Key features:
- Step-by-step execution by tact or full instruction
- Automatic execution with configurable speed
- Live register and RAM editing, including inline editing on the schematic
- Full state save/load in `.580`
- Legacy `.580` compatibility with the original emulator
- TXT/XLSX import by sheets and sections, plus memory block export
- External devices: monitor, floppy, HDD, network, printer
- Undo/Redo with 256 history entries
- UI localization: Russian and English
- Configurable default execution speed
- Opcode picker dropdown with search across all 244 documented instructions