I've decided to publicly release (http://tailchao.com/Wataroo/index.php) the Watara SuperVision emulator I've had sitting around. Now you can learn about another 65c02 cousin to the PC-Engine, or just unpack it then throw the emulator in the trash (just like a real SuperVision).
(http://tailchao.com/Wataroo/g_watest.gif) (http://tailchao.com/Wataroo/index.php)
It also includes a little hardware test program to help fix broken units and confirm the weird behavior of the scrolling registers.
Only the STANDARD mapper is supported right now. I was hoping to get MAGNUM emulated, but I don't own that hardware variant nor a copy of "Journey to the West." The price on this garbage actually went up on eBay, and I'm not interested in paying it nor inviting more ancient hardware into my apartment.
Note that when loading ROMs the emulator will default to using the *.cdf extension which is inherited from another emulator I haven't released yet. Raw binaries are supported, just not the default option in the combo box. Of course, this is all in the help file.
Aside from the lack of TV-Link emulation this is probably the most accurate SuperVision emulator (as of writing). If you're going to huff paint thinner, you may as well do it correctly.
However, the port of Chimera B.I.T.S. did is actually quite well made.
Edit - Of course if anyone wants to donate SuperVision hardware to emulate that is totally cool.