In the figure below, what should be in the blue boxes for IR and MAR, respectively? Start Example 1 Is next instruction Yes The execution path would depend on the right instruction MAR-PC No memory in IBR? Fetch access cyde MBR-MMAR) required Arithmetie-logk unit (ALU) Left Instruction Yes IBR-MBR (20:39) IR-MBR (0:7) MAR-MBR (8:19) AC IR- MAR IR -MBR (20:27) MAR - MBR (28:39) required Input- Arithmetie-deg output equipment creuits MBR ??? Decode instruction in IR IFAC>0 then go to MOX, :19 PC-PC+1 Go to MCX, 0:19) AC-AC + MOX) lastretio AC-MIX) and data Execution Yes Is AC >0? ode MBR-M(MAR) PC-MAR MBR-MOMAR) Main memory M IR MAR AC--MBR AC-AC + MBR Contrud Contrl circeits Addreses M(X) = contents of memory location whose address is X j bits i through j Program control unit
In the figure below, what should be in the blue boxes for IR and MAR, respectively? Start Example 1 Is next instruction Yes The execution path would depend on the right instruction MAR-PC No memory in IBR? Fetch access cyde MBR-MMAR) required Arithmetie-logk unit (ALU) Left Instruction Yes IBR-MBR (20:39) IR-MBR (0:7) MAR-MBR (8:19) AC IR- MAR IR -MBR (20:27) MAR - MBR (28:39) required Input- Arithmetie-deg output equipment creuits MBR ??? Decode instruction in IR IFAC>0 then go to MOX, :19 PC-PC+1 Go to MCX, 0:19) AC-AC + MOX) lastretio AC-MIX) and data Execution Yes Is AC >0? ode MBR-M(MAR) PC-MAR MBR-MOMAR) Main memory M IR MAR AC--MBR AC-AC + MBR Contrud Contrl circeits Addreses M(X) = contents of memory location whose address is X j bits i through j Program control unit
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
1. MBR (20:27) and MBR (28:39)
2. IBR (0:7) and IBR (8:19)
3. IBR (20:27) and IBR (28:39)
4. MBR (0:7) and MBR (8:19)
Transcribed Image Text:In the figure below, what should be in the blue boxes for IR and MAR, respectively?
Start
Example 1
Yes
Is next
The execution path would
depend on the right instruction
instruction
MAR-PC
No memory
in IBR?
Fetch
access
cycle
required
MBR-MMAR)
Arithmetie-logke unit (ALU)
Left
instruction
required
Yes IBR-MBR (20:39)
IR -MBR (0:7)
MAR-MBR (S:19)
No
IR -MBR (20:27)
AC
мо
IR -
MAR
MAR-MBR (28:39)
Input-
output
equipment
Arithmetie-legie
circuits
MBR
PC-PC +1
Decode instruction in IR
???
AC-AC + MEX)
AC- M(X)
Go to M(X, 0:19)
IF AC >0 then
lastructions
and data
go to MCX, 0:19
Execution
Yes
Is AC >0?
cycle
IBR
PC
MBR-M(MAR)
PC-MAR
MBR-M(MAR)
Main
memory
IR
MAR
M
AC-MBR
AC-AC + MBR
Contrd
Control
circuits
signals
Addresses
M(X) = contents of memory location whose address is X
(ij) = bits i through j
Program control unit
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