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CMA

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  Syntax: CMA Byte: 1byte Addressing Mode: Implied Addressing Flag: None Working:  1. Microprocessor will allocate one byte for opcode. 2. During the execution of the instruction microprocessor will perform 1's complement on content of Accumulator. Example: CMA  where  [A] = 22H  After execution of CMA    [A] = DD H                             A= 22 H =  0010  0010 1's Complement of A =  1101   1101 = DD H
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RAL

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  Syntax: RAL   Byte: 1byte   Addressing Mode: Implicit Addressing Working:  1. This is one byte instruction. 2. Microproccessor will allocate one byte for opcode RAL and operand is Accumulator i.e. operand will not need memory allocation during execution. 3. Thi s instruction rotates content of Accumulator one bit position towards left.   i.e. The bit A7 is stored  in carry flag and content of carry flag will get stored in A0 bit position.   4. C Flag will get affected. Example: RAL   where   [A]= 21H After execution of RAL [A] =43H     A= 21 =  0010 0001 Cy  <-   A7 <- A6 <- A5 <- A4 <- A3 <- A2 <- A1 <- A0   | ___->____________________________->________|   1            0         0         1        0     ...
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RAR

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  Syntax: RAR   Byte: 1byte   Addressing Mode: Implicit Addressing Working:  1. This is one byte instruction. 2. Microproccessor will allocate one byte for opcode RAR and operand is Accumulator i.e. operand will not need memory allocation during execution. 3. Thi s instruction rotates content of Accumulator one bit position towards Right.   i.e. The bit A0 is stored  in carry flag and content of carry flag will get stored in A7 bit position.   4. C Flag will get affected. Example: RAR   where   [A]= 21H After execution of RAR [A] = 90H     A= 21 =  0010 0001 A7 ->  A6 -> A5 -> A4 -> A3 -> A2 -> A1 -> A0   -> Cy    |___<-____________________________<-________|   0         0         1        0       0    ...
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