Manually simulate the single- cycle computer in Figure 8-15 for the following sequence of instructions, assuming that each register initially contains contents equal to its index (i.e., R0 contains 0, R1 contains 1, and so on):

Figure 8-15

Give (a) the binary value of the instruction on the current line of the results and(b) the contents of any register changed by the instruction, or the location and contents of any memory location changed by the instruction on the next line of the results. The results are positioned in this fashion because the new values do not appear in a register or memory, due to the execution of an instruction, until after a positive clock edge has occurred.

Transcribed Image Text:

ADD R0, R1, R2 SUB R3, R4, R5 SUB R6, R7, RO ADD RO, RO, R3 SUB RO, RO, R6 ST R7, R0 LD R7, R6 ADI R0, R6, 2 ADI R3, R6, 3