MC6847digitizer

This board is added to the underside of any computer using the MC6847 video chip. The FPGA on the board listens to the digital communication between this chip 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, an OSSC or something with equal capabilities.

The board works with the usual variant of the chip, as well as the MC6847T1 that is used in the Color Computer IIb. For this specific variant, you need to close solder jumper JP1 during installation.

Machines that create a 50Hz signal always do some trickery to make the MC6847 generate this kind of frame rate. The MC6847digitizer allows for that without additional configuration.

More details are available on the project documentation page.