Button 0 (iIncr) → num inc
Button 1 (iMove) → move editing block depending on ↓ ( Block = a place where we can display a charachter)
Button 2 (iSpace) → type space
Button 3 (iRst) → reset screen
| | SW1 == 0 | SW1 == 1 |
|---|---|---|
| SW0 == 0 | go forward 1 block (Btn 1 and 2) | next line (Btn 1 and 2) |
| SW0 == 1 | go back 1 block (Btn 1 and 2) | font color settings (Btn 0, 1 and 2) |