Format of National Semiconductor PC87410 EIDE Controller configuration:
Offset	Size	Description	)
 00h 64 BYTEs	header (see #00878)
		(vendor ID 100Bh, device ID D001h)
 10h	DWORD	I/O base address for channel 0 control ports (def: 01F0h)
 14h	DWORD	I/O base address for channel 0 status port (def: 03F6h)
 18h	DWORD	I/O base address for channel 1 control ports (def: 0170h)
 1Ch	DWORD	I/O base address for channel 1 status port (def: 0376h)
 40h	BYTE	IDE Channel 0 timing control
 41h	WORD	IDE Channel 0 read-ahead counter (write-only except bit 15)
 43h	BYTE	IDE Channel 0 function
 44h	BYTE	IDE Channel 1 timing control
 45h	WORD	IDE Channel 1 read-ahead counter (write-only except bit 15)
 47h	BYTE	IDE Channel 1 function
 48h	BYTE	PCI control
 49h  7 BYTEs	unused
 50h 176 BYTEs	??? (unused?)
!!!http://www.national.com/ds/PC/PC87410.pdf p.7
SeeAlso: #00739,#00922