The CornBit™ is not intended as a facility to transmit copyrighted content. Please do not purchase CornBit™ if you intend to use it in a way incompatible with copyright law. Please inquire if you need a specific configuration. I will not program them with content that violates copyright.
If you have the BackBit Chip Tester, the CornBit™ is fully reprogrammable with four 8KB ROMs of your choice. This is made possible by the extra pins that hang over on either side. The extra pins only take up a few millimeters of space, so they should not get in the way of other components. The included socket will made them even more likely to fit perfectly in your particular configuration.
Slot #1: C64 KERNAL ROM
Slot #2: C64 KERNAL (BackBit Enhanced)
Slot #3: C64 BASIC ROM
Slot #4: C64 Character ROM
To reprogram with the Chip Tester, append four 8KB binary files into a 32KB file. Then those 4 ROMs will be selectable with the 1st and 2nd DIP switches. Make sure to do a binary append. If you have a 4KB ROM, append it twice. If you have a 2KB ROM, append it 4 times. The 3rd DIP switch must be off during programming, and on during usage.