Stella for R77 can be controlled via the console buttons or a joystick in left or right port. The resulting actions are depending on the current mode and are described below.
The joysticks work normal and all console buttons as labeled except of the following.
| Joystick | Button | Action |
|---|---|---|
| Button 3 | 4:3,16:9 | Open the command dialog |
| Button 4 | - | Open settings |
| Button 5 | FRY | Return to launcher |
| Button 6 | - | Rewind game |
| Button 8 | MODE | Select |
| Button 9 | RESET | Reset |
| Joystick | Button | Action |
|---|---|---|
| Up | SAVE | Previous game |
| Down | RESET | Next game |
| Left | LOAD | Page up |
| Right | MODE | Page down |
| Button 1 | SKILL P1 | Start selected game |
| Button 2 orhold Button 1 | SKILL P2 | Open power-on options |
| Button 4 | COLOR, B/W | Open settings |
| Joystick | Button | Action |
|---|---|---|
| Up | SAVE | Increase current setting |
| Down | RESET | Decrease current setting |
| Left | LOAD | Previous dialog element |
| Right | MODE | Next dialog element |
| Button 1 | SKILL P1 | Select element |
| Button 2 | SKILL P2 | OK |
| Button 3 or Button 1 + Left |
4:3,16:9 | Previous tab |
| Button 4 or Button 1 + Right |
FRY | Next settings |
| Button 6 | - | Cancel |
Note: If you have a keyboard attached via OTG all keys work as described in the Stella User's Guide.