2. Before starting this part of the lab, please do all calculations below manually. Create a new project: Lab5b. Copy the appropriate files over from the provided zip file. Starting with

provided calculate.s, modify it to add or subtract the numbers that are stored in the memory and store the sum in memory (i.e. your program should read numbers from the memory, apply mathematical operation to the numbers accordingly and save the result in the memory). Put the operand values given into the .rodata section of your program. Execute the programs and record the sum or subtraction and the 'C' (carry) and 'Z' (zero) bits of the condition code register. Use the following data: a. Addition of two single-byte numbers: 0xC3 + 0x8D Helpful steps: 1) Use LDRB to read a byte of data from memory into a register. How does an instruction refer to memory location? How do you initialize memory? Hint: Look at Lab5a, above. 2) Use ADD to add numbers in registers. ab 5 Rev. 3 -7- Advanced Assembly, Branching, and Monitor Utilities 3) Use STRH or STR in order to save the result from a register to memory-why shouldn't you use STRB in this case? 0xF5-0x34 0xFE6B34-0x58CF21 0x2E68B3F4 +0x5C2A b. Subtraction of two single-byte numbers: c. Three-byte subtraction: d. Multi-byte addition: