For fun I’m currently looking at some long standing Super Nes video plagues in MESS:

Fixed a flag bug with blending effects:

Added basic support for horizontal mosaic effects for all games in the driver:

Fixed a 16×16 tile switch bug in 2bpp mode:

EDIT1 (3-ago-2009):

Fixed Super Kick Boxing sound and booting, caused by an undefined register read (graphics are still quite off, HDMA?):

Shien The Blade Chaser / Shien’s Revenge instead tests a register that in theory must be 0xff (the NMITIEN), still investigating…

EDIT2: (4-ago-2009): Fixed mode 5/6 tilemap drawings cutted in half bug, there are still issues caused by something else…

(will update the post as long that I’ll get & fix new ideas)