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This guide illustrates how to add memory and a register file to the data path, enabling writing data from ALU to registers, memory, and more. Learn about selecting data sources for register input and enhancing the system for multiplication with shift unit and M-reg.
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Keyboard Reg Addr LD1 M1 OpCode Reg File 4-bit Reg M U X enable enable WR ER A L U WM 4-bit Reg M U X Mem Unit Mem Addr EM LD2 M2 Enhancing Data Path • We can add a memory and a register file to data path as shown • Data from ALU can be written in reg file, memory, and registers • Data from reg file and mem unit can be selected for register input
M- Reg LDM Input Reg Addr LD1 M1 OpCode Reg File 4-bit Reg M U X enable enable enable WR ER A L U WM 4-bit Reg M U X Mem Unit Mem Addr EM LD2 M2 Addition for multiply • For multiplication, we add a shift unit and and M-reg • M-reg can be loaded with output of ALU and copied on bus • Shift unit can shift operand one bit left or right with or without M-register contents
M- Reg LDM Input Reg Addr LD1 M1 OpCode Reg File 4-bit Reg M U X enable enable enable WR ER A L U WM 4-bit Reg M U X Mem Unit Mem Addr EM LD2 M2 Complete Block diagram
