Sketch of the ARGOS WFS computer and reconstruction matrix. First, the computer receives the analogue signals through 8 channels from the ARGOS pnCCD camera. It digitizes the data and sends the pixel values to the computing part of the board for LGS slope computation. In parallel, the computer can also receive the NGS tip-tilt slopes and the slopes from a third WFS, currently from the first light AO (FLAO). Finally, a slope vector is assembled and sent to the ASM switch BCU, selecting the working wavefront sensor, and then forwarded to the ASM control.