The sfr statement defines a special function register:
Where
sfr_symbol
is the name of the Special Function Register (SFR) symbol to
define.
address
is the address of the SFR.
The sfr statement allows you to define SFR data in a
consistent manner with the C251 compiler. With this statement you
may use a generic SFR register definition file for the C251
compiler and the A251 assembler.
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