afiqzudinhadi/zmk-javelin-steno
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Add recommendations for 1MB flash boards

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afiqzudinhadi 2026-06-24 16:43:35 +08:00
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@ -17,6 +17,14 @@ Total flash usage (firmware + engine + dict) on a corne split (central half):
| Lapwing only | 2.08 MB | | Lapwing only | 2.08 MB |
| No dict (engine only) | 534 KB | | No dict (engine only) | 534 KB |
## Making It Work on 1MB Flash
If you want to use this on boards with limited flash (nice_nano_v2, etc.), some options:
- **Optimize dictionary format** — Javelin uses JSC4 hash maps (~2-3MB compiled). A trie/DAWG-based format could reduce this significantly.
- **Reduce dictionary size** — Trim to most common entries. ~120K entries fits ~458KB, ~100K entries fits ~384KB.
- **Add external QSPI flash** — Boards with external flash (W25Q128, etc.) can store the full dictionary. The engine already supports XIP reads via `XipPointer`.
## Setup ## Setup
Add to your `west.yml`: Add to your `west.yml`: