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.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

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.

6.
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.
C5
C12
Data
AC
PC
IR
Bus
* Control
signals
ALU
Control
Flag C24 -
MQ
C25
unit
Address
C14oH
R1
-O- c19
0 C19
Bus
Clock
Control
signals
C150H
R2
c20
C16o
R3
C21
R4
-O c22
RAM
C18
R5
- C23
Signal Description:
Control signals
operation
MAR to RAM (through address
Comments
CO
bus)
PC to MBR
PC to MAR
MBR to PC
C1
C2
C3
C4
MBR to IR
CS
RAM to MBR
MBR to ALU
Accumulator to ALU
IR to MAR
C6
C7
C8
C9
ALU to Accumulator
C10
MBR to Accumulator
C1
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
R4 to MBR
R5 to MBR
C2
C23
C24
MBR to MQ
C25
MQ to MBR
Read signal: CPU to RAM
Write Signal: CPU to RAM
MQ to ALU
ALU to MQ
CR
CW
C-MQ-ALU
C-ALU-MQ
C-add
|C-sub
Addition signal to ALU
Subtraction signal to ALU
С-or
Logical OR operation to ALU
Logical AND operation to ALU
Multiplication signal to ALU
C-and
MQ must hold Multiplicand and AC must hold multiplier. After Multiplication, higher Byte
will be stored in MQ and Lower Byte in AC
С-mul
Division signal to ALU
MBR is used as buffer for any Register to register transfer operation.
C-div
Dividend in MQ and divisor in AC. After division, Quotient in MQ and remainder in AC

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