-static uint16_t ao_usb_in_bytes;
-static uint16_t ao_usb_out_bytes;
-static __data uint8_t ao_usb_iif;
-static __data uint8_t ao_usb_oif;
+static __xdata uint16_t ao_usb_in_bytes;
+static __xdata uint16_t ao_usb_out_bytes;
+static __xdata uint8_t ao_usb_iif;
+static __xdata uint8_t ao_usb_oif;