Problem

A new instruction is to be defined for the multiple-cycle computer with opcode 0010001. Th...

A new instruction is to be defined for the multiple-cycle computer with opcode 0010001. The instruction implements the register transfer

Find the state machine diagram for implementing the instruction, assuming that 0010001 is the opcode. Form the part of the control state table that implements this instruction for the two instructions: Add and check OV (AOV), described by the register transfer

and branch on overflow (BRV), described by the register transfer

The opcode for AOV is 1000101 and for BRV is 1000110. Note that register R8 is used as a “status” register that stores the overflow result V for the previous operation. All of the values N, Z, C and V could be stored in R8 to give a complete status on the prior arithmetic or logic operation.

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Solutions For Problems in Chapter 10