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???
08/25/05 10:12
Modified:
  08/25/05 10:13

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#100058 - no nonovolatile memory in 8052
Responding to: ???'s previous message
There is no nonvolatile memory inside the 8052 (is it with Basic or not). Upon reset, the internal variables are reset to their default values; baudrate is determined by autobauding (that's why you need to press the spacebar).
Let me ask a couple of questions: do you have EPROM attached? How much and at which addresses (8000h+ or also in the extensions area, 2000h+ and 4000h+)? Is there also the high voltage source and circuit needed for EPROM programming?

What happens if you write a line number and some command, say "10 PRINT 3"?

Jan Waclawek

PS: I hope you are not powering the board from the three AA cells any more...



List of 12 messages in thread
TopicAuthorDate
"Software" problem with 8052 basic            01/01/70 00:00      
   Bad RAM            01/01/70 00:00      
   HW?            01/01/70 00:00      
      Oops.            01/01/70 00:00      
         more detailed definition            01/01/70 00:00      
            no nonovolatile memory in 8052            01/01/70 00:00      
               hey jan            01/01/70 00:00      
                  Am I missing something ?            01/01/70 00:00      
                  circuit            01/01/70 00:00      
                     I do not know anythong about BASIC but w            01/01/70 00:00      
                        in fact, there is no EPROM...            01/01/70 00:00      
                           Burning circuit ?            01/01/70 00:00      

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