tag	line	file	source code
HD_CMD	200	drivers/block/hd.c	outb_p(hd_info[drive].ctl,HD_CMD);
HD_CMD	231	drivers/block/hd.c	outb_p(4,HD_CMD);
HD_CMD	233	drivers/block/hd.c	outb(hd_info[0].ctl & 0x0f ,HD_CMD);