Corky,
You would be referring to the TI99-4 for $1100 in 79. 4A was later.
I got mine right on the tail end of its life cycle.
Sears was clearing them out for $100 early 80s prior to the IBM PC which changed the world.
I still remember the day standing at the bus stop with my new computer in hand.
$100 was a LOT of money for me.
My first IBM PC came with a (hold on to your hat) 10 Meg hard drive and 512K of RAM.
Dan,
I'm not familiar with all the terms of this grand solution but it must have sucked.