Assume that two numbers: dividend and divisor are saved in memory address M1 and M2 respectively. Quotient and remainder should be saved in R1 and R2 respectively. Write assembly language instructions and then list microoperations for each instruction and list the control signals required to be activated for each microoperation. MBR is used as buffer for any register to register transfer operation.
Signal Description:
| Control signals | operation | Comments |
| C0 | MAR to RAM (through address bus) | |
| C1 | PC to MBR | |
| C2 | PC to MAR | |
| C3 | MBR to PC | |
| C4 | MBR to IR | |
| C5 | RAM to MBR | |
| C6 | MBR to ALU | |
| C7 | Accumulator to ALU | |
| C8 | IR to MAR | |
| C9 | ALU to Accumulator | |
| C10 | MBR to Accumulator | |
| C11 | Accumulator to MBR | |
| C12 | MBR to RAM (through data bus) | |
| C13 | IR to Control Unit | |
| C14 | MBR to R1 | |
| C15 | MBR to R2 | |
| C16 | MBR to R3 | |
| C17 | MBR to R4 | |
| C18 | MBR to R5 | |
| C19 | R1 to MBR | |
| C20 | R2 to MBR | |
| C21 | R3 to MBR | |
| C22 | R4 to MBR | |
| C23 | R5 to MBR | |
| C24 | MBR to MQ | |
| C25 | MQ to MBR | |
| CR | Read signal: CPU to RAM | |
| CW | Write Signal: CPU to RAM | |
| C-MQ-ALU | MQ to ALU | |
| C-ALU-MQ | ALU to MQ | |
| C-add | Addition signal to ALU | |
| C-sub | Subtraction signal to ALU | |
| C-or | Logical OR operation to ALU | |
| C-and | Logical AND operation to ALU | |
| C-mul | Multiplication signal to ALU | MQ must hold Multiplicand and AC must hold multiplier. After Multiplication, higher Byte will be stored in MQ and Lower Byte in AC |
| C-div | Division signal to ALU | Dividend in MQ and divisor in AC. After division, Quotient in MQ and remainder in AC |
| MBR is used as buffer for any Register to register transfer operation. | ||
Enjoy 24/7 customer support for any queries or concerns you have.
Phone: +1 213 3772458
Email: support@gradeessays.com