+#define ao_arch_nop() _asm nop _endasm
+#define ao_arch_interrupt(n) __interrupt n
+
+#define ao_arch_naked_declare __naked
+#define ao_arch_naked_define __naked
+
+/* CC1111-specific drivers */
+
+/*
+ * ao_romconfig.c
+ */
+
+#define AO_ROMCONFIG_VERSION 2
+
+extern __code __at (0x00a0) uint16_t ao_romconfig_version;
+extern __code __at (0x00a2) uint16_t ao_romconfig_check;
+extern __code __at (0x00a4) uint16_t ao_serial_number;
+extern __code __at (0x00a6) uint32_t ao_radio_cal;
+
+#ifndef HAS_USB
+#error Please define HAS_USB
+#endif
+
+#if HAS_USB
+extern __code __at (0x00aa) uint8_t ao_usb_descriptors [];
+#endif
+
+/* Initialize stack */
+#define ao_arch_init_stack(task, start) { \
+ uint8_t __xdata *stack = task->stack; \
+ uint8_t t; \
+ *stack++ = ((uint16_t) start); /* 0 */ \
+ *stack++ = ((uint16_t) start) >> 8; /* 1 */ \
+ \
+ /* and the stuff saved by ao_switch */ \
+ *stack++ = 0; /* 2 acc */ \
+ *stack++ = 0x80; /* 3 IE */ \
+ \
+ /* 4 DPL \
+ * 5 DPH \
+ * 6 B \
+ * 7 R2 \
+ * 8 R3 \
+ * 9 R4 \
+ * 10 R5 \
+ * 11 R6 \
+ * 12 R7 \
+ * 13 R0 \
+ * 14 R1 \
+ * 15 PSW \
+ * 16 BP \
+ */ \
+ for (t = 0; t < 13; t++) \
+ *stack++ = 0; \
+ task->stack_count = 17; \
+ }
+
+
+
+/* Save current context */
+
+#define ao_arch_save_context() \
+ _asm \
+ /* Push ACC first, as when restoring the context it must be restored \
+ * last (it is used to set the IE register). */ \
+ push ACC \
+ /* Store the IE register then enable interrupts. */ \
+ push _IEN0 \
+ setb _EA \
+ push DPL \
+ push DPH \
+ push b \
+ push ar2 \
+ push ar3 \
+ push ar4 \
+ push ar5 \
+ push ar6 \
+ push ar7 \
+ push ar0 \
+ push ar1 \
+ push PSW \
+ _endasm; \
+ PSW = 0; \
+ _asm \
+ push _bp \
+ _endasm
+
+
+