Since both machines can run the same 6502 machine code, it would be neat if we could detect that we're not on the NES and use the Apple II ROM to print a warning message and exit
Acceptance criteria
[x] Booting the NOS disk in an Apple II prints a warning message and exits to the BASIC prompt
[x] Booting the NOS disk in an NES still works as normal
Description
Since both machines can run the same 6502 machine code, it would be neat if we could detect that we're not on the NES and use the Apple II ROM to print a warning message and exit
Acceptance criteria