A french guy named Marc Guthmuller wrote about modding the super72 mode to match 1942 specs back in 1994:
(Google found several reports of terrible flicker in 800x600 but according to this article that's due to super72 using 23kHz, which is in between the monitor's two supported frequency bands)
https://obligement-free-fr.translate..._x_tr_pto=wapp