I put up a port of a well-known BASIC game up on itch, adapting it to a text adventure interface.
https://jim-plus.itch.io/hammurabi
I also posted BASIC source code to a US Civil War game on Github, changing the default and only choice of side from Confederacy to Union. It was a lot easier to win as Union.
https://github.com/jim-plus/basic_civil_war_union
Lost interest in porting the engine for Temple of Apshai after getting map display, navigation, and travel working. While it was fun reverse-engineering the file format of the various dungeon levels for the BASIC game engine, the game is still being sold today on Steam (as a slightly bugged PC port), so it's neither abandonware nor free to extend from.
https://jim-plus.itch.io/hammurabi
I also posted BASIC source code to a US Civil War game on Github, changing the default and only choice of side from Confederacy to Union. It was a lot easier to win as Union.
https://github.com/jim-plus/basic_civil_war_union
Lost interest in porting the engine for Temple of Apshai after getting map display, navigation, and travel working. While it was fun reverse-engineering the file format of the various dungeon levels for the BASIC game engine, the game is still being sold today on Steam (as a slightly bugged PC port), so it's neither abandonware nor free to extend from.