Final answer:
The sequence of LC-3 instructions provided loads the address offset into R6 using LEA, then the LDR instructions change R6's value based on R0 and R5's pointing addresses. Ultimately, R6 contains the value 0xFFFF from memory location 0x70A3.
Step-by-step explanation:
The question involves understanding how the LC-3 (Little Computer 3) microprocessor architecture processes instructions and interacts with memory. To determine the value written into R6, we must analyze the given instructions and the values at the indicated memory locations. The instructions given are in binary and represent the following:
- 0x3010: 1110 0110 0011 1111 is an LC-3 LEA instruction that loads the effective address of the label into R6. The offset is given by the last nine bits (0011 1111).
- 0x3011: 0110 1000 1100 0000 is an LC-3 LDR instruction which loads into R6 the value that is one memory location before the address in R0 (R0 is assumed to be pointing at 0x70A4).
- 0x3012: 0110 1101 0000 0000 is another LDR instruction that will load into R6 the value at the memory address contained in R5 (R5 is assumed to be pointing at 0x70A2).
The sequence of instructions result in R6 containing the value 0xFFFF, which is found at memory location 0x70A3, as instructed by the second and third operations.