supported mappers:

MMC1
UNROM
AOROM
MMC2 - fair
Nina-1 

not supported:

MMC4
MMC3
GNROM

i don't know:

Crystal Dreams
100-in-1
Bandai
FFE F8xxx 
Namcot 106 
Jaleco SS8806 
Konami VRC4 
Konami VRC2 type A 
Konami VRC2 type B 
Irem G-101 
Taito TC0190 
Sunsoft "Mapper 4" 