Hi FvM,
I did assign unsigned char xdata Data1[500]; can compiler without error. However, once I burn in the Hex file to my MCU, all the data became a constant value which make no changes. I suspect the compiler may have assign this buffer memory to some other places thats which the output is not what I expected
Therefore, I would like to know whether we must set anything in Keil uVision C compiler to use the SRAM of my DS89C450 MCU. I still believe its a setting issue because I debug it using the uVision debugger and my code works fine in the debugging mode