Rom address and rom location in 8051

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Rom and ram both memory are used in micro controller what is meaning of Rom address and ram location in assembly language both things are confuse me does anyone can explain how to use in programming
 

Rom where the user's code or program stored.

Ram contains the file regiters like sfr, r1, r2, etc which can be edited by user's program.

Ram is used frequently by arithmethic/logic unit. (i.e. without ram ALU can't perform complex or simple calculations)
 

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