Strangely, the Emplant only took Mac ROMs in order to dump them to a file. They're not usable directly with the emulation.
There's a lot of neat imcomplete features on the Emplant. With RAM chips in those sockets and a working battery, it could function as an SRAM card to load in data very early in the boot process, much like today's Flash cards. It also has some provision for Audio mixing/recording (can't remember exactly what).
Of course, in typical Jim Drew fashion, software for these features never appeared.
