IBM ThinkPad 600, Reference Manual

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Figure 2-9 (Part 2 of 2). UltraSlim Bay Connector Pin Assignments
Pin Signal I/O and Feature
51 SDD15 I/O
52 GND GND
53 UBAYID0 I
54 -SDREQ I
55 GND GND
56 -SDIOW O
57 GND GND
58 -SDIOR O
59 GND GND
60 SIORDY I
61 UBAYSLAVE O
62 -SDACK O
63 IRQ I
64 Reserved I
65 SDA1 O
66 -PDIAGHDD I/O
67 SDA0 O
68 SDA2 O
69 -CS1S O
70 -CS3S O
71 -DASPUBAY I
72 -MCS O
73 CD_MUTE I
74 AUDIO_RTN I
75 CD_L_IN I
76 CD_R_IN I
77 GND GND
78 GND GND
79 -UBAYID3 I
80 -UBAYID4 I
System Board 2-13