Tesla swaps out the entire IC1 for IC2. It isn't worth the trouble to try to reuse the screen to turn an IC1 into an IC2.
I used to think it was possible to keep IC1 with MCU2, since it would be nice for the IC to work even if the MCU were broken, but the whole point of the IC2 being a display is because FSD needs to render faster than IC1 can.
Nothing about FSD is visualized on the MCU1. And IC1 has its own renderer. MCU2 only visualizes FSD stuff on IC2.
cool, thanks! you seem to have great info on this (called the MCU upgrade in testing prior to release), so I’ll defer to you!