Memory slots and cards connectors pinouts
40-pin SIMM module (used on Acer 486 Notebooks)

 

Pin
Number
Pin
Name
Description
1 GND  
2 CAS1  
3 D3  
4 D2  
5 D1  
6 D0  
7 CAS0  
8 CAS1  
9 D7  
10 D6  
11 D5  
12 D4  
13 +5V  
14 A10  
15 A9  
16 A8  
17 A7  
18 A6  
19 RAS  
20 WE  
---- ------ --------------
21 RAS  
22 A5  
23 A4  
24 A3  
25 A2  
26 A1  
27 A0  
28 +5V  
29 D11  
30 D10  
31 D9  
32 D8  
33 CAS2  
34 CAS3  
35 D15  
36 D14  
37 D13  
38 D12  
39 CAS2  
40 GND  

 


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