I get further with stacks of 100,000 but then it seems to stop after selecting the car position. No drive access, but CAPS still works so not entirely dead... EDIT: I can bring up the mouse pointer too by clicking about, but still just a black screen, nothing happening.
Hopefully I'm going to get my A1200 with the TF1260 out next week (currently I'm rearranging and the Amiga has been placed into a safe location) and give it a try.