zmk_mf68/app/tests/combo/combos-and-holdtaps-3/native_posix_64.keymap

#include <dt-bindings/zmk/keys.h>
#include <behaviors.dtsi>
#include <dt-bindings/zmk/kscan-mock.h>

&mt {
	flavor = "hold-preferred";
};

/ {
	combos {
		compatible = "zmk,combos";
		combo_one {
			timeout-ms = <40>;
			key-positions = <0 1>;
			bindings = <&kp X>;
		};
	};

	keymap {
		compatible = "zmk,keymap";
		label = "Default keymap";

		default_layer {
			bindings = <
			&kp A         &kp B
			&mt RSHFT RET &kp C
			>;
		};
	};
};

&kscan {
	events = <
	ZMK_MOCK_PRESS(1,0,10)
	ZMK_MOCK_PRESS(0,1,10)
	ZMK_MOCK_PRESS(1,1,10)
	ZMK_MOCK_RELEASE(0,1,50)
	ZMK_MOCK_RELEASE(1,1,50)
	>;
};