TwistedRaven

Homebrew tools for retro development

TwistedRaven is one person building the retro-development tools I always wished I had — an assembler, a language and an emulator, made for the fun of it.

Bizmuth

v0.9.5-beta5
Run & debug

A cycle-accurate ZX Spectrum Next emulator with a source-level debugger, breakpoints and scripting.

The Bizmuth emulator →

FantASM

v1.7.5
Assemble

A cross-platform Z80 assembler — the complete Z80 and Z80N instruction set, macros, structs and Rhai scripting — with first-class ZX Spectrum Next support.

The FantASM assembler →

Zinc

In development
Write

A modern, Rust-flavoured language that compiles straight to Z80 — high-level ergonomics, no runtime overhead.

The Zinc language →

Other tools

0x1DE

Extension

The VS Code / VSCodium extension — FantASM language support and Bizmuth source-level debugging in your editor.

Get 0x1DE →

Rookery

macOS

A macOS menu-bar host for a Gitea act_runner — keeps a self-hosted CI runner connected.

About Rookery →

Latest news

All news →
Jul 28, 2026 Bizmuth
Bizmuth 0.9.5-beta5 is available

Bizmuth 0.9.5-beta5 is available to download.
Jul 28, 2026 Rookery
Rookery 1.0.1 is available

Rookery 1.0.1 is available to download.
Jul 23, 2026 Rookery
Rookery 1.0.0 is available

Rookery 1.0.0 is available to download — the first stable, notarized release of the macOS menu-bar host for a Gitea act_runner.

Early days yet — three tools so far, and more whenever the itch strikes.