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What is true about Encoded Mode?

the unit contains registers to store the keyboard, display modes

the counter internally decodes the least significant 2 bits and provides a decoded 1 out of 4 scan on SL0-SL3.

the processor is requested service only if any key is pressed, otherwise the CPU will continue with its main task.

the counter provides the binary count that is to be externally decoded to provide the scan lines for the keyboard and display.

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