IDE to CompactFlash (CF) adapter schematic pinout

IDE-Signal	IDE-Pin	Connect to	CF-Signal	CF-Pin		CF-Pin	CF-Signal	Connect to	IDE-Pin	IDE-Signal
-	-	GND	GND	1		26	-CD1	nc	-	-
D03	11		D03	2		27	D11		10	D11
D04	9		D04	3		28	D12		12	D12
D05	7		D05	4		29	D13		14	D13
D06	5		D06	5		30	D14		16	D14
D07	3		D07	6		31	D15		18	D15
-CS0	37		-CE1	7		32	-CE2		38	-CS1
-	-	GND	A10	8		33	-VS1	GND	-	-
-	-	GND	-OE	9		34	-IORD		25	-IOR
-	-	GND	A09	10		35	-IOWR		23	-IOW
-	-	GND	A08	11		36	-WE	nc	-	-
-	-	GND	A07	12		37	-RDY/ -BSY/ -IREQ		31	INTRQ/IRQ14
-	-	Vcc	Vcc	13		38	Vcc	Vcc	-	-
-	-	GND	A06	14		39	-CSEL	-Master/ Slave	-	-
-	-	GND	A05	15		40	-VS2	nc	-	-
-	-	GND	A04	16		41	-Reset		1	-Reset
-	-	GND	A03	17		42	-WAIT		27	IOCHRDY
A02	36		A02	18		43	-INPACK	nc	-	-
A01	33		A01	19		44	-REG	Vcc	-	-
A00	35		A00	20		45	BVD2	LED *	39	-Active
D00	17		D00	21		46	BVD1		34	reserved
D01	15		D01	22		47	D08		4	D08
D02	13		D02	23		48	D09		6	D09
-IOCS16	32		WP/-IOCS16	24		49	D10		8	D10
-	-	nc	-CD2	25		50	GND	GND	-	-

* LED via 1KOhm to Vcc

Tip how to know which keys are 1-25 and 26-50:
It is known that CF keys 1, 25, 26, 50 is grounded (still mirror riddle) and only one more grounded key 33 is answer. If you look picture how Female connector looks, then key 33 is 8th hole from left in upper-row. Now just get a chain-link using your resistance-tester for any key 1, 25, 26 or 50 to this 8ght hole by turning CF card upsidedown. When you got link, then you know where is key 33, so left is 26, right is 50 and down-left is 1 and down-right is 25. Note: use picture from this side for pin assigment.