Which at the very top encodes the address the command address register and pulls a line of the 8 x 8 address selector matrix to 0V. To the right a line of the dial matrix is raised to 35V.-Which at the very top encodes the address　the command address register and pulls a line of the 8 x 8 address selector matrix to 0V. To the right a line of the dial matrix is raised to 35V.