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org 0h inizio: call initgr mov [px2],10 mov [py2],10 ciclo: mov ah,00h int 16h mov al,4dh ; Freccia destra cmp ah,al je incx mov al,4bh ; Freccia sinistra cmp ah,al je decx mov al,50h ; Freccia gių cmp ah,al je incy mov al,48h ; Freccia su cmp ah,al je decy returnc: call dispx jmp ciclo ;######## Funzioni ######### incx: mov ah,[px1] mov al,[px2] inc ax mov [px1],ah mov [px2],al jmp returnc decx: mov ah,[px1] mov al,[px2] dec ax mov [px1],ah mov [px2],al jmp returnc incy: mov ah,[py1] mov al,[py2] inc ax mov [py1],ah mov [py2],al jmp returnc decy: mov ah,[py1] mov al,[py2] dec ax mov [py1],ah mov [py2],al jmp returnc dispx: mov ah,0ch mov al,04h ; Colore Rosso mov ch,[px1] mov cl,[px2] ; X mov dh,[py1] mov dl,[py2] ; Y mov bx,01h ; Pagina int 10h ret initgr: mov ah,00h mov al,10h ; 640x350 int 10h ret ;######## Variabili ######### px1 db 0 px2 db 0 py1 db 0 py2 db 0
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