SBIC_DATA
sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]);
sbic_arm_write(host, SBIC_DATA, NOP);
sbic_arm_write(host, SBIC_DATA, msg->msg[0]);
host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA);
message = sbic_arm_read(host, SBIC_DATA);
lun = sbic_arm_read(host, SBIC_DATA) & 7;