It took me a while, but I finally allocated some time to allow creating a video to demonstrate the usage of our TL866 EPROM Programmer Adapter for 27C400/800/160 and 27C322 16bit EPROMS.
If you’d like one of these Adapters, you’ll find a Kitset or a Fully Assembled & Tested option, on Tindie: https://www.tindie.com/stores/DigicoolThings/
The Fully Assembled & Tested Adapter is also available on eBay (Tindie is preferred): https://www.ebay.com/itm/284550002479
The video includes a brief introduction, followed by backing-up a 8Mibit FLASH ROM from a Sega game cartridge. Finally, writing a 27C322, the largest 32Mibit MASK ROM pin-out compatible 42 pin EPROM.
Check it out here: https://youtu.be/eNMyqg3L_nE