Currently working on a flash cart for the SMS that supports a wide array of roms, proms, eproms, etc.
27C-, 28F-, 29F-, 29EE-, 49F-, etc.
16, 32, 64, 128, 256, 512, 010, 020, 040, and maybe more.
Problem is ... I don't own a Master System to test these out. I will not be printing any until I get one.