< Assembler Command Options / Microcontroller Options >
The default for this option is determined based on the environment variable ISA_RX.
This option is used to select an instruction-set architecture (RXv1 or RXv2) for use in generating instruction codes. |
When -isa=rxv1 is specified, an instruction code for the RXv1 instruction-set architecture is generated. |
When -isa=rxv2 is specified, an instruction code for the RXv2 instruction-set architecture is generated. |
When neither the -nofpu nor -fpu option has been selected, specifying the -isa option automatically selects the |
Omitting the -isa option will lead to an error if neither the -cpu option nor one of the environment variables (CPU_RX or ISA_RX) is specified. |