Hi Franz,

Hitting "Enter Pos." clears the board and the Debut-M is ready to input the white king position (push the relevant square).
Use "Select Piece" to switch to another one, or "Force Move" to switch color (6=white, 4=black).
Once the position is legal, pressing "Enter Pos." again exits the setup mode.
As usual, the last selected color before exiting the mode is the side ready to play.

Pos. Mode is the verify mode; display C 1 means it is enabled; another hit displays C 0 which means verify mode off (ready to play).

MfG,
Eric