How do subject markers work on verbs in some Austronesian languages of Sulawesi and eastern Indonesia?

In many Austronesian languages of Sulawesi and eastern Indonesia, subject markers are attached to the verb as prefixes.1

In some of these languages, these prefixed subject markers function as a system of agreement by co-occurring with full, free pronouns that also mark the subject. This structure differs from the complex focus-affix systems found in many other Austronesian languages, such as those in the Philippines or northern Sulawesi, where verbal affixes instead signal the syntactic relationship (such as actor, patient, or location) of a focused noun phrase.12