内置SCSI卡接口定义图(单端信号方式)
SCSI 是 Small Computer System Interface 的缩写，在控制器和设备侧的接口外观为 50 针公插座：
连接电缆为 50 针母插头：
引脚定义
Pin
Name
Dir
DescripTIon
2
DB0
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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
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Ground
22
GND
Ground
24
GND
Ground
26
TMPWR
TerminaTIon Power
28
GND
Ground
30
GND
Ground
32
/ATN
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AttenTIon
34
GND
Ground
36
/BSY
Busy
38
/ACK
Acknowledge
40
/RST
Reset
42
/MSG
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Message
44
/SEL
Select
46
/C/D
Control/Data
48
/REQ
Request
50
/I/O
Input/Output
