In the case of the Commodore 64, the 1541 disk drive provided a rudimentary OS, implemented in BASIC. E.g. LOAD “*”,8,1
And the Apple II was generally a matter of starting the computer with the disk inserted and it would just boot to the software.
So does the TI not have something similar to either of these? When a disk drive (PEB or standalone) was purchased for the TI, what did the documentation advise? Did it come with a disk operating system on cartridge? Or was it Wild West, where every commercial disk had a different method for loading?