-PS2_USE_USART = yes # uses hardware USART engine for PS/2 signal receive(recomened)
-#PS2_USE_INT = yes # uses external interrupt for falling edge of PS/2 clock pin
-#PS2_USE_BUSYWAIT = yes # uses primitive reference code
-
-# Serial Mouse Options
-# You can choose a mouse protocol and the implementation of
-# the underlying serial connection.
-#
-#SERIAL_MOUSE_MICROSOFT_ENABLE = yes # Enable support for Microsoft-compatible mice
-#SERIAL_MOUSE_MOUSESYSTEMS_ENABLE = yes # Enable support for Mousesystems-compatible mice
-#SERIAL_MOUSE_USE_UART = yes # use hardware UART for serial connection
-#SERIAL_MOUSE_USE_SOFT = yes # use software serial implementation
+#PS2_USE_USART ?= yes # uses hardware USART engine for PS/2 signal receive(recomened)
+PS2_USE_INT ?= yes # uses external interrupt for falling edge of PS/2 clock pin
+#PS2_USE_BUSYWAIT ?= yes # uses primitive reference code