I'm trying to list all the components and connections in the hardware descriptions. I just double-checked, and TI-30, TI-Programmer, Business Analyst II, Electronic Detective, Comp IV and Code Name: Sector do not have any oscillator resistors or capacitors on their PCBs. That must have been another cost-cutting move TI made. Unfortunately, I didn't try to measure the clock speeds on those devices. But I do have a second TI-30; I'll try to measure the clock speed on its OSC pins. I assume the other 0980 devices run at the same speed.