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diff --git a/keyboards/ducky/one2mini/1861st/rules.mk b/keyboards/ducky/one2mini/1861st/rules.mk
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+++ b/keyboards/ducky/one2mini/1861st/rules.mk
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+MCU_FAMILY = NUMICRO
+MCU_SERIES = NUC123
+
+# linker script to use
+MCU_LDSCRIPT = NUC123xD4xx0
+
+# startup code to use
+MCU_STARTUP = NUC123
+BOARD = NUC123SD4AN0
+
+# NUC123 series is Cortex M0
+MCU  = cortex-m0
+# ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+ARMV = 6
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+DIP_SWITCH_ENABLE = yes
+
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE