yet Another Arcade: Atari Pong (1972) for MiSTer

Yet Another Arcade Pong for MiSTer

• FPGA implementation of arcade Atari Pong(1972)
• Ported to MiSTer from pong-arcade-fpga
• There already exists Arcade Pong in official MiSTer cores, so this is an unofficial yet another version.

Inputs

• Keyboard

   Coin        : Any of the following keys will work
                 - F1 (Coin + Start 1P) 
                 - F2 (Coin + Start 2P)
                 - 1  (Start 1P)
                 - 2  (Start 2P)
                 - 5  (Coin 1)
                 - 6  (Coin 2)
   1P Up/Down  : W/S
   2P Up/Down  : Up/Down

• Joystick, Paddle are supported

What's the difference from the official core?

In terms of just playing the game, there is no major difference.

Technically it differs in the following way:

• The official core implements asynchronous discrete logic circuit as-is on FPGA
• My core implements it totally synchronously by treating clock signals to registers as datapaths for edge detection, and driving them by another clock. I found this technique introduced in this paper

At first, I was trying to implement Pong in the same way as the official core. But I gave it up since I encounterd intolerable unstability due to asynchronous factor.

Why duplicate yet another core?

I wanted my fpga work to be enjoyed by more people.

Unfortunately my original work (pong-arcade-fpga) requires external analog circuit to play. This means that more knowledge, effort and money are required than playing with MiSTer.

I thought it was best to port and publish it as a MiSTer core even there already existed an official core.

In addition, I was interested in learning to develop MiSTer core.