Emulate the Sega SC-3000/SF-7000

Emulating the Sega SC-3000 (and, by extension, the unreleased SC-5000) with the SF-7000 FDC board will require not much extra programming, as most of the emulation for at least the sound (TI 3-voice PSG), CPU (Z80 processor) and others would already be, for the most part, written (obviously the Sega Mega Drive/Genesis shares some of these internals).