unsigned char find_mask()
{

unsigned char mask, a, b, var, *pBuff;

for(a = 0; a < 16; pBuff += 2, ++a)
{
var = *(char*)pBuff;
for(b = 0; b < 8; ++b)
{
if (mask == (var << b)) return a*16+b;
}
}

}