v0.4.0 — Alphabet-first keymap with Ctrl shortcuts, JIS support, and context menu

v0.4.0 — Alphabet-first keymap with Ctrl shortcuts, JIS support, and context menu

---

Streamlined keymap focused on English alphabet input. Removed Japanese kana chords and reorganized the layout for fewer key presses per character.

What's changed from v0.3.0

• Removed Japanese kana input — all hiragana chords (あ行–わ行, ん, dakuten/handakuten/komoji) removed
• Alphabet a–z moved to 2–3 key chords (was 5–8 keys in v0.3.0) — significantly easier to type
• Numbers 0–9 moved to 0x91–0x9A — no more single-key chords that can't be ZMK combos
• Ctrl+A through Ctrl+Z — full modifier shortcuts (select all, copy, paste, undo, save, etc.)
• Context menu key (0x0D) — equivalent to mouse right-click
• JIS keyboard layout support — gen_keymap.py --layout jis generates correct keycodes for Japanese host PCs
• IME toggle — layout-aware (US: Alt+`, JIS: 半角/全角 key)
• Default layer set to &none — prevents accidental single-key output
• F11/F12 moved to 0x9B/0x9C, arrow keys simplified (no more Shift layer)
• Bluetooth 5-host switching retained from v0.3.0

Keymap stats

• ~180 macros across ~200 combos (layers 0–7)
• All chords are 2+ keys (no single-key combo SKIPs)
• Max combos per key: 101 (CONFIG limit: 160)

Assets

File	Description
peaky8bit_left-*.uf2	Firmware for left hand (central) — US layout
peaky8bit_right-*.uf2	Firmware for right hand (peripheral) — US layout
settings_reset-*.uf2	Bond/settings reset (use if pairing issues occur)
keymap_v04.csv	Machine-readable keymap data
gen_keymap.py	Keymap generator script (supports --layout us|jis)
peaky8bit.keymap	Generated ZMK keymap source (US layout)

---

アルファベット入力に特化したキーマップへ刷新。かな入力を削除し、a–zを2–3キーchordに移動。Ctrl+ショートカット全26文字、コンテキストメニューキー、JIS配列サポートを追加。

v0.3.0 — Full Japanese + Alphabet keymap with BT multi-host

First feature-complete release of Peaky 8-bit firmware.

What's included

• Full Japanese input via romaji chords (46 kana + dakuten/handakuten/komoji)
• 26-key English alphabet layer (with Shift for uppercase)
• Symbols, numbers 0–9, F1–F12, arrow keys
• Modifier arming system (Shift / Ctrl / Alt and combos)
• Bluetooth 5-host switching — chord to swap between paired devices
• BT_CLR chord for unpairing

Keymap stats

• ~230 actions across ~250 combos (layers 0–7)
• See docs/binary-chords-spec-v0_3.md for the full specification

Assets

File	Description
peaky8bit_left-*.uf2	Firmware for left hand (central)
peaky8bit_right-*.uf2	Firmware for right hand (peripheral)
settings_reset-*.uf2	Bond/settings reset (use if pairing issues occur)
keymap_v03.csv	Machine-readable keymap data
gen_keymap.py	Keymap generator script
peaky8bit.keymap	Generated ZMK keymap source

Flashing

1. Enter bootloader: double-tap RST on the XIAO BLE
2. Drag & drop the matching .uf2 file
3. Left first, then right

• Ignore error message, click [x] button on the window when it appeared.

BT multi-host usage

Chord	Action
0xC1 (L1+L2+R4)	Select profile 0
0xC2 (L1+L2+R3)	Select profile 1
0xC3 (L1+L2+R3+R4)	Select profile 2
0xC4 (L1+L2+R2)	Select profile 3
0xC5 (L1+L2+R2+R4)	Select profile 4
0xC9 (L1+L2+R1+R4)	Clear current profile bond

---

初の機能完成版リリースです。日本語かな入力＋アルファベット＋BT 5ホスト切り替え対応。