| Type | Title | Year | Publisher |
|---|---|---|---|
| Sinclair ZX Spectrum cass. | 🟩 Assembler and Machine Code Debugger | 1984 | Roybot |
| Sinclair ZX Spectrum+3 disk | 🟩 Complete Machine Code Package | 1987 | Roybot |
| Sinclair ZX Spectrum cass. | 🟩 Complete Machine Code Package | 1987 | Roybot |
| Sinclair ZX Spectrum cass. | 🟩 Speccifax | 1988 | Roybot |