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# city42
*A pre-built, low profile, unibody split keyboard based on the RP2040 processor*
* Keyboard Maintainer: [Kevin Gee](https://github.com/controller-works)
* Hardware Supported: *city42 split unibody ergonomic keyboard*
* Hardware Availability: *[Controller Works Retail Site](https://controller.works/products/city42-ergonomic-keyboard)* Hardware is available as pre-built units only.
Make example for this keyboard (after setting up your build environment):
```sh
make controllerworks/city42:default
```
Flashing example for this keyboard:
```sh
make controllerworks/city42:default:flash
```
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
## Features
- Highly integrated design with microcontroller and USB connectors on the main board
- RP2040 processor by Raspberry Pi Foundation running at 130 MHz with 16MB flash memory
- 40mm Cirque trackpad
- 42 per-key RGB LEDs
- ESD and over-current protection on USB
- Reset and boot tactile switches
- USB C host connection
- Hot swap connectors for Kailh Chocolate PG1350 switches
- Chocolate key spacing (18mm horizontal x 17mm vertical)
## Bootloader
Enter the bootloader in 3 ways:
* **Bootmagic reset**: Hold down the upper left key while plugging in USB
* **Physical reset button**: Press the RST button twice, rapidly
* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available
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