298 #define UNIT(x)		((x) & 0x03)		/* drive on fdc */  macro
739 	if (!(FDCS->dor & (0x10 << UNIT(drive))) ||  in disk_change()
740 	    (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {  in disk_change()
825 	fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);  in twaddle()
903 	unsigned char mask = ~(0x10 << UNIT(nr));  in motor_off_callback()
914 	if (!(FDCS->dor & (0x10 << UNIT(drive))))  in floppy_off()
951 		if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &  in scandrives()
952 		      (0x10 << UNIT(drive))))  in scandrives()
955 			set_dor(fdc, ~(0x10 << UNIT(drive)), 0);  in scandrives()
1285 				output_byte(UNIT(current_drive));  in fdc_specify()
1539 		output_byte(UNIT(current_drive));  in check_wp()
1587 				set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);  in seek_floppy()
1606 	output_byte(UNIT(current_drive));  in seek_floppy()
1718 		} while ((ST0 & 0x83) != UNIT(current_drive) &&  in floppy_interrupt()
1737 	if (output_byte(UNIT(current_drive)) < 0)  in recalibrate_floppy()
1861 	data = UNIT(current_drive);  in start_motor()
1863 		if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {  in start_motor()
1869 			data |= (0x10 << UNIT(current_drive));  in start_motor()
1871 	} else if (FDCS->dor & (0x10 << UNIT(current_drive)))  in start_motor()
1872 		mask &= ~(0x10 << UNIT(current_drive));  in start_motor()
2107 	DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);  in setup_format_params()
2585 	DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);  in make_raw_rw_request()
3441 		ret = fd_eject(UNIT(drive));  in fd_locked_ioctl()