load_state
The option documentation is properly formatted yet
Description: Load state by number Default: Example: 5 Type: integer Range: 1 - 9 Since: 2.3.12
Loads a save state identified by the save state slot number (1..9) when FS-UAE starts. If the state does not exist, nothing will happen.
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/load_state