Determine the values for the following table: Instruction Machine code (Hex) Idaa 31, * a6
Added by Alejandro D.
Step 1
The string "Idaa 31, *" is most likely the Motorola 6809 mnemonic LDAA with an indexed operand 31 (the "*" here indicating the indexed form); so the instruction is LDAA 31,X (load accumulator A from the memory at address X+0x31). Assume the operand 31 is already Show more…
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Answer the following questions in terms of the machine language described in Appendix C. a. Write the instruction 2304 (hexadecimal) as a string of 16 bits. b. Write the op-code of the instruction B2A5 (hexadecimal) as a string of 4 bits. c. Write the operand field of the instruction B2A5 (hexadecimal) as a string of 12 bits.
Input A3A2A1A0 Output O3O2O1O0 (Hex) 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
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The following table represents the addresses and contents (using hexadecimal notation) of some cells in a machine's main memory. Starting with this memory arrangement, follow the sequence of instructions and record the final contents of each of these memory cells: $\begin{array}{cc}\text { Address } & \text { Contents } \\ 00 & \mathrm{AB} \\ 01 & 53 \\ 02 & \mathrm{D} 6 \\ 03 & 02\end{array}$ Step 1. Move the contents of the cell whose address is 03 to the cell at address 00 Step 2. Move the value 01 into the cell at address 02 Step 3. Move the value stored at address 01 into the cell at address 03
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