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Programming the Commodore 64
with .NET

Build, assemble, run and debug C64 programs
without leaving your IDE...
Retro development, reimagined through modern tooling!

Get Started > Examples > > Watch .NET Conf 2025 Demo
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 Zero Friction Dev Loop

Emit PRG/D64 and auto-launch live coding into VICE straight from
.NET.

Introduction >
[?] Fluent Assembler

With Asm6502 Labels, sections, data blocks, helpers, and source
mapping back to C#.

Assembler >
 Sprite Tooling

Draw in Skia and convert to C64 sprite bytes automatically.

Sprites >
 SID Tooling

Loader, relocator, and player (target address and ZP ranges).

Music >
 Core Helpers

Ideal for quick demos and prototyping and Core helpers - C64Assembler
with Zero-Page allocator, raster IRQ setup, Sprites classes, PRG and
D64 images files...

Helpers >
 Debugging

With VS Code, inspect registers, memory, VIC/SID registers,
breakpoints, execution control (step-in- step-over...), view
disassembly...

Debugging >

 RetroC64 .NET Conf 2025 Demo

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