PORTIBM PC Portable (uses same BIOS as XT) 0370-0377 - FDC 2	(2nd Floppy Disk Controller)	first FDC at 03F0
Note:	floppy disk controller is usually an 8272, 8272A, NEC765 (or
	  compatible), or an 82072 or 82077AA for perpendicular recording at
	  2.88M
SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 03F0h-03F7h

0370  R-  diskette Extra High Density controller board jumpers (ATIBM PC AT)
0370  R-  diskette controller status A (PS/2IBM PS/2, any model, PS/2IBM PS/2, any model model 30)
0371  R-  diskette controller status B (PS/2IBM PS/2, any model, PS/2IBM PS/2, any model model 30)
0372  -W  diskette controller DOR (Digital Output Register)
0374  R-  diskette controller main status register
0374  -W  diskette controller datarate select register
0375  RW  diskette controller command/data register
0376  RW  (2nd FIXED disk controller status/data register)
0377  RW  (2nd FIXED disk controller drive address register)
0377  R-  diskette controller DIR (Digital Input Register)
0377  -W  select register for diskette data transfer rate