ks0127_read
if ((ks0127_read(sd, KS_STAT) & 0x80) == 0) {
switch (ks0127_read(sd, KS_CMDE) & 0x0f) {
if (!(ks0127_read(sd, KS_DEMOD) & 0x40))
status = ks0127_read(sd, KS_STAT);