What is the code to load a value that is on sfr_data_in into the 8051 (i.e. some register at a specific address of the 8051)? I imagine it uses some combination of sfr_rd, but that is an output signal. So what is the actual C command? Thanks.
http://www.keil.com/support/man/docs/c51/c51_le_sfrmem.htm