PORTIBM PC Portable (uses same BIOS as XT) 03F0-03F1 - PCTech RZ1000 IDE(Integrated Drive Electronics) A type of disk drive interface which essentially extends the PCIBM PC's expansion bus all the way to the drive and places the drive controller on the disk drive itself.	 See also ESDI. controller
Note:	to unlock access to these ports instead of the standard floppy
	  controller status ports at these two addresses, you must perform
	  two immediately successive 8-bit OUTs of 55h to PORTIBM PC Portable (uses same BIOS as XT) 03F0h (there
	  is a fairly small time limit between the two accesses, so there
	  should be no other instructions between the two OUTs); after
	  that, values written to PORTIBM PC Portable (uses same BIOS as XT) 03F0h select the data accessed through
	  PORTIBM PC Portable (uses same BIOS as XT) 03F1h until an AAh is written to 03F0h
SeeAlso: #00732

03F0  ?W  index port (see #P0875)
03F1  RW  data port


(Table P0875)
Values for RZ1000 IDE(Integrated Drive Electronics) A type of disk drive interface which essentially extends the PCIBM PC's expansion bus all the way to the drive and places the drive controller on the disk drive itself.	 See also ESDI. controller registers:
 00h	???
	bit 7:
	bit 1:
	bit 0:
 01h	???
 02h	???
 03h	???
 04h	???
 05h	???
	bit 1:
 AAh	lock control port