Wikimore

Function			Dir	Pin		Dir	Function
Comm. Mem.	I/O	True IDE	Dir	Pin		Dir	Comm. Mem.	I/O	True IDE
GND			N/A	1	26	OUT	CD1
D03			BI	2	27	BI	D11
D04			BI	3	28	BI	D12
D05			BI	4	29	BI	D13
D06			BI	5	30	BI	D14
D07			BI	6	31	BI	D15
CE1		CS0	IN	7	32	IN	CE2		CS1
A10		L	IN	8	33	OUT	VS1
OE		ATA SEL	IN	9	34	IN	NU	IORD
A09		L	IN	10	35	IN	NU	IOWR
A08		L	IN	11	36	IN	WE
A07		L	IN	12	37	OUT	READY	IREQ	INTRQ
VCC			N/A	13	38	N/A	VCC
A06		L	IN	14	39	IN	CSEL
A05		L	IN	15	40	IN	VS2
A04		L	IN	16	41	IN	RESET		RESET
A03		L	IN	17	42	OUT	WAIT		IORDY
A02			IN	18	43	OUT	NU	INPACK	NC
A01			IN	19	44	IN	REG		HA
A00			IN	20	45	BI	BVD2 / H	SPKR	DASP
D00			BI	21	46	BI	BVD1 / H	STSCHG	PDIAG
D01			BI	22	47	BI	D08
D02			BI	23	48	BI	D09
WP	IOS16	IOCS16	IN	24	49	BI	D10
CD2			OUT	25	50	N/A	GND

D[15:0] Birdirectional data bus
A[10:0] Address bus
CD1, CD2 Card detect signals. These go low when a card is inserted into a socket.

Practical Electronics/Device pinouts/CompactFlash cards