Study the following handwritten (potentially buggy) code (you can assume "." refers to code that is not shown main: LDS R25, x PUSH R25, CALL subroutine1 ; This instruction is at location ex1296 POP RO, ; This subroutine is at location @XAB33 subroutine1: MOV R25, R8 CALL subroutine2 ; result MOV R24, R7 RET subroutine2: ; This subroutine is at location exAD54. NO code is missing from this subroutine ADD RS RS PUSH RS RET Assume the return address stored in the stack by the CALL instruction is 3 bytes. What is the value of the Program Counter after the RET instruction in Subroutine 2? (Write your answer in Decimal, write O if unknown)

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...
icon
Related questions
Question
Study the following handwritten (potentially buggy) code (you can assume "..." refers to code that is not shown
main:
...
LDS R25, x
PUSH R25,
CALL subroutine1 ; This instruction is at location ex1296
POP RO,
...
subroutine1:
; This subroutine is at location OXAB33
...
MOV R25, R8
CALL subroutine2
...
MOV R24, R7
; result
RET
subroutine2:
; This subroutine is at location @XAD54. No code is missing from this subroutine
ADD R8 R8
PUSH RS
RET
Assume the return address stored in the stack by the CALL instruction is 3 bytes.
What is the value of the Program Counter after the RET instruction in Subroutine 2? (Write your answer in Decimal, write 0 if unknown)
Transcribed Image Text:Study the following handwritten (potentially buggy) code (you can assume "..." refers to code that is not shown main: ... LDS R25, x PUSH R25, CALL subroutine1 ; This instruction is at location ex1296 POP RO, ... subroutine1: ; This subroutine is at location OXAB33 ... MOV R25, R8 CALL subroutine2 ... MOV R24, R7 ; result RET subroutine2: ; This subroutine is at location @XAD54. No code is missing from this subroutine ADD R8 R8 PUSH RS RET Assume the return address stored in the stack by the CALL instruction is 3 bytes. What is the value of the Program Counter after the RET instruction in Subroutine 2? (Write your answer in Decimal, write 0 if unknown)
Expert Solution
steps

Step by step

Solved in 3 steps with 1 images

Blurred answer
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY