Here you have a super rare CDTV developer extended rom  programming board.

You only get these in a few select systems and they rarely come up for auction.

This allows you to upload different extended roms without removing chips, it's done via the floppy drive.

I can point you to where to get the software free.

100% working and tested

Retro kit, so no guarantees provided or implied.

No returns offered.

No guarantees.

LOOK at all the PHOTOs. They form part of the listing and show condition best.