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hello all, i dont know how to access DPTR and regisrers using C programming. kindly help me in this .
As your cross-post says that you've only just downloaded the Raisonance tools, and judging by the nature of the question, can we assume that you are new to 'C' on the 8051? If so, for the Keil tools, the first thing to do is to read the uVision Getting Started Guide, and work throught the example projects in it. You will also need to read the C51 Manual, to find learn about the language extensions that Keil have added to cope with the 8051-specifics (like SFRs, bit-addressable objects, XDATA, etc). These will give you a proper introduction to the tools and how to use them, and save you having to ask elementary questions here. No Doubt Raisonance have similar documents.