[ASM]Add two 8 bit numbers

[GB]

The following program adds the two 8 bit numbers,code has been compiled using turbo assembler.

.model small         
.data                                                    
a db 09H
b db 02H
.code
    mov     ax, @data    ; Initialize data section
    mov     ds, ax
    mov     al, a        ; Load number1 in al
    mov     bl, b        ; Load number2 in bl
    add     al, bl        ; add numbers and result in al
    mov     ch, 02h    ; Count of digits to be displayed
    mov     cl, 04h    ; Count to roll by 4 bits
    mov     bh, al        ; Result in reg bh
l2: rol       bh, cl        ; roll bl so that msb comes to lsb 
    mov     dl, bh        ; load dl with data to be displayed
    and     dl, 0fH    ; get only lsb
    cmp     dl, 09        ; check if digit is 0-9 or letter A-F
    jbe     l4
    add     dl, 07        ; if letter add 37H else only add 30H
l4:    add     dl, 30H
    mov     ah, 02; Function 2 under INT 21H (Display character)
    int     21H
    dec     ch        ; Decrement Count
    jnz     l2
    mov     ah, 4CH    ; Terminate Program
    int     21H
    end

[GB]

One can also compile it using Yasm.

Yasm can be downloaded here - http://www.tortall.net/projects/yasm/

[Gaurav]

This program successfully compiled on turbo assembler...
great!