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| assume cs:code,ds:data,ss:stack
data segment
array db 88h,0FFh,0Fh,0CCh,3Fh
number db '0123456789ABCDEF'
data ends
stack segment
db 128 dup (0)
stack ends
code segment
start: mov ax,stack
mov ss,ax
mov sp,128
call init_reg
call show_byte
mov ax,4c00h
int 21h
;====================================================
show_byte: mov si,offset array
mov di,160*10+40*2
mov cx,5
showByte: mov al,ds:[si]
call show_hex
inc si
loop showByte
ret
;====================================================
show_hex: jmp showHex
showHex: mov ah,al
and al,00001111B
shr ah,1
shr ah,1
shr ah,1
shr ah,1
mov bx,0
mov bl,al
mov al,ds:number[bx]
mov bl,ah
mov ah,ds:number[bx]
mov es:[di],ah
mov es:[di+2],al
add di,6
ret
;====================================================
init_reg: mov bx,0B800H
mov es,bx
mov bx,data
mov ds,bx
ret
code ends
end start
|