IBM 770 User Manual
Figure
2-8 (Part 2 of 2). UltraBay II Connector Pin Assignments
Pin
Signal
I/O and Feature
51
DD15
I/O
52
GND
GND
53
-UBAY_HDD
I
54
DMARQ
I
55
GND
GND
56
-DIOW
O
57
GND
GND
58
-DIOR
O
59
GND
GND
60
IORDY
I
61
CSEL
O
62
-DMACK
O
63
IRQ
I
64
-IOCS16
I
65
DA1
O
66
-PDIAG
I/O
67
DA0
O
68
DA2
O
69
-CS1
O
70
-CS3
O
71
-DASP
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
2-14 System Board