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Shift the right half's top two rows: 6 and F6 lead the right hand

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Resolves the ragged outer edge on both halves at once. Left drops to 34 keys
in six columns each five deep, with no orphans. Right goes to 41: six full
columns, then F12/=/]/Enter, then Bksp and backslash sharing the outer pinky
column instead of backslash sitting alone two columns out.

Co-Authored-By: Claude Opus 5 <[email protected]>
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William RickertandClaude Opus 5 committed 2026-08-27 15:09:21 -05:00
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commit 5e527bb7b9
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README.md
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@@ -11,8 +11,8 @@ Status: **design**. No boards ordered, no firmware written.
| Board | Qty | Keys | Carries |
|---|---|---|---|
| `hardware/half-left` | 1 | **36** | MCU, matrix, USB-C, SBU split link |
| `hardware/half-right` | 1 | **39** | MCU, matrix, USB-C, SBU split link |
| `hardware/half-left` | 1 | **34** | MCU, matrix, USB-C, SBU split link |
| `hardware/half-right` | 1 | **41** | MCU, matrix, USB-C, SBU split link |
| `hardware/numpad` | 1 | 25 (16 numpad + 9 nav) | MCU, matrix, 1 encoder, **CH334R hub**, 3 downstream ports |
**Numpad layout is settled** — see `docs/numpad-layout.svg`, and
@@ -148,7 +148,7 @@ for footprints — don't draw them.
### The halves are two different boards
Splitting a full 104 at the 6/T/G/B boundary gives **36 keys left, 39 right** —
Splitting a full 104 gives **34 keys left, 41 right** (after moving `6`/`F6` right) —
the right side inherits Backspace, Enter, both brackets, the backslash and an
extra bottom-row key. They are therefore *not* mirrors, and the earlier plan of
one layout flipped for both halves does not survive.
@@ -199,27 +199,25 @@ board is used less.
`docs/half-right-staggered.svg`.
### The ragged outer edge — an open decision
### The outer edge — resolved
Splitting a row-staggered 104 leaves keys that have no column to belong to,
because the number row and the alpha rows are cut half a unit apart.
Splitting a row-staggered 104 leaves keys with no column to belong to: the
number row and the alpha rows are cut half a unit apart, so `6` sits between `T`
and `Y` with no alpha beneath it.
- **Left half:** `6` and `F6` end up alone in a 2-key column. `6` sits at x=6.0,
`T` at x=5.5, `Y` at x=6.5 — so `6` is *between* T and Y, and falls left of
the cut with no alpha beneath it.
- **Right half:** worse. Six clean columns, then an outer pinky column holding
Bksp / `]` / Enter, and **`\` alone in an eighth column**.
**Resolved by shifting the right half's top two rows over one column**, so `6`
leads the number row and `F6` leads the function row, both sitting above `Y`.
Three ways to resolve it, undecided:
- **Left: 34 keys, six columns, every one five deep.** No orphans at all.
- **Right: 41 keys.** Six full columns, then `F12`/`=`/`]`/`Enter`, then `Bksp`
and `\` sharing the outer pinky column.
1. **Keep it.** Authentic to touch-typing — `6` really is a left-index stretch.
2. **Move `6`/`F6` right**, aligned above `Y`. Left becomes a clean 6 columns at
34 keys, right goes to 41.
3. **Duplicate `6` on both halves.** What the ErgoDox does. Costs one key, ends
the argument.
`\` no longer sits alone two columns out — it pairs with Backspace, and both
are genuine outer-pinky reaches. `docs/half-left-staggered.svg`,
`docs/half-right-staggered.svg`.
`\` has no equivalent escape — it either gets its own outer column, moves onto
a layer, or takes a thumb slot.
Still open: the right thumb is carrying **five** keys (Space / Alt / Win / Menu
/ Ctrl) and one thumb will not cover five. Menu is the obvious deletion.
### Tenting