hi,

try this

_asm{
mov ax,06h
int 10h
};

and if still not works

u
nsigned int i,far* vb = (unsigned int far *)0x0b8000000;

for(i=0,;i<2000;i++) *(vb + i)= 0x0f;

i assumed you are using text mode (25x80).

good luck

abhishek