HP 9000 Series 500 Handbook page 15

98760 Troubleshooting 4-3
PI
P2
To Alpha/Interface Board (A 73)
To Alpha/Interface Board (A73)
Connector P3; Power
Connector P4; lOP Bus
SGND 50 49 SGND GND
50 49
NBR
SGND 48
47
SGND NWAIT 48 47 GND
SGND 46 45
SGND
NFLG 46 45
NSTS
SGND
44 43
SGND NRAMD 44
43
GND
18
42 41
18 READ 42 41 GND
18 40 39 -18 NPOLL 40 39 GND
-18 38 37 -18 NIFC 38 37 GND
DGND 38 35 DGND NIOBSB 36 35 GND
DGND 34 33 DGND NIODO 34
33
NIODl
DGND 32 31 DGND GND 32 31 NIOD2
DGND 30 29 DGND NIOD3
30 29
GND
DGNO
28
27 DGND NIOD4 28 27 NIOD5
12 26
25 12
GND 26 25 NIOD6
12
24 23 -12 NIOD7 24
23
GND
-12
22 21 5 NIOD8 22 21 NIOD9
5 20
19
GND 20 19 NIOD10
18 17 NIODll 18 17 GND
16 15 NIOD12 16 15 NIOD13
14 13 GND 14 13 NIOD14
12 11 NIOD15 12 11 GND
10 9
NIC4 10 NIC3
GND
8
NIC2
NICl 6 GND
NPAO NPAl
NPA2 GND
Mainframe To Display Connectors Pin Location