| Type | Title | Year | Publisher |
|---|---|---|---|
| Acorn BBC ROM | 🟩 PHX Ver. 1 | 198? | University of Cambridge |
| Acorn BBC ROM | 🟩 PHX Ver. 2 | 198? | University of Cambridge |
| Acorn BBC ROM | 🟩 PHX Ver.0.23 | 198? | University of Cambridge |
| Acorn BBC ROM | 🟩 SSMP Ver. 2.00 | 1987 | University of Cambridge |