Assignment 1- ASM programs -copy from big Endian to little Endian

Click Here to enroll in this course now

60-266 – Assignment #1

Question #1 (30 points)
Write an ASM program that calculates the following expression, using registers:
A = (A – B) + (C – D)
Assign 32-bit signed integer values to EAX, EBX, ECX, and EDX registers. Display their values.

Answer(partial):

INCLUDE Irvine32.inc; contains library procedures for IA - 32

.data; data segment, read and write
varA SDWORD 10
varB SDWORD 20
varC SDWORD 30
varD SDWORD 40

.code; code segment, read - only

main PROC


call DumpRegs

exit
main ENDP
END main

Question #2 (30 points)
Write an ASM program that calculates the following expression, using variables:
A = (A + B) – (C + D)
Assign 8-bit unsigned integer values to variables A, B, C, and D. Display their values.

Answer(partial):

INCLUDE Irvine32.inc; contains library procedures for IA - 32

.data; data segment, read and write
varA BYTE 10
varB BYTE 20
varC BYTE 30
varD BYTE 40
finalVal BYTE ?

.code; code segment, read - only
main PROC


call DumpRegs
exit
main ENDP

END main

Question #3 (30 points)
Write an ASM program that uses the variable below and MOV instructions to copy the value from bigEndian to littleEndian, reversing the order of the bytes. The number’s 32-bit value is understood to be 12345678 hexadecimal.
.data
bigEndian BYTE 12h, 34h, 56h, 78h
littleEndian DWORD ?
Display the values of bigEndian and littleEndian.

Answer(partial):

INCLUDE Irvine32.inc

.data
bigEndian BYTE 12h, 34h, 56h, 78h
littleEndian DWORD ?
Array BYTE ?

.code
main proc


L1:


loop L1



call DumpRegs

EXIT
MAIN ENDP
END MAIN

Click Here to enroll in this course now