Signal Descriptions
B-5
B
B.4 SCSI
This connector is located on the back panel of the system board.
Figure B-5
SCSI Connector
Table B-4 SCSI Pin Assignments
Pin
Signal Name
Description
Pin
Signal Name
Description
1
gnd
Ground
26
scsi dat 0
SCSI data 0
2
gnd
Ground
27
scsi dat 1
SCSI data 1
3
gnd
Ground
28
scsi dat 2
SCSI data 2
4
gnd
Ground
29
scsi dat 3
SCSI data 3
5
gnd
Ground
30
scsi dat 4
SCSI data 4
6
gnd
Ground
31
scsi dat 5
SCSI data 5
7
gnd
Ground
32
scsi dat 6
SCSI data 6
8
gnd
Ground
33
scsi dat 7
SCSI data 7
9
gnd
Ground
34
scsi par 0
SCSI parity 0
10
gnd
Ground
35
gnd
Ground
11
gnd
Ground
36
No connect
12
gnd
Ground
37
gnd
Ground
13
vcc
Vcc
38
Termpower
Termpower
14
gnd
Ground
39
gnd
Ground
15
gnd
Ground
40
gnd
Ground
16
gnd
Ground
41
scsi atn l
SCSI attention
17
gnd
Ground
42
gnd
Ground
18
gnd
Ground
43
scsi bsy l
SCSI busy
19
gnd
Ground
44
scsi ack l
SCSI acknowledge
20
gnd
Ground
45
scsi reset l
SCSI reset
25
50
1
26
Summary of Contents for Ultra 1 140
Page 6: ......
Page 8: ...Sun Ultra 1 Series Service Manual November 1995...
Page 12: ...x Sun Ultra 1 Series Service Manual November 1995 Glossary Glossary 1 Index Index 1...
Page 23: ...Part1 SystemInformation Product Description page 1 1...
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Page 28: ...1 4 Sun Ultra 1 Series Service Manual November 1995 1...
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Page 46: ...3 14 Sun Ultra 1 Series Service Manual November 1995 3...
Page 62: ...4 16 Sun Ultra 1 Series Service Manual November 1995 4...
Page 63: ...Part3 PreparingforService Safety and Tool Requirements page 5 1 Power On and Off page 6 1...
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Page 68: ...5 4 Electron Service Manual November 1995 5...
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Page 108: ...8 32 Sun Ultra 1 Series Service Manual November 1995 8...
Page 121: ...Part5 SystemBoard System Board and Component Replacement page 10 1...
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Page 147: ...Part6 IllustratedPartsBreakdown Replacement Parts page 11 1...
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Page 166: ...C 4 Sun Ultra 1 Series Service Manual November 1995 C...
Page 170: ...Glossary 4 Sun Ultra 1 Series Service Manual November 1995...
Page 174: ...Index 4 Sun Ultra 1 Series Service Manual November 1995...