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intel 386 marking & reference 
 
 
 
   
  
   
    | On CPU top | 
    intel 
      i386
  A80386DX-25 IV XX218 LI155181 INTEL ®© '85 | 
    intel 
      i386
  A80386DX-25IV SX218 LI155181 INTEL ®© '85 | 
   
   
   
  
    
      | intel 386 Processor Part Mark | 
     
   
    | 80386DX | 
    80386SX= 386 w/o FPU 80386DX= 386 w/ FPU | 
   
  
    | A | 
    A= 132pin PGA (Pin Grid Array) | 
   
  
    | SX218 - S-spec | 
    S-spec | 
   
  
    | LI155181 | 
    serialization number | 
   
   
    | 25 - processor speed | 
    12-40MHz | 
   
   
   | 
 
 
SX218 386DX25 IV 
 
(275.000 transistors 386, QFP 100pin 387)
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