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Ask here, our members can do most proms https://www.vintage-radio.net/forum/forumdisplay.php?f=16
Thats a very confident statement I believe its 74S287 and N82S129N
It's not a matter of acumen, it's a matter of having access to vintage device programmers that still work, or the more exotic and expensive modern programmers that still support obsolete PROMs. Not so easy.