GTIAdigitizer

This board is inserted between the GTIA chip and its socket in one of the Atari 8-bit home computers. The FPGA on the board listens to the digital communication between the GTIA and the rest of the system and re-generates the video output in a near-digital form. This output signal (we call it 'lumacode') can then be flawlessly upscaled to a pixel-perfect HDMI signal using an RGBtoHDMI device or something with equal capabilities.

The original video output of homecomputers of the 1980th is of pretty low quality. Using a modern TV to display this signal normally does not make this any better. In fact it normally just exaggerates the visible noise. Also there is basically no way to improve the analog signal because of the random nature of the noise.

With my digital-only approach, the monitor picture is absolutely perfect without any noise or ghosting.

The board should work with all variants of the Atari 8-bit machines that have a CTIA/GTIA video chip. 

More details are available on the project documentation page.