File Formats

The NextZXOS can read and load these kind of files: bas, tap, nex, z80, sna, snx, dot, o, p

• .z80, .sna and .snx are Spectrum snapshots, more suitable as emulator compatibility than a real format
• .o is a ZX80 snapshot
• .p is a ZX81 snapshot
• .nex is good for a program that takes over the machine
• .dot is good for dot commands and programs that can coexist with BASIC/NextZXOS and can return to BASIC safely (i.e. counterpart to nex)
• .tap is a simple container format that can hold many files, is compatible with emulators and supported by many tools.
• .bas is the native SD-card format for BASIC programs (first 128 bytes of the file form standard +3DOS header).
• .scr is used for a standard Spectrum screenshot created with SAVE "picture.scr" SCREEN$ (256x192, 15 colours per character cell).
• .shc is used for a screenshot in Timex 8x1 Hi-colour mode (256x192, 15 colors).
• .shr is used for a screenshot in Timex Hi-res mode (512x192, mono).
• .slr is used for a lo-res screenshot (128x96, 256 colours).
• .sl2 is used for a Layer 2 screenshot (256x192, 256 colour).
• .pal is a 9-bit palette format (256 pairs of bytes in %RRRGGGBB, %P000000B format). Files can be loaded and saved from the Screenshots menu in NextZXOS after pressing the M1 button or F9. The P bit sets priority when used in layer 2 palettes. Palette entries with P=1 cause their pixels to appear above everything else, regardless of globally-set layer priorities.
• .npl is a 9-bit palette format. It The first 512 bytes are identical to a .pal file. The 513th byte designates transparency - for sprite palettes, the transparency byte is a real index, and for other palettes it is a colour mask. .npl files can be created, saved and loaded by WASPtools.