XBYTE

The XBYTE macro accesses individual bytes in the external data memory of the 8051. You may use this macro in your programs as follows:

#include <absacc.h>    /* Include Macro Definitions */
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rval = XBYTE [0x0002];
XBYTE [0x0002] = 57;
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This example reads and writes the contents of the byte in external data memory at address 0002h.

The range of valid index values for this macro is 0-65535.