This past Shabbos in shul, I saw a paper about the pronunciation of the word בשגם (Bereishis 6 3).
"וַיֹּאמֶר ה' לֹא־יָדוֹן רוּחִי בָאָדָם לְעֹלָם בְּשַׁגַּם הוּא בָשָׂר וְהָיוּ יָמָיו מֵאָה וְעֶשְׂרִים שָׁנָה׃ "
The author claimed that all chumashim printed until up to 50 or so years ago (his actual words were בעשרות השנים האחרונים) pronounced the word with Kamatz, wearas nowadays it is common to find the word vowalized with Patach (like wikitext).
Are there any sources for the Pasach version over the Kamatz version?