What does this code does with comments for each line please.? Explain the logic of the program how it achieves its purpose. .model small .386 .stack 100h .data msg1 db 13, 10, "Enter any number --> ", "$" msg2 db "Enter an operation +,- * or / --> ",13, 10, "$" msg3 db "The Operation is --> ", "$" msg4 db "The result is --> ", "$" By_base dd 21 by_10 dd 10 sp_counter db 0 disp_number dd 0 disp_number2 dd 0 disp_number3 dd 0 op_type db 0 last_key dd 0 remainder db 0 .code main proc mov ax,@data mov ds,ax mov dx,offset msg1 call display_message call m_keyin call operation mov dx,offset msg1 call display_message call m_keyin cmp op_type, "+" jnz short skip_plus call op_plus skiP_plus: cmp op_type, "-" jnz short skip_minus call op_minus skip_minus: cmp op_type, "*" jnz short skip_mul call op_mult skip_mul: cmp op_type, "/" jnz short skip_div call op_div skip_div: call m_display mov ax, 4c00h int 21h operation proc mov dx,offset msg2 rpt4: call display_message mov dx,offset msg3 call display_message mov ah, 1 int 21h cmp al, 30h jns rpt4 mov op_type, al ret operation endp m_display proc mov dx,offset msg4 call display_message mov eax, disp_number mov sp_counter, 0 Base_lp: LP1: mov edx, 0 div By_Base push dx inc sp_counter cmp eax, 0 jnz lp1 LP2: pop dx call display dec sp_counter jnz lp2 mov edx, -8 call display mov edx, by_base call display mov edx, -7 call display dec By_base mov eax, disp_number cmp By_base, 1 jnz Base_lp ret m_display endp op_minus proc mov eax, disp_number2 sub eax, disp_number3 mov disp_number, eax ret op_minus endp op_div proc mov eax, disp_number2 div disp_number3 mov disp_number, eax mov remainder, dl call display call m_display mov dl, -16 call display mov dl, remainder call display mov dl, -1 call display mov edx, disp_number3 call display mov ax, 4c00h int 21h op_div endp op_mult proc mov eax, disp_number2 mul disp_number3 mov disp_number, eax ret op_mult endp op_plus proc mov eax, disp_number2 add eax, disp_number3 mov disp_number, eax ret op_plus endp display proc add dl, 30h cmp dl, 3ah js short skip_hex add dl, 7 Skip_hex: mov ah, 6 int 21h ret display endp display_message proc mov ah, 9 int 21h mov edx, 0 ret display_message endp m_keyin proc MOV disp_number, 0 mov last_key, 0 LP_key:; location in the program label mov eax, disp_number mul by_10 ; eax = (eax) * 10 add eax, last_key mov DISP_NUMBER, eax mov ah, 1 int 21h AND eax, 000000ffh cmp al, 13 jz short finkey sub al, 30h MOV LAST_KEY, EAX jmp lp_key finkey: MOV eax, DISP_NUMBER cmp DISP_NUMBER2,0 jnz short skip MOV DISP_NUMBER2, EAX skip: MOV DISP_NUMBER3, EAX ret m_keyin endp main endp end main
What does this code does with comments for each line please.?
Explain the logic of the
.model small
.386
.stack 100h
.data
msg1 db 13, 10, "Enter any number --> ", "$"
msg2 db "Enter an operation +,- * or / --> ",13, 10, "$"
msg3 db "The Operation is --> ", "$"
msg4 db "The result is --> ", "$"
By_base dd 21
by_10 dd 10
sp_counter db 0
disp_number dd 0
disp_number2 dd 0
disp_number3 dd 0
op_type db 0
last_key dd 0
remainder db 0
.code
main proc
mov ax,@data
mov ds,ax
mov dx,offset msg1
call display_message
call m_keyin
call operation
mov dx,offset msg1
call display_message
call m_keyin
cmp op_type, "+"
jnz short skip_plus
call op_plus
skiP_plus:
cmp op_type, "-"
jnz short skip_minus
call op_minus
skip_minus:
cmp op_type, "*"
jnz short skip_mul
call op_mult
skip_mul:
cmp op_type, "/"
jnz short skip_div
call op_div
skip_div:
call m_display
mov ax, 4c00h
int 21h
operation proc
mov dx,offset msg2
rpt4:
call display_message
mov dx,offset msg3
call display_message
mov ah, 1
int 21h
cmp al, 30h
jns rpt4
mov op_type, al
ret
operation endp
m_display proc
mov dx,offset msg4
call display_message
mov eax, disp_number
mov sp_counter, 0
Base_lp:
LP1:
mov edx, 0
div By_Base
push dx
inc sp_counter
cmp eax, 0
jnz lp1
LP2:
pop dx
call display
dec sp_counter
jnz lp2
mov edx, -8
call display
mov edx, by_base
call display
mov edx, -7
call display
dec By_base
mov eax, disp_number
cmp By_base, 1
jnz Base_lp
ret
m_display endp
op_minus proc
mov eax, disp_number2
sub eax, disp_number3
mov disp_number, eax
ret
op_minus endp
op_div proc
mov eax, disp_number2
div disp_number3
mov disp_number, eax
mov remainder, dl
call display
call m_display
mov dl, -16
call display
mov dl, remainder
call display
mov dl, -1
call display
mov edx, disp_number3
call display
mov ax, 4c00h
int 21h
op_div endp
op_mult proc
mov eax, disp_number2
mul disp_number3
mov disp_number, eax
ret
op_mult endp
op_plus proc
mov eax, disp_number2
add eax, disp_number3
mov disp_number, eax
ret
op_plus endp
display proc
add dl, 30h
cmp dl, 3ah
js short skip_hex
add dl, 7
Skip_hex:
mov ah, 6
int 21h
ret
display endp
display_message proc
mov ah, 9
int 21h
mov edx, 0
ret
display_message endp
m_keyin proc
MOV disp_number, 0
mov last_key, 0
LP_key:; location in the program label
mov eax, disp_number
mul by_10 ; eax = (eax) * 10
add eax, last_key
mov DISP_NUMBER, eax
mov ah, 1
int 21h
AND eax, 000000ffh
cmp al, 13
jz short finkey
sub al, 30h
MOV LAST_KEY, EAX
jmp lp_key
finkey:
MOV eax, DISP_NUMBER
cmp DISP_NUMBER2,0
jnz short skip
MOV DISP_NUMBER2, EAX
skip:
MOV DISP_NUMBER3, EAX
ret
m_keyin endp
main endp
end main
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