IBM 560E manual 11. DIMM Connector Pin Assignments, Signal

Pin	Signal		Pin	Signal				Pin		Signal
1	Ground			49	MD42				97	MD25
2	Ground			50	MD21				98	MD38
3	MD15			51	MD41				99	MD24
4	MD48			52	MD22				100	MD39
5	MD14			53	MD40				101	+3.3V		dc
6	MD49			54	MD23				102	+3.3V		dc
7	MD13			55	Ground				103	MA6
8	MD50			56	Ground				104	MA7
9	MD12			57	Ground				105	MA8
10	MD51			58	Ground				106	MA11
11	+3.3V	dc			59	Ground			107	Ground
12	+3.3V	dc			60	Ground			108	Ground
13	MD11			61	not		connected		109	MA9
14	MD52			62	Not	connected			110	Ground
15	MD10			63	+3.3V			dc	111MA10
16	MD53			64	+3.3V			dc	112Ground
17	MD9			65	Not	connected			113	+3.3V		dc
18	MD54			66	Not	connected			114	+3.3V		dc
19	MD8			67	−WE				115	−CAS3
20	MD55			68	Not connected				116	−CAS4
21	Ground			69	−RAS2				117	−CAS7
22	Ground			70	Not		connected		118	−CAS0
23	−CAS1			71	−RAS3				119	Ground
24	−CAS6			72	Not	connected			120	Ground
25	−CAS5			73	Ground				121	MD56
26	−CAS2			74	Not	connected			122	MD7
27	+3.3V	dc			75	Ground			123	MD57
28	+3.3V	dc			76	Ground			124	MD6
29	MA0			77	Ground				125	MD58
30	MA3			78	Ground				126	MD5
31	MA1			79	Ground				127	MD59
32	MA4			80	Ground				128	MD4
33	MA2			81	+3.3V			dc	129	+3.3V		dc
34	MA5			82	+3.3V			dc	130	+3.3V		dc
35	Ground			83	MD31				131	MD60
36	Ground			84	MD32				132	MD3
37	MD47			85	MD30				133	MD61
38	MD16			86	MD33				134	MD2
39	MD46			87	MD29				135	MD62
40	MD17			88	MD34				136	MD1
41	MD45			89	MD28				137	MD63
42	MD18			90	MD35				138	MD0
43	MD44			91	Ground				139	Ground
44	MD19			92	Ground				140	Ground
45	+3.3V	dc			93	MD27			141	IòC	Data
46	+3.3V	dc			94	MD36			142	IòC	Clock
47	MD43			95	MD26				143	+3.3V		dc
48	MD20			96	MD37				144	+3.3V		dc

Figure 2-11. DIMM Connector Pin Assignments

ThinkPad 560/560E System Board 2-15