Atari Joystick - rosco-pc/propeller-wiki GitHub Wiki
Atari Joystick Driver & Virtual NES Driver Written by Jeff Ledger
This file includes a schematic for connecting an Atari joystick to either the Demoboard or Protoboard VGA interface to save I/O for other connections. The interface consists of a DB25male, DB9male, and a few resistors.
The second part of this file is an NES_DRIVER which converts existing code to this interface. Also there is a drop-in replacement for NES code as well.