Scsi Connectors; Table 5-23. Ultra Scsi Connector - Compaq Deskpro 4000 Technical Reference Manual

Chapter 5 Input/Output Interfaces

SCSI CONNECTORS

5.9.1
The SCSI adapter includes two interface connections; an externally accessable SCSI connector
(Figure 5-11) and an internal SCSI connector on the system board that is connected with the
standard hard drive. The SCSI adapter supports only one connector at a time.
Figure 5–14. Ultra SCSI Connector (50-pin, as viewed from rear of chassis)
Table 5–23. Ultra SCSI Connector Pinout
Pin Signal
1 GND
2 GND
3 GND
4 GND
5 GND
6 GND
7 GND
8 GND
9 GND
10 GND
11 GND
12 GND
13 RSVD
14 GND
15 GND
16 GND
17 GND
18 GND
19 GND
20 GND
21 GND
22 GND
23 GND
24 GND
25 GND
5-40 Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
Table 5-23.
Ultra SCSI Connector Pinout
Function Pin
Ground 26
Ground 27
Ground 28
Ground 29
Ground 30
Ground 31
Ground 32
Ground 33
Ground 34
Ground 35
Ground 36
Ground 37
Reserved 38
Ground 39
Ground 40
Ground 41
Ground 42
Ground 43
Ground 44
Ground 45
Ground 46
Ground 47
Ground 48
Ground 49
Ground 50
First Edition – October 1997
Pin 1
Signal Function
DB0- Data Bit 0
DB1- Data Bit 1
DB2- Data Bit 2
DB3- Data Bit 3
DB4- Data Bit 4
DB5- Data Bit 5
DB6- Data Bit 6
DB7- Data Bit 7
DBP Data Bus Pulse
GND Ground
GND Ground
GND Ground
TERMPWR Termination Power
GND Ground
GND Ground
ATN- Attention
GND Ground
BSY- Busy
ACK- Acknowledge
SBRST- Burst
MSG- Message Activity
SEL- Select
C-/D Control/Data Transfer Indicator
REQ- Request
I-/O Input/Output Indicator