SMART_PRINTREG
SMART_PRINTREG("\tcontrol register:\t", reg_ctl);
SMART_PRINTREG("\tfeatures register:\t", reg_feat);
SMART_PRINTREG("\tsector count register:\t", reg_seccnt);
SMART_PRINTREG("\tLBA Low register:\t", reg_lbalo);
SMART_PRINTREG("\tLBA Mid register:\t", reg_lbamid);
SMART_PRINTREG("\tLBA High register:\t", reg_lbahi);
SMART_PRINTREG("\tdevice register:\t", reg_dev);
SMART_PRINTREG("\tcommand register:\t", reg_cmd);