diff --git a/config.mk b/config.mk
index 2944820..0e0b15e 100644
--- a/config.mk
+++ b/config.mk
@@ -3,4 +3,4 @@ ARTERY_CONTRIB = $(BOARD_DIR)/OS
 USE_LIS302 = no
 USE_FATFS = no
 
-LDSCRIPT = $(ARTERY_CONTRIB)/../ext/AT32F435_437_Firmware_Library/libraries/cmsis/cm4/device_support/startup/gcc/linker/AT32F435xG_FLASH.ld
\ No newline at end of file
+LDSCRIPT = $(STARTUPLD)/AT32F435ZMxx.ld
\ No newline at end of file
diff --git a/mpu_util.cpp b/mpu_util.cpp
index 4ea31c3..b591a43 100644
--- a/mpu_util.cpp
+++ b/mpu_util.cpp
@@ -7,6 +7,20 @@
 void baseMCUInit(void) {
 }
 
+bool ramReadProbe(volatile const char *read_address) {
+    return true;
+}
+
+bool isStm32F42x() {
+    return true;
+}
+
+void stm32_standby() {
+    // todo: does AT32 match stm32?
+}
+
+__attribute__((weak)) void boardInit() { }
+
 // copy-paste of stm32 method? reuse code?
 brain_pin_e parseBrainPin(const char *str) {
 	if (strEqual(str, "none"))