Four memory-reference instructions in the Basic Computer of the textbook's Chapter 5 are to be changed to the instructions specified in the following table, where "EA" denotes the operand's effective address. Symbol Opcode Symbolic designation Description in words Logic NAND of AC to memory Logical shift right memory content 001 010 011 | MIEAI shr(MIEAD | MIEA] shl(MIEAD | If (MEA] mod 2-1) then PC PC + 1 LSR | | | LSL Logical shift left memory content | Skip next 2 instructions if MIEAlisodd SKT In the following table, write down the necessary micro-operations (in RTL) to perform the execution phase of each instruction. Note that the execution phase of such type of instructions starts at T4. See figures 2 and 3 from Annex. Note 1. The value in AC should not be changed by the execution of any instruction, unless the instruction specifies a change in its content. To this extent, you can use TR to store the temporary content of AC. Note 2, Only msb and Isb of registers AC and E can be checked. Comments Symbol RTL NND LSR Four memory-reference instructions in the Basic Computer of the textbook's Chapter 5 are to be changed to the instructions specified in the following table, where "EA" denotes the operand's effective address. Symbol Opcode Symbolic designation Description in words Logic NAND of AC to memory Logical shift right memory content 001 010 011 | MIEAI shr(MIEAD | MIEA] shl(MIEAD | If (MEA] mod 2-1) then PC PC + 1 LSR | | | LSL Logical shift left memory content | Skip next 2 instructions if MIEAlisodd SKT In the following table, write down the necessary micro-operations (in RTL) to perform the execution phase of each instruction. Note that the execution phase of such type of instructions starts at T4. See figures 2 and 3 from Annex. Note 1. The value in AC should not be changed by the execution of any instruction, unless the instruction specifies a change in its content. To this extent, you can use TR to store the temporary content of AC. Note 2, Only msb and Isb of registers AC and E can be checked. Comments Symbol RTL NND LSR