Cool! There was an adventure editor program for the TI; it was by a fellow named Weiland who distributed it through Tex-Comp, the officially licensed TI hardware/software distributor. I think Texas Instrument's website still lists them as the primary point of contact for the system. Sadly, Tex-Comp is out of business, and the present license-holder is a real jerk who alienated most of the community. (Including myself, he threw a few personal insults my way, and got himself kicked from the Yahoo users group.) The bad news with that is that you won't find copies of the editor freely available on TI sites, because of that fiasco.

Anyway, the editor was written by dismantling one of the official Scott Adams adventures. The logical language used to construct adventure logic was actually pretty cool. The only problem with it was it was limited to the original size of the adventures, 12k or so, the most that could fit in the TI's VDP RAM. So writing anything substantial was pretty much impossible. It also had physical limitations for other elements, like counters (six maximum) and flags (thirty-two maximum.)