Add KB09-01 keyboard (#24044)

Co-authored-by: jack <jack@pngu.org>

1 files changed, 26 insertions, 0 deletions

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+# doio/kb09
+
+![kb09-01](https://i.imgur.com/MVKeweC.png)
+
+QMK for DOIO GBA keypad .
+
+* Keyboard Maintainer: DOIO2022
+* Hardware Supported: DOIO GBA keypad
+
+Make example for this keyboard (after setting up your build environment):
+
+    make doio/kb09:default
+
+Flashing example for this keyboard:
+
+    make doio/kb09: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).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available