cc65/cc65
cc65 - a freeware C compiler for 6502 based systems observed · 2026-08-28
Health v2 · maintenance only
67/100
- Activity 98
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4913
- days_rel: n/a
- days_push: 13
- n_releases_24m: 0
Adoption not part of the score
2687 stars · 505 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
cc65 is a complete cross-development suite for 65(C)02-based systems, including a C compiler, macro assembler, linker, archiver, and simulator. It provides C runtime library support for many classic 8-bit machines such as the Commodore 64, Apple II, Atari 8-bit computers, and the NES.
Use cases
- compile C programs for the Commodore 64
- write NES games in C
- cross-compile for Apple II
- develop Atari 2600 homebrew software
- assemble 6502 assembly code
- build software for retro 8-bit computers
- target the Commander X16 with C
When to choose
- you need a C compiler targeting 6502-based retro hardware
- you want a full toolchain (assembler, linker, archiver) for 8-bit development
- you need runtime library support for classic machines like C64, Apple II, or NES
When to avoid
- you target modern CPUs like x86 or ARM
- you need a hosted compiler running on 6502 hardware itself
- you require modern C standards compliance beyond what a small 8-bit compiler offers
Facets
cli-tool · maturity active
compiler interpreter developer-tools compilers embedded-systems windows cli cross-platform 6502 c-compiler cross-compiler retrocomputing assembler linker commodore atari nes 8-bit retro-computing game-development linux macos
2 sources
- readme: https://github.com/cc65/cc65 · fetched 2026-08-28 · b9fea13cd80a
- homepage: https://cc65.github.io · fetched 2026-08-29 · c85b49461dbb
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| cc65/cc65 | main | 67 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem