Help Convert the Hexadecimal string 8946FEH to equivalent Assembly Language instruction. Show your solution. Hint: FEH is a 2's complemented number.Place

[NEEDITNOW0819]

Convert the Hexadecimal string 8946FEH to equivalent Assembly Language instruction. Show your solution. Hint: FEH is a 2's complemented number.

Place your solutions and step by step

 

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To convert the hexadecimal string 8946FEH to its equivalent Assembly Language instruction, we need to understand the format of Assembly Language instructions and the representation of 2's complement numbers.

An Assembly Language instruction consists of an operation code (opcode) and one or more operands that specify the data on which the operation is to be performed. The opcode is represented by a mnemonic such as MOV, ADD, SUB, etc., and the operands are represented by registers, memory locations, or immediate values.

In the given hexadecimal string, the last two digits "FEH" represent a 2's complemented number. To convert it to its decimal equivalent, we first need to find the 1's complement of the number and then add 1 to it. The 1's complement of FEH is 01H, and adding 1 to it gives us 02H. Therefore, the decimal equivalent of FEH in 2's complement notation is -2.

Now, let's convert the remaining part of the hexadecimal string "8946" to its Assembly Language instruction. Since we don't have any specific context, we can assume that the instruction is a data movement instruction, such as MOV. In this case, the opcode for MOV is "8B" in hexadecimal notation.

To specify the operands for the MOV instruction, we need to know the addressing mode used in the instruction. The addressing mode specifies how the operand is located or addressed. There are several addressing modes in Assembly Language, such as register addressing, immediate addressing, direct addressing, indirect addressing, indexed addressing, etc.

Without any information about the addressing mode, we can assume that the instruction uses direct addressing, where the operand is specified by its memory location. In this case, the operand is the memory location represented by the hexadecimal number "8946". To specify the operand in Assembly Language, we can use the syntax "[address]", where "address" is the memory location in hexadecimal notation.

Putting all the pieces together, the equivalent Assembly Language instruction for the hexadecimal string 8946FEH is:

MOV AX, [-2+8946H]

In this instruction, "AX" is the destination register, "-", "2" is the decimal equivalent of the 2's complemented number "FEH", and "8946H" is the memory location specified by the remaining part of the hexadecimal string. The square brackets indicate that the operand is located at the memory location specified by the expression inside the brackets.

 

[NEEDITNOW0819]

• 2. Convert the Assembly Language Instruction ADD SP, –02 to Machine Language Instruction. Show your solution.
  

 

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The Assembly Language Instruction ADD SP, –02 adds the decimal value -2 to the stack pointer register (SP).

To convert it to a Machine Language Instruction, we need to first translate the instruction into its binary representation using the opcode for the ADD instruction (which is 0000 10xx, where "xx" represents the addressing mode) and the binary representation for the SP register (which is 11).

The immediate value to be added (-2) needs to be represented in 2's complement notation, which is the standard way to represent negative numbers in binary. To do this, we invert all the bits of the positive value (in this case, 2) and add 1 to the result. In other words, -2 in 2's complement notation is 1111 1110.

Putting all this together, the Machine Language Instruction for ADD SP, –02 is:

00001010 11111110

The first 4 bits (0000) represent the opcode for the ADD instruction, the next 2 bits (10) represent the addressing mode (register direct), and the last 8 bits (11111110) represent the 2's complement representation of the immediate value (-2) to be added to the SP register.