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SCSI Internal (Single-ended)
SCSI=Small Computer System Interface.
Based on an original design by Shugart Associates. SCSI was
ratified in 1986.
(At the controller & harddisk)
(At the cable.)
50 PIN IDC MALE at the controller & harddisk.
50 PIN IDC FEMALE at the cable.
Pin
Name
Dir
Description
2
DB0
Data Bus 0
4
DB1
Data Bus 1
6
DB2
Data Bus 2
8
DB3
Data Bus 3
10
DB4
Data Bus 4
12
DB5
Data Bus 5
14
DB6
Data Bus 6
16
DB7
Data Bus 7
18
PARITY
Data Parity (odd Parity)
20
GND
Ground
22
GND
Ground
24
GND
Ground
26
TMPWR
Termination Power
28
GND
Ground
30
GND
Ground
32
/ATN
Attention
34
GND
Ground
36
/BSY
Busy
38
/ACK
Acknowledge
40
/RST
Reset
42
/MSG
Message
44
/SEL
Select
46
/C/D
Control/Data
48
/REQ
Request
50
/I/O
Input/Output
Note: Direction is Device relative Bus (other Devices).
All odd-numbered pins, except pin 25, are connected to
ground. Pin 25 is left open.
Contributor: Joakim Ögren
Source: ?
Please send any comments to Joakim Ögren.