org 0x0000
                mov     ax,0x07c0                               
                push    ax ax ax                                
                pop     ds es ss
                mov     sp,0xfffe                               
                mov     ax,0x1301                               
                mov     bx,0x02                                 
                mov     cx,28                                   
                mov     dx,0                                    
                mov     bp,welcome      
                int     0x10
                
                mov             al,loding                     ;display error, is can't loding string  system on loding.....
                mov             cx,20
                mov     bx,02
                mov     ah,0x0e
                int             0x10
                welcome         db '==== Welcome to MyOS! ====',13,10
                loding          db 'System on loding....',13,10
                times 510-($-$$) db 0x90
                dw 0xaa55

    

al is an 8-bit register. You'll need at least a 16-bit register. Try using dx.

You'll need to follow the int 0x10 register expectations. I showed dx as an example. But if int 0x10 uses another register then you'll have to use that.

But whatever you do you will need a 16-bit register.

mov al, [loding]    

https://en.wikipedia.org/wiki/INT_10H

On AH=0Eh it says AL is a character, and you instead pass it the address of your string.

You'll probably need a loop and use instead:

Code:

mov al, [loding]    

1 character at a time.

Or use AH=13H it seems it's made for writing strings?

                                       mov si,loding
                                          lodsb 
                                       or al,al 
                                       jz end_s
                                      mov ah,0x0e
                                     mov bx,02
                                      int 0x10
    

mov si, loding
mov cx, 20
mov bx, 2
mov ah, 0x0e
@@:
  lodsb
  int 0x10
  cmp al, 10  ; check for newline (your string does NOT have null terminator)
  jnz @b    

What is your code supposed to be doing? You need to put the entire int 0x10 in a loop, together with lodsb.

Code:

mov si, loding
mov cx, 20
mov bx, 2
mov ah, 0x0e
@@:
  lodsb
  int 0x10
  cmp al, 10  ; check for newline (your string does NOT have null terminator)
  jnz @b    

Though I've almost no experience programming with the BIOS, so can't help you more than this.

BTW it's spelled loading.

oh keeeeerrrrrrr friend

i hope u die somewherre in your boot program before it gets to the signature. C'mon, your english is getting worse for every posts right from last year! I've improved my english so much since then. You??

kerrrr... please die!