Theory

The datapath to be implemented has two (S and D) registers and one ALU, and does the operations in Table 0.1.

  
Table: ALU Operations

The design specifications given by the class notes are:

• Use 4-bit adder (X74-83) and 4-bit registers (RD4) in XACT libraries.

• Operands are loaded from DIP switches to registers before operations, and contents of D and S-registers are displayed by LED's.

• Results of operations are displayed by 7-segments LED, and written back to D-register (except LOAD to D-register).