I need help with this.

1. In this part you are asked to recognize what a given segment of machine code does, by translating it into assembly code, and annotating it with expressions in a high level language like C. This process, from binary code back to source code, is called disassembling. Disassemble the following machine code into operations and arguments, e.g., ADD R1, R2, R3. Explain what the whole program does, either in plain English (e.g., it calculates the product of R1 and R2) or in C type of pseudo code (e.g, R3 = R1 * R2.) Note: you need to make up unique labels for branch instructions in your assembly code. Addr: Code

-----------------------

0x00: 07FF

0x02: 280A

0x04: 0608

0x06: 23C7

0x08: 3802

0x0A: 3C00

2. If the register files (each register has 8-bit) have the initial image as the following, what are the values of these 8 registers when the execution of the program in part 1 stops? R0: 0101 1010

R1: 0000 0100

R2: 0000 0000

R4: 0000 0000

R5: 0000 0000

R6: 0000 0000

R7: 0000 1000

3. Translate the following segment of C program into assembly code for the machine given above. Note: you may assume the unsigned integer a is already given in register R0. By convention, put the returned value in R7. c = 0; while (a>0) { if (a & 0x01 ==1){

c++; a>> 1;

}

return c;