Release notes and development updates for the TwistedRaven Z80 tools — FantASM, Zinc and Bizmuth.

FantASM 2.1.0 is available

September 18, 2026FantASM

FantASM 2.1.0 is available to download. !virtual places code at an address it does not yet occupy, ALIGN pads to a boundary, and an expression takes every comparison !assert already spelt. Underneath, the whole diagnostic register — messages, hints, the -v/-vv log — is reworded to one house style.

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0x1DE 0.5.0 is available

September 17, 20260x1DE

0x1DE 0.5.0 is available — the VS Code and VSCodium extension for the Spectrum-family languages. Highlighting is now generated from a language surface: one file per language enumerating its words, literals, comments and blocks, so a word added in one place reaches every editor at once.

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FantASM 2.0.0 is available

September 4, 2026FantASM

FantASM 2.0.0 is available to download. The editor now answers with what the build answers. Libraries get a real interface, tests get spans and checksums, and 59 new diagnostic codes say what is wrong rather than sharing one number between five faults.

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FantASM 1.9.0 is available

August 22, 2026FantASM

FantASM 1.9.0 is available to download. One project file can now build several images, the language server finally knows what machine you’re targeting, and there are four breaking changes — read those first.

The documentation has been rewritten alongside it.

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Introducing hg80

August 18, 2026hg80

hg80 (“Mercury”) is the CPU at the bottom of the toolchain — a Z80 and Z80N core, stepped one clock edge at a time. It’s the processor Bizmuth runs on, and as of 1.0.0 it’s a public Rust crate on crates.io.

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