在这个问题中，我需要跟踪对寄存器和变量的所有更改。包括MAR，MDR，EAX，EBX和EDX。 这是代码

; Description:  This program gets the age of the user and and calculates their age in dog years (age x 7).
INCLUDE Irvine32.inc

.data
age     DWORD   ?                           ; User's age (0x1000)
hi_there    BYTE    "Hi there,this is Paris",0             ; Greeting the user (0x1004)
prompt1 BYTE    "Can I have your age please?",0         ; Gets age (0x1008)
output      BYTE    "So,your age in dog years is: ",0          ; Reposts dog age (0x100C)
byebye      BYTE    "Thanks for passing by,have a great day!",0    ; Bye bye (0x1010)

.code
main PROC
; Greet the user
    mov EDX,OFFSET hi_there        ; Set up for call to WriteString and greet the user
    call    WriteString
    call    Crlf
; Gets the user's age
    mov EDX,OFFSET prompt1     ; Asks the user's age
    call    WriteString
    call    Crlf
    call    ReadInt         ; Reads the users age. Age in EAX
    call    Crlf

; Calculate the dog years and stores the dog age 
    mov EBX,7
    mul EBX
    mov age,EAX            ; Stores the users dog age. Dog age also in EAX

; Reports the dog years and says bye
    mov EDX,OFFSET output
    call    WriteString
    mov EAX,age
    call    WriteDec
    call    Crlf
    mov EDX,OFFSET byebye
    call    WriteString
    call    Crlf
    exit                ;exit to operating system

main ENDP
END main

给出的步骤位于红色中，其余的就是我所做的。为了便于阅读，我特别强调了MAR，MDR，EAX，EBX，EDX和年龄发生变化的任何时候，因为其他所有步骤都发生了变化。

请让我知道这是否正确，我在互联网上的其他地方找不到有关更改注册的任何帮助