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A computer interface to a line printer has seven data lines that control the movement of the paper and the print head and determine which
A computer interface to a line printer has seven data lines that control the movement of the paper and the print head and determine which
character to print. The data lines are labeled and and each represents a binary or When the data lines are interpreted
as a bit binary number with line A being the most significant bit, the data lines can represent the numbers to The number is
the command to return the print head to the beginning of a line, the number means to advance the paper by one line, and the
numbers to represent printing characters.
a Write an equation for the variable which is if the data lines indicate a command to return the print head to the beginning of the line.
b Write an equation for the variable which is if there is an advance paper command on the data lines.
c Write an equation for the variable which is if the data lines indicate a printable character. Hint: Consider the binary representations
of the numbers and and write the equation for with only two terms.
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