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This is a very cool DIY project dedicated to the famous Atari 2600 and Sony Walkman combined! It comes with HDMI output and 100% compatibility with accessories and cartridges. The construction of the device is fairly straightforward. It consists of a 3D printed frame that the circuit boards attach to, and a 3D printed shell that covers the frame, and finishes off the look of it. The size of the frame, and the placement of the buttons were dictated by the size of the Atari 2600 cartridge. At the heart of all this is the main circuit board. It is a six layer PCB that contains the FPGA, the HDMI transmitter, and all of the various support chips and components. Specific to the Atari 2600 is the support hardware for paddles. The Atari TIA chip has internal Schmitt triggers on its paddle inputs that make up part of the circuit used to detect the paddle position. The analog audio hardware is also specific to the Atari 2600. I would like to expand the board design to include all of the SID sound chip analog circuitry. The level translators for the joystick ports are bidirectional, so that the system will work with input devices as well as peripherals such as the AtariVox.

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