Tested games a bit yesterday - here are some findings:

Graphic Issues:
Ardy Lightfoot (cave roof graphics)
Blues Brothers (pre-title)
Bugs Bunny - Rabbit Rampage (beginning of first level)
Super F1 Circus (J) (title Screen)
Tom and Jerry (in-game - "Tom and Jerry The Movie" sign - there are supposed to be round knobs, but there are twin halfs showing instead)
Super Genjin 2 (J) - (menu text at title is black)
Secret of Evermore - (@ title screen, repeating graphics) .. (mode 7 after first battle - when ship is crashing)

Not Working (black screen/hang):
Rendering Ranger R2 (J)
Rival Turf
Rushing Beat (J) [!]