Assembly Print Date and Time

I'm currently work on printing the date to the screen. It prints to the screen but the wrong numbers. First run it prints 0</00/00, Second 0:/00/00, and last run 18/00/00. It seems to be printing in ascii. All I have is the month part now, if I could only figure this out then I could finish the rest of the date (day and year)

;NASM Template

;CS2650 Assembler Program #2

;Casey Jenkins

;

[BITS 16] ;Set code generation to 16 bit mode

%include 'exebin.mac' ;include file to simulate .com header



EXE_Begin ;assembler directive to indicate executable begin



[ORG 100H] ;set addressing to begin at 100H





dtfld: db'00/00/0000'





start:

;CLEARS SCREEN AND SCROLL AREA



mov ah,06h ;function 06h (Scroll Screen)

mov al,0 ;scroll all lines

mov bh,000 ;Attribute (black)

mov ch,0 ;Upper left row is zero

mov cl,0 ;Upper left column is zero

mov dh,23 ;Lower left row is 28

mov dl,79 ;Lower left column is 79

int 10H ;BIOS Interrupt 10h (video services)



;DISPLAYS NAME TO SCREEN



mov ah,13h ;function 13h (Display String)

mov al,0 ;Write mode is zero

mov bh,0 ;Use video page of zero

mov bl,0Ch ;Attribute (Red Text)

mov cx,13 ;Character string is 25 long

mov dh,4 ;position on row 4

mov dl,0 ;and column 28

push ds ;put ds register on stack

pop es ;pop it into es register

lea bp,[msg] ;load the offset address of string into BP

int 10H







;GET DATE FROM SYSTEM

;;;;;;;;;;;;;;;; GET MONTH ;;;;;;;;;;;;;;;;;;;;;;;;;;;;

mov ah,1AH

int 21h

mov bh,dh ;copy contents to bh

shr bh,1 ;shift one bit

shr bh,1

shr bh,1

shr bh,1

or bh,30h ;add 30 to convert to ascii

mov [dtfld],bh

mov bh,dh

and bh,0fh

or bh,30h

mov [dtfld + 1],bh

int 04h





;DISPLAY DATE TO SCREEN



mov ah,13h ;function 13h (Display String)

mov al,0 ;Write mode is zero

mov bh,0 ;Use video page of zero

mov bl,0Ch ;Attribute (Red Text)

mov cx,8 ;Character string is 25 long

mov dh,5 ;position on row 4

mov dl,0 ;and column 28

;push ds ;put ds register on stack

;pop es ;pop it into es register

lea bp,[dtfld] ;load the offset address of string into BP

int 10H



msg:

db'CASEY JENKINS'





int 20h ;halt operation (VERY IMPORTANT!!!)





EXE_End

Int 21h Function 1Ah sets the DTA - which has nothing to do with dates.

I suspect what you wanted was BIOS Int 1A function 0