$\mathrm{.}386$

include Irvine$32.$inc

$.$data

; Date value in AX register $($e$.$g$.,0$x$00241503$ for December $3,2004)$

dateValue dw $0024,12,03$

$.$code

FATDate proc

; Extract day, month, and year from dateValue

;YEAR

mov cx$,$ dateValue

shr cx$,0$ ; Shift right to get year

mov dx$,$ cx ; Store year in DX register

add dx$,1980$

; MONTH $($bits $4$ & $5)$

mov cx$,$ dateValue

and cx$,00000110$b ; Mask to isolate month bits $(4$ & $5$ position$)$

shr cx$,4$ ; Shift right by $4$ to position month $($bits $0$ & $1)$

mov bl$,$ cl ; Store month in BL register

; DAY $($bits $0$ & $1)$

mov cx$,$ dateValue

and cx$,00000011$b ; Mask to isolate day bits $(0$ & $1$ position$)$

mov bh$,$ cl ; Store day in AL register

ret

FATDate endp

main proc

lea ax$,$ dateValue

;mov ds$,$ ax

; Call the FATDate procedure

call FATDate

; Display day

movzx eax, bl ; Day to EAX $($zero$-$extended to clear upper bits$)$

call WriteDec

call Crlf

; Display month

movzx eax, bh ; Month to EAX $($zero$-$extended to clear upper bits$)$

call WriteDec

call Crlf

; Display year

movzx eax, dx ; Year to EAX $($zero$-$extended to clear upper bits$)$

call WriteDec

call Crlf

invoke ExitProcess, $0$

main endp

end main

DisplayNumber proc

; Display a $16-$bit number $($year$)$

push ax

push bx

push cx

push dx

mov bx$,10$

xor cx$,$ cx

DisplayLoop:

div bx

add dl$,\text{'}0\text{'}$

push dx

inc cx

test ax$,$ ax

jnz DisplayLoop

PrintLoop:

pop dx

mov ah$,2$

int $21$h

loop PrintLoop

pop dx

pop cx

pop bx

pop ax

ret

DisplayNumber endp

main endp

end main

The year outputs correctly, but the month and day don$$t$,$ why is this? Please note this is x$86$ Windows, using the Irvine$32$ library