NullDC is a Sega Dreamcast video game emulator for Microsoft Windows. In addition, NullDC is a NAOMI arcade emulator. Gamers can play the Sega Dreamcast and their backup Dreamcast games on their PC with this program. An ISO is a disc image for use on computers. You can create an ISO image out of a video game, CD or DVD disc. NullDC has the ability to load the GDI format used for the Dreamcast, and can load ISOs.
Go to "Options" and then "Select Plugins." Select "Image Reader Plugin" as your plugin and then click "OK."
Click "File" and then "Normal Boot." An "Open" window appears to allow you to search for the ISO file you want to load on NullDC. Click the "Open" button once you find the ISO game file.
Click "System" and then click "Start" to load ISO on NullDC. Wait for the NullDC emulator to boot. The ISO game should play in a few seconds.