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The single- cycle computer in Figure 8-15 executes the five instructions described by the register transfers in the table that follows. (a) Complete the following

The single- cycle computer in Figure 8-15 executes the five instructions described by the register transfers in the table that follows.

image text in transcribed

(a) Complete the following table, giving the binary instruction decoder outputs from Figure 8-16 during execution of each of the instructions:

Instruction Register Transfer DA AA BA BA FS MD RW MW PL JB
R[0] R[7] R[3]
R[1] M[R[4]]
R[2] R[5]+2
R[3] sl R[6]

if (R([4] = 0)

PC PC+se AD else

PC PC+1

(b) Complete the following table, giving the instruction in binary for the single- cycle computer that executes the register transfer (if any field is not used, give it the value 0):

Instruction Register Transfer Opcode DR SA SB or Operand
R[0] R[7]+R[6]
R[1] R[5]-1
R[2] sl R[4]
R[3] R[3]
R[4] R[2]vR[1]

image text in transcribed

Extend C Branch N-Control Jump Address RW DA| Register AA A file B-BA Instruction Zero fill Constant Instruction decoder Address out Bus I Data out Mw DBAM F M R M PJ B A A A B S D W W L B C FS Data unit Data out Data in MD- MUXD Bus D DATAPATH FIGURE8-15 Block Diagram for a Single-Cycle Computer

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