Linux kernel driver for programmable split keyboard based on two Koolertron 48-key keyboards.
- Vendor ID: 0x04b4 (Cypress)
- Product ID: 0x0818
- Keys per half: 48
The driver remaps the OEM keys to provide the following layouts:
| ESC | Delete | F1 | F2 | F3 | F4 | F5 | |
| CAS-F5 | CAS-F6 | ` | 1 | 2 | 3 | 4 | 5 |
| CAS-F7 | CAS-F8 | Tab | Q | W | E | R | T |
| CapsLock | CAS-F9 | \ | A | S | D | F | G |
| CAS-F10 | CAS-F11 | LShift | Z | X | C | V | B |
| Rec/Stop | CAS-F12 | LCtrl | LMeta | Cmp | LAlt | Spc | Spc |
| F6 | F7 | F8 | F9 | F10 | F11 | F12 | Insert |
| 6 | 7 | 8 | 9 | 0 | - | = | BS |
| Y | U | I | O | P | [ | ] | PgUp |
| H | J | K | L | ; | ' | Enter | PgDn |
| N | M | , | . | / | Home | ↑ | End |
| Spc | RAlt | Cmp | RCtrl | RShift | ← | ↓ | → |
- CAS = Ctrl+Alt+Shift+
- Rec/Stop
- Press: sends RECORD key
- Release: sends STOP key
- Record: Used for PTT press event
- Stop: Used for PTT release event
- Compose: Available on both halves
- The driver automatically detects left/right keyboard based on USB device path
- Each half maintains its own keymap
- All 48 keys per half are fully programmable through the keymap arrays
Koolertron Single-Handed Programmable Mechanical Keyboard
The Koolertron keyboard sends the following keys (based on USB HID codes):
| A | B | C | D | E | F | G | ScrLock |
| H | I | J | K | NumLk | KP/ | KP* | KP- |
| L | M | N | O | KP7 | KP8 | KP9 | KP+ |
| P | Q | R | S | KP4 | KP5 | KP6 | KPEnt |
| T | U | V | W | KP1 | KP2 | KP3 | KP0 |
| X | Y | Z | KP. | Left | Right | Up | Down |
These keys are remapped by the driver to create the custom split keyboard.