How to build different bootrom bin
Build BootROM for FPGA Verification
Enable FPGA and run "./b1.sh fpga [deploy dir]" to build FPGA version.
Build BootROM for MPW1
Disable FPGA and run "./b1.sh mpw1 [deploy dir]" to build MPW1 version.
Build BootROM for MPW2
Disable FPGA and run "./b1.sh mpw2 [deploy dir]" to build MPW2 version.
If you want to enable buf dump, you can enable DUMP_BUF and disable LEGACY_BOOT options.