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???
04/18/07 15:08
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 		 #137435 - 8279?
Responding to: ???'s previous message

and it controls the display and manages the button inputs.


Seems to me like an 8279 from INTEL, compare the pinouts with this chip at:

http://www.csee.umbc.edu/~plusquel...6_IO3.html

John.



List of 31 messages in thread
TopicAuthorDate
Identify a chip.            01/01/70 00:00      
   why a chip            01/01/70 00:00      
      it's for a friend.            01/01/70 00:00      
         it's for a friend            01/01/70 00:00      
            defective programmed chip.            01/01/70 00:00      
   An 8051?            01/01/70 00:00      
      just an another 8051 with ROMed firmware?            01/01/70 00:00      
      corrections            01/01/70 00:00      
         "it would have to be way newer"            01/01/70 00:00      
            Legacy stuff ?            01/01/70 00:00      
               Philips (c) 1989 Intel (c) 1980            01/01/70 00:00      
         no clock?            01/01/70 00:00      
            I did some probing.            01/01/70 00:00      
               also EA is.            01/01/70 00:00      
            crazy.            01/01/70 00:00      
               One for X and one for Y?            01/01/70 00:00      
                  No...I don't think.            01/01/70 00:00      
                     You're referring to a milling machine, right?            01/01/70 00:00      
   8279?            01/01/70 00:00      
   Conclusion            01/01/70 00:00      
      how do you know that it is dead?            01/01/70 00:00      
         used a scope.            01/01/70 00:00      
            the standard checklist            01/01/70 00:00      
   suggestions            01/01/70 00:00      
      I made correction already.            01/01/70 00:00      
         careful now ...            01/01/70 00:00      
   Screw it            01/01/70 00:00      
      Better yet...            01/01/70 00:00      
         Hurco            01/01/70 00:00      
      Know that's Cool.            01/01/70 00:00      
      Looks like the old Bridgeport ...            01/01/70 00:00      

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