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Tennis (Amstrad 464/6128)

This game was created with the help of AI. If you don't enjoy AI-generated content, this game might not be for you! CPC Tennis is an unofficial fan port of Tennis, Nintendo's 1989 Game Boy game, for the Amstrad CPC 664. It's not a remake: the original Game Boy game code was translated instruction by instruction into Z80 assembly. Ball physics, player movement, the CPU opponent and the scoring rules all behave like the original. An automated test compared it with the real Game Boy game, step by step, over thousands of game updates: they matched exactly. The CPC's mode 1 has exactly four colours, just like the Game Boy's four shades of green. The whole Game Boy stadium is shown pixel for pixel, with no scrolling: the court, the crowd and Mario in the umpire's chair. Features The original gameplay, translated directly from the Game Boy code. 4 difficulty levels and a 1-set or 3-set match. 1 or 2 fire buttons, your choice in the menu: 1 button: the lob is automatic when your opponent comes to the net. 2 buttons: fire 1 hits, fire 2 lobs, just like the A and B buttons on the Game Boy. Flat shots, cross-court angles, deep drives, smashes and lobs. Full scoring: FAULT, LET, OUT, DEUCE and ADVANTAGE calls. AY sound effects: bounces, hits, the net and the crowd's applause. A 16-colour title screen in mode 0, with the original TENNIS logo. How to play Insert tennis.dsk in your emulator (Caprice32, WinAPE, ACE-DL…) or on a real CPC with a disk drive, then type: RUN"TENNIS" Made for the Amstrad CPC 664 (64K, disk). Made with AI This port was created with Claude, an AI model by Anthropic, working as a coding assistant. The developer directed the project, made the design and gameplay choices, and tested the game. The AI did the rest: it studied the original Game Boy code and wrote the tools that translate it into Z80 assembly; it wrote the Amstrad code, which covers the graphics, software sprites, sound, controls and menu; it built the automated tests that compare the result with the real Game Boy game. This is an experiment in AI-assisted retro development. The same approach also produced ZX Spectrum and Commodore 64 versions. Credits Original game: Tennis © 1989 Nintendo. Amstrad CPC port: fan project, made with the help of Claude (Anthropic). Tools: sjasmplus, Caprice32, PyBoy, SkoolKit. CPC Tennis is a non-commercial fan project. It is not affiliated with or endorsed by Nintendo or Amstrad. All trademarks belong to their respective owners.