Cx51 User's Guide

FCVAR

The FCVAR macro accesses absolute memory addresses in the const far memory area (the HCONST memory class). You may use this macro in your programs as follows:

#include <absacc.h>    /* Include Macro Definitions */
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var = FCVAR (int, 0x24002)        /* read int from HCONST address 0x24002 */
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Note

• Objects accessed using this macro may not cross a 64KB segment boundary. For example, you cannot access a long variable at address 0xFFFE.