In that Basic 80 link (number 2) I would have expected another variant to be listed: Microsoft Basic for the Interact Home Computer which used an 8080 processor. BTW I still have my Interact in its box and the MS Basic on tape and some other stuff. Looking for a museum or appropriate place to send it.

I saw an ebay listing for one of these Interact computers today and spent a little time learning about it on YouTube. It's so strange to see your post on the same day about a computer I didn't know existed yesterday.

I would try to computer history museum in Mountain View - they don’t accept everything, but if they want it it’d go to a super cool spot: https://computerhistory.org/acquisitions/

Chances are the tape is no longer readable.