I've taken an old space invaders emulator written in C, converted it to a Visual C++ Express project and recompiled it. Rather easy.
When I started it up, I didn't have any sound and then I remembered that SI uses samples. So I went to a site and downloaded a set and plugged them in to get sound working.
This set appeared to be imcomplete so I went back to the mame site and downloaded their copy. Why does it appear that 4,5,6 and 7 are the exact same thing as 14,15,16 and 17?