HP Forums

I have heard that the HP Prime firmware is largely just a typical ELF binary. If I flash Linux OS to the NAND (as per these instructions), then will I still be able to run the original firmware on that calculator?

Being an ELF binary really does not say much at all about the nature of a binary... unless that ELF binary already runs under Linux (in which case the actual OS would be around it), that won't work.

Consider for example that both the Linux kernel and a program running under Linux are both ELF binaries.