PIC MICROCONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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RETLW
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RETURN
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RLF
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RRF
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Detailed explanation-1: -The RCL (Rotate and Carry Left) instruction shifts each bit to the left, copies the Carry flag to the least significant bit and copies the most significant bit into the Carry flag.
Detailed explanation-2: -The carry flag (CF) is included in the rotation. The least significant bit is rotated to the carry flag, the carry flag is rotated to the most significant bit position, all other bits are shifted to the right. The result includes the original value of the carry flag.
Detailed explanation-3: -The RL instruction rotates the eight bits in the accumulator left one bit position. Bit 7 of the accumulator is rotated into bit 0, bit 0 into bit 1, bit 1 into bit 2, and so on. No flags are affected by this instruction.
Detailed explanation-4: -Mnemonic RAL, which stands or Rotate Accumulator Left and also involvingCy flag in rotation. It rotates the Accumulator contents to the leftby 1-bit position.