https://github.com/cadaver/oldschoolengine2-emscripten

Limited feature C64 emulator, runs recent Covert Bitops games. C++ / Emscripten port.
https://github.com/cadaver/oldschoolengine2-emscripten

c64 cplusplus emscripten emulator

Last synced: 10 days ago
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Limited feature C64 emulator, runs recent Covert Bitops games. C++ / Emscripten port.

• Host: GitHub
• URL: https://github.com/cadaver/oldschoolengine2-emscripten
• Owner: cadaver
• Created: 2018-07-18T15:05:56.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2024-02-03T13:34:35.000Z (9 months ago)
• Last Synced: 2024-02-03T14:34:49.668Z (9 months ago)
• Topics: c64, cplusplus, emscripten, emulator
• Language: C++
• Size: 436 KB
• Stars: 5
• Watchers: 2
• Forks: 2
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
# OldschoolEngine 2 Emscripten port

Minimal line-based Commodore 64 emulator that emulates just enough to run the recent Covert Bitops C64 games (Hessian, Steel Ranger...) 

This is a C++ / Emscripten port that runs on web pages.

The original "oldschoolengine" ran on GameBoy Advance to run Metal Warrior 4, and it used a custom API for graphics, sound and file access. In contrast,

this project emulates a limited subset of an actual C64, so that the game can run unmodified.

Features:

- CPU emulation based on EMU6502 code by Yve Verstrepen

- Parts of SID emulation (noise, filter) based on jsSID by Mihaly Horvath

- Emscripten build system & OpenGL initialization based on tiny_chess by Jukka Jylänki

- Line-based VIC-II rendering

- Raster interrupt + partial CIA1 Timer A emulation

- Joystick port 2 control with arrows + ctrl as fire button

- Keyboard input

- D64 & D81 image support, loading / saving via minimal (and incorrect) Kernal routine traps

- Save file persistence

TODO:

- Full key mappings

Licensed under the MIT license, see the code for details. Use at own risk.

## Building

To build, the Emscripten compiler (emcc) and CMake are needed. Invoke CMake by specifying the generator and path to Emscripten's CMake toolchain.

`cmake . -G"Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=MyPathToEmscripten.cmake`