Specifying Variable Addresses in C
The user can tell the compiler to specify the address of a variable in a C file using the :
operator. The constant value following the : operator is the word address of the global
variable (i.e., int OneReg : 0xBCD ; specifies that the global variable OneReg
resides at word address 0xBCD).
NOTE
The Linker does not reserve space for global variables declared with the :operator.