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hai all,
i am doing small programs for how do we accessing and manipulating external variable data from assembler file(A51 file). i have declared one external variable in another file like extern unsigned char data1 (in file.c) but i need to move the value to data1 variable from A51 file. please anyone helpme. thanks in advance.. regards, J.Raj
"i didnt understand (diffrence between data memory region)"
As Erik says, this is absolutely fundamental to doing anything on an 8051!
Especially in assembler!
In addition to the so-called "bible", here's a tutorial: www.8052.com/tutorial.phtml
And some books: http://www.keil.com/books/8051books.asp www.8052.com/books.phtml