SIMM 30线内存条引脚定义图
SIMM 是 Single Inline Memory Module (单列直插) 的缩写，最高容量为 4MBx9，在无校验内存条中，QP 和 DP 引脚是空的，外观为：
引脚定义
Pin
Name
DescripTIon
1
VCC
+5 VDC
2
/CAS
Column Address Strobe
3
DQ0
Data 0
4
A0
Address 0
5
A1
Address 1
6
DQ1
Data 1
7
A2
Address 2
8
A3
Address 3
9
GND
Ground
10
DQ2
Data 2
11
A4
Address 4
12
A5
Address 5
13
DQ3
Data 3
14
A6
Address 6
15
A7
Address 7
16
DQ4
Data 4
17
A8
Address 8
18
A9
Address 9
19
A10
Address 10
20
DQ5
Data 5
21
/WE
Write Enable
22
GND
Ground
23
DQ6
Data 6
24
A11
Address 11
25
DQ7
Data 7
26
QP
Data Parity Out
27
/RAS
Row Address Strobe
28
/CASP
Something Parity ????
29
DP
Data Parity In
30
VCC
+5 VDC
