Compaq 164SX Eide Drive Bus Connector Pinouts, 4shows the Eide drive bus connector pinouts

EIDE Drive Bus Connector Pinouts

Table 4–3 SDRAM DIMM Connector Pinouts (J7 through J10) 1							(Sheet 2 of 2)
Pin	Signal	Pin	Signal	Pin	Signal	Pin	Signal
125	CK1	126	BA12	127	Gnd	128	CKE0
129		130	DQMB6	131	DQMB7	132	PD3
	S3
133	+3V	134	NC	135	NC	136	CB6
137	CB7	138	Gnd	139	DQ48	140	DQ49
141	DQ50	142	DQ51	143	+3V	144	DQ52
145	NC	146	NC	147	PD	148	Gnd
149	DQ53	150	DQ54	151	DQ55	152	Gnd
153	DQ56	154	DQ57	155	DQ58	156	DQ59
157	+3V	158	DQ60	159	DQ61	160	DQ62
161	DQ63	162	Gnd	163	CK3	164	NC
165	SA0	166	SA1	167	SA2	168	+3V

1Pins 1 through 84 are on the front side and pins 85 through 168 are on the back side.

2The AlphaPC 164SX uses BA1 as both BA1 and ADDR12. Therefore, four-bank DIMMs using ADDR[11:0] are the maximum size. (Two-bank DIMMs can use ADDR[12:0].)

3Pull-down.

4.4 EIDE Drive Bus Connector Pinouts

Table 4–4shows the EIDE drive bus connector pinouts.

Table 4–4 EIDE Drive Bus Connector Pinouts (J5, J6)

Pin	Signal	Pin	Signal	Pin		Signal	Pin	Signal
1		2	Gnd	3		IDE_D7	4	IDE_D8
	RESET
5	IDE_D6	6	IDE_D9	7	IDE_D5		8	IDE_D10
9	IDE_D4	10	IDE_D11	11	IDE_D3		12	IDE_D12
13	IDE_D2	14	IDE_D13	15	IDE_D1		16	IDE_D14
17	IDE_D0	18	IDE_D15	19	Gnd		20	NC (key pin)
21	MARQ	22	Gnd	23			24	Gnd
					IOW
25		26	Gnd	27		CHRDY	28	BALE
	IOR
29	MACK	30	Gnd	31	IRQ		32
								IOCS16
33	ADDR1	34	NC	35		ADDR0	36	ADDR2
37		38		39			40	Gnd
	CS0		CS1			ACT

AlphaPC 164SX Connector Pinouts 4–5