Screen display mode
The data register stores the display mode of the FP-e screen:
- 0 = N mode 1st screen
- 1 = N mode 2nd screen
- 2 = S mode 1st screen
- 3 = S mode 2nd screen
- 4 = R mode 1st screen
- 5 = R mode 2nd screen
- 6 = I mode 1st screen
- 7 = I mode 2nd screen
