15khz JAMMA arcade game boards are plug and plug via JAMMA wiring harness on Tempest arcade machines. No need to upscalers/converters as the Tempest machine can accept native 15khz, 31khz and up to 1080P.
Tempest arcade machines can support regular 15khz RGB arcade game boards through the JAMMA wiring harness by using the RGB board that allows you to also adjust the colour intensity.
Tempest supports VGA and HDMI inputs with a variety of video resolutions up to 1080P.