We found the 57.2832MHz oscillator was used to produce a resolution for the Apple Portrait Display (or a full-page display by Sunkyung, according to the control panel). So maybe it would drive an Apple display, but only in 1-bit monochrome since it's an SE.
No idea whether the overall design is close enough to the card on the Portable (I doubt it), but you could try the VideoMacPac software at the link above. Or look for anything based on Lapis DisplayServer, which I think a lot of these CPLD designs used. Given the lack of ROM chip on the board it probably needs drivers to run.
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