Shortcuts

Ctrl+Enter assemble, F5 run snapshot, Shift+F5 run tape, F6 refresh disassembly.

Debugger tab: F5 continue, Shift+F5 break, F9 toggle breakpoint, Ctrl+F10 run to cursor, F10/F11/Shift+F11 step over/into/out.

Entry point

Use .ENT label when you want the generated snapshot to start directly at your program entry point.

Disassembly

The Disassembly tab uses the uploaded z80cpu.js decoder against one captured emulator snapshot. Enter an address, click Refresh, and the listing is generated from that one frozen memory image.

Generated files

Run SNA builds a Spectrum snapshot and loads it immediately. Run TAP builds a tape image and hands it to the emulator’s normal file-loading path.