SD cards & NextZXOS

The ZX Spectrum Next boots NextZXOS from an SD card. Bizmuth uses an SD card image file (a .img) in place of a physical card.

Getting an image

Bizmuth hosts a ready-to-run NextZXOS SD image on the Downloads page — the quickest way to get going (it’s also what the first-run assistant downloads). Any standard FAT32 Next image works too, e.g. from specnext.com or zxnext.uk.

Attaching an image

• In the app: Media → SD Card → Attach… — the chosen path is saved to your config and restored next launch.
• On the command line: --sd path/to/card.img (also --sd0 / --sd1 for the two slots, and --sd-ro to open read-only — see the Command-line reference).

Booting NextZXOS

With an image attached, the Next boots straight into NextZXOS.

Running software

Use the NextZXOS browser to find and launch programs on the card — .nex games, demos and dot-commands. Navigate with the cursor keys and press Enter to run.