Unfortunately, I'm not. Growing up in the inner-city (Detroit), the ONLY thing we learned about our ancestors' history was slavery. No desire to thread-jack, but being influenced by such an education system does wonders for one's self-esteem (especially at such a young age)... Seems I have a research topic for the day!
">I was under the impression Africa had no native written languages
Are you kidding me? Ethiopia alone has multiple scripts."
Ah well, when I was living in the United States people used to ask me if we all used elephants for transport in India. I used to answer "Sure, we had this big stable of elephants and I went to school on one, as did all the kids in the neighbourhood. Actually I went to the airport for my trip here on the house elephant .. "
(Fwiw, my great grandfather did own an elephant in the early 1900s but it used to haul lumber and take part in temple processions, not so much provide transport from point A to B ... )
Someone already pointed out examples from East Africa. In west Africa, there is the native pictographs of Adinkra of Ghana. There is also the native Bagam writing system of Cameroon (extinct). In Nigeria, there was a script known as Nsibidi.
Unfortunately, it's a common misconception that Africa had no writing systems or math.
Writing may not have been developed indigenously in non-Egyptian Africa, but that doesn't mean it couldn't have been imported—and early on, too. Like anywhere else, you have a spectrum running from languages written in an imported script (Arabic) to languages written in a script modified from an imported script (Ajami) to languages written in totally new scripts (nevertheless originally derived from imported scripts—Ge'ez)
That's kind of a bogus question to begin with. Africa is not exactly culturally homogenous, and in fact Egypt (and a lot of nearby civilizations) would be more appropriately regarded as part of the ancient Middle East, owing to the fact that it was easier to cross the Red Sea than the Sahara.
I'm not sure what you mean by "bogus question." How would you classify these: Does Asia have any native writing systems? Or Europe?
I consider them quite straight-forward.
I am well aware of the cultural make-up of Africa. In regard to your statements about ancient Egypt, isn't that up for debate. You speak with a certainty that even most Egyptologist lack.