Assembly language: O is easier to program in than high-level languages. O All of these are correct. O uses alphabetic (mnemonic) codes in place of binary strings. O is not translated into machine language.

Identify the addressing modes of following instructions. 11: MOV AL,10H 12: ADD AL,[1010H] a. 11 is based on register addressing mode and 12 is based on immediate addressing mode. O b. 17 is based on implied addressing mode and 12 is based on direct addressing mode. O c. 11 is based on immediate addressing mode and 12 is based on direct addressing mode. O d. 11 is based on direct addressing mode and 12 is based on immediate addressing mode.

QUESTION 33 Which one of the following will not lead to faster instruction execution? Sequential execution Pipelined execution A wide data bus A faster ALU

Assume that the system has eight 2-bit data inputs, A=a1a0, B=b1b0, C=c1c0, D=d1d0, W=w1w0, X=x1x0, Y=y1y0, Z=z1z0. There are also 2 control bits s1s0. The system computes A+B, C+D, W+X, and Y+Z when s1s0 equal to `11', `10', `01', `00', respectively. Use 1-bit 2-to-1 multiplexers and a 2- bit adder to implement this function. Please show how the inputs, multiplexers, and adder are connected. Label the inputs and select signals clearly. You don't need to show the details of the adder. (Hint: The adder has two 2-bit inputs E=e1e0 and F=f1f0. Each of E and F is generated by a 2-bit 4-to-1 multiplexer, which can be built using 1-bit 2-to-1 multiplexers.)

Write, and test using spim, an assembly language program that inputs acharacter string from the user (you can assume that the string will be at most 20characters, not including the zero byte delimiter), forms a new string that contains thecharacters of the input string, but in reverse order, and then outputs the new string.