I'm not into emulation at all, but I wonder how low level the passive LCD panels were software controlled in game or system ROM? The wikipedia page on Walsh fu

I'm not into emulation at all, but I wonder how low level the passive LCD panels were software controlled in game or system ROM? The wikipedia page on Walsh functions says: >They are also used in passive LCD panels as X and Y binary driving waveforms where the autocorrelation between X and Y can be made minimal for pixels that are off. Not sure how applicable that is on which of the systems you are considering. Sorry for the rabbit hole ;)