Homework 13 1. (12 pts) Specify the 16-bit control word that must be applied to the datapath of the single-cycle simple computer in Chapter 8 of your textbook (See Fig 8-11) to implement each of the following microoperations. Use the control word fields shown in Figure 8-11. Present your answers in table form. a) R2sr R4 b) R3 Data in c) R1 R3 V Constant in d) R4 R3+1 2. (17 pts) Given the following sequence of 16-bit control words for the same datapath, and - the initial register contents listed below (each register contains an ASCII character code) determine a) the microoperation sequence that is executed (in RTL), b) the final register contents, and c) the ASCII characters represented by the register contents, and the unscrambled word 2 initial register contents RO 00000000 R1 00100000 control word sequence 011 011 001 00010 0 1 100 100 001 0 1001 0 1 R2 01000100 R3 R4 01000111 01010100 R5 01001100 R6 01000001 R7 01001001 101 101 001 0 1010 001 001 000 0 1011 01 0 1 001 001 000 00001 01 110 110 001 00101 0 1 111 111 001 0 0101 0 1 001 111 000 0 0000 0 1 Entcl 4 computer has a 22 bit instruction word broken into fields as follows oncedo cix bits two register Instruction Opcode DR 15 14 13 12 11 10 9 8-6 出望 5-3 SA SB 2-0 888 19-17 16-14 13-11 10 9-6 5 4 3 2 1 0 DA АА BA MB FS MD RW MW PL JB BC Control word FIGURE 8-16 Diagram of Instruction Decoder