#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
+
+# Optional serial mouse driver features
+# Support scrolling while holding the middle mouse button
+# (currently only supported for Mousesystems mice):
+#OPT_DEFS += -DSERIAL_MOUSE_CENTER_SCROLL
# Optimize size but this may cause error "relocation truncated to fit"
#EXTRALDFLAGS = -Wl,--relax