SYSTEMS_C64.md

Highbyte.DotNet6502.Systems.Commodore64.C64

Overview

A partial implementation of a Commodore 64.

Current capabilities

• Run Commodore Basic 2.0 from ROM (user supplied Kernal, Basic, and Chargen ROM files).
• Limited VIC2 video chip support
  • Standard, extended and multi-color character modes
  • Standard and multi-color bitmap mode _(newer SkiaRenderer 2/2b in native & WASM, and OpenGL renderer in native only)
  • Sprites (hi-res & multi-color)
  • IRQ (raster, sprite collision)
  • Background and border color possible to per raster line
  • Fine scrolling per raster line (new newer SkiaRenderer 2b in native & WASM only)
• Limited CIA chip support
  • Keyboard
  • Joystick
  • Timers
  • IRQ
• Limited SID 6581 audio chip support
• WASM and native (SilkNet and SadConsole) app UI:s

C64 programs that works and how to run them

See SYSTEMS_C64_COMPATIBLE_PRG.md

C64 Basic AI code completion

See SYSTEMS_C64_AI_CODE_COMPLETION.md`

Implementations

• System logic Highbyte.DotNet6502.Systems.Commodore64

• Rendering

  • Highbyte.DotNet6502.Impl.SilkNet.Commodore64.Video
  • Highbyte.DotNet6502.Impl.Skia.Commodore64.Video
  • Highbyte.DotNet6502.Impl.SadConsole.Commodore64.Video

• Input

  • Highbyte.DotNet6502.Impl.SilkNet.Commodore64.Input
  • Highbyte.DotNet6502.Impl.AspNet.Commodore64.Input
  • Highbyte.DotNet6502.Impl.SadConsole.Commodore64.Input

• Audio

  • Highbyte.DotNet6502.Impl.NAudio.Commodore64.Audio
  • Highbyte.DotNet6502.Impl.AspNet.Commodore64.Audio

TODO

Monitor commands

Additional machine code monitor commands specific to the C64 system.

Commands:
  lb     C64 - Load a Commodore Basic 2.0 PRG file from file picker dialog.
  llb    C64 - Load a Commodore Basic 2.0 PRG file from host file system.
  sb     C64 - Save a Commodore Basic 2.0 PRG file to host file system.