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???
01/11/08 08:08
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#149298 - 10bits
Responding to: ???'s previous message
Andy Neil said:
IIRC, the 8086/8088 had an 8-bit IO address; so 255 ports maximum


... e.g. the "original" LPT port's I/O address base was 0x3BC.

JW


List of 12 messages in thread
TopicAuthorDate
PC Ports - Just curious            01/01/70 00:00      
   x86 has a separate IO space from memory space...            01/01/70 00:00      
   Misunderstanding?            01/01/70 00:00      
      10bits            01/01/70 00:00      
      16 bits            01/01/70 00:00      
         and more...            01/01/70 00:00      
            Memory mapped?            01/01/70 00:00      
               yes            01/01/70 00:00      
               cache...            01/01/70 00:00      
      IP Ports            01/01/70 00:00      
         Yes thats what I was looking for...            01/01/70 00:00      
            Nothing specifically to do with PCs, then!            01/01/70 00:00      

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