Before anyone says "OMG WTF 3DS EMULATOR?!" they are talking about a program that emulates the ARM CPUs used in the 3DS, like QEMU. It is just good enough to test the Gateway code, but does not emulate a 3DS.
i might be misreading, but i think they're talking about a program that emulates the virtual machine sorta thing the gateway uses. the obfuscation they employ throughout is.. really something.







