>the TI-99/4a
TI-99/4a is what you get when you design in a complete vacuum, I mean ignoring the competition at the time.
http://shawweb.myzen.co.uk/stephen/tihistory.htm
GPL? GROMs? What on earth were they doing?
https://www.unige.ch/medecine/nouspikel/ti99/groms.htm
https://www.unige.ch/medecine/nouspikel/ti99/gpl.htm
Well Apple-II had its "Sweet16".