diff --git a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer
index 764bdadaa..e5f92d113 100755
Binary files a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer and b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer differ
diff --git a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
index d7f9e4f56..e7f914ca1 100644
--- a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
@@ -15,6 +15,7 @@
 #include "loadPattern.h"
 
 #include <netinet/in.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h> // usleep
@@ -93,6 +94,10 @@ void basictests() {
     LOG(logINFOBLUE, ("********* Chip Test Board Virtual Server *********\n"));
 #else
     LOG(logINFOBLUE, ("************* Chip Test Board Server *************\n"));
+    initError = enableBlackfinAMCExternalAccessExtension(initErrorMessage);
+    if (initError == FAIL) {
+        return;
+    }
     initError = defineGPIOpins(initErrorMessage);
     if (initError == FAIL) {
         return;
@@ -438,6 +443,32 @@ uint32_t getDetectorIP() {
     return res;
 }
 
+int enableBlackfinAMCExternalAccessExtension(char *mess) {
+    unsigned int value;
+    const char *file_path = BFIN_AMC_ACCESS_EXTENSION_FNAME;
+    FILE *file = fopen(file_path, "r");
+    if (!file) {
+        strcpy(mess, "Failed to enable blackfin AMC access extension. Could "
+                     "not read EBIU_AMBCTL1\n");
+        LOG(logERROR, (mess));
+        return FAIL;
+    }
+    fscanf(file, "%x", &value);
+    fclose(file);
+
+    value |= BFIN_AMC_ACCESS_EXTENSION_ENA_VAL;
+    file = fopen(file_path, "w");
+    if (!file) {
+        strcpy(mess, "Failed to enable blackfin AMC access extension. Could "
+                     "not write EBIU_AMBCTL1\n");
+        LOG(logERROR, (mess));
+        return FAIL;
+    }
+    fprintf(file, "0x%x", value);
+    fclose(file);
+    return OK;
+}
+
 /* initialization */
 
 void initControlServer() {
diff --git a/slsDetectorServers/slsDetectorServer/include/blackfin.h b/slsDetectorServers/slsDetectorServer/include/blackfin.h
index fef76ad48..672f58c57 100644
--- a/slsDetectorServers/slsDetectorServer/include/blackfin.h
+++ b/slsDetectorServers/slsDetectorServer/include/blackfin.h
@@ -5,6 +5,23 @@
 #include <inttypes.h>
 #include <sys/types.h>
 
+/** enable support for ARDY signal on interface to FPGA
+ * needed to properly translate avalon_mm_waitrequest in the CTB firmware
+ * https://www.analog.com/media/en/dsp-documentation/processor-manuals/bf537_hwr_Rev3.2.pdf
+ * page 274
+ * */
+#define BFIN_EBIU_AMBCTL1_B2_ARDY_ENA_OFST (0)
+#define BFIN_EBIU_AMBCTL1_B2_ARDY_ENA_MSK                                      \
+    (1 << BFIN_EBIU_AMBCTL1_B2_ARDY_ENA_OFST)
+#define BFIN_EBIU_AMBCTL1_B2_ARDY_POL_OFST (1)
+#define BFIN_EBIU_AMBCTL1_B2_ARDY_POL_MSK                                      \
+    (1 << BFIN_EBIU_AMBCTL1_B2_ARDY_POL_OFST)
+
+#define BFIN_AMC_ACCESS_EXTENSION_ENA_VAL                                      \
+    (BFIN_EBIU_AMBCTL1_B2_ARDY_ENA_MSK | BFIN_EBIU_AMBCTL1_B2_ARDY_POL_MSK)
+#define BFIN_AMC_ACCESS_EXTENSION_FNAME                                        \
+    "/sys/kernel/debug/blackfin/ebiu_amc/EBIU_AMBCTL1"
+
 /** I2C defines */
 #define I2C_CLOCK_MHZ (131.25)
 
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
index f572252bd..8570456f3 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
@@ -113,6 +113,10 @@ void setModuleId(int modid);
 u_int64_t getDetectorMAC();
 u_int32_t getDetectorIP();
 
+#if defined(CHIPTESTBOARDD)
+int enableBlackfinAMCExternalAccessExtension(char *mess);
+#endif
+
 // initialization
 void initControlServer();
 void initStopServer();
diff --git a/slsReceiverSoftware/src/DataProcessor.h b/slsReceiverSoftware/src/DataProcessor.h
index e21d73c90..2f1c8f4ba 100644
--- a/slsReceiverSoftware/src/DataProcessor.h
+++ b/slsReceiverSoftware/src/DataProcessor.h
@@ -168,7 +168,7 @@ class DataProcessor : private virtual slsDetectorDefs, public ThreadObject {
     uint32_t streamingTimerInMs;
     uint32_t streamingStartFnum;
     uint32_t currentFreqCount{0};
-    struct timespec timerbegin{};
+    struct timespec timerbegin {};
     bool framePadding;
     std::atomic<bool> startedFlag{false};
     std::atomic<uint64_t> firstIndex{0};
diff --git a/slsReceiverSoftware/src/GeneralData.h b/slsReceiverSoftware/src/GeneralData.h
index 7147d0e2c..34a329542 100644
--- a/slsReceiverSoftware/src/GeneralData.h
+++ b/slsReceiverSoftware/src/GeneralData.h
@@ -63,8 +63,8 @@ class GeneralData {
     slsDetectorDefs::frameDiscardPolicy frameDiscardMode{
         slsDetectorDefs::NO_DISCARD};
 
-    GeneralData() {};
-    virtual ~GeneralData() {};
+    GeneralData(){};
+    virtual ~GeneralData(){};
 
     // Returns the pixel depth in byte, 4 bits being 0.5 byte
     float GetPixelDepth() { return float(dynamicRange) / 8; }
diff --git a/slsReceiverSoftware/tests/test-ArrangeDataBasedOnBitList.cpp b/slsReceiverSoftware/tests/test-ArrangeDataBasedOnBitList.cpp
index 7ad93b908..e8b586184 100644
--- a/slsReceiverSoftware/tests/test-ArrangeDataBasedOnBitList.cpp
+++ b/slsReceiverSoftware/tests/test-ArrangeDataBasedOnBitList.cpp
@@ -47,8 +47,8 @@ class GeneralDataTest : public GeneralData {
 // dummy DataProcessor class for testing
 class DataProcessorTest : public DataProcessor {
   public:
-    DataProcessorTest() : DataProcessor(0) {};
-    ~DataProcessorTest() {};
+    DataProcessorTest() : DataProcessor(0){};
+    ~DataProcessorTest(){};
     void ArrangeDbitData(size_t &size, char *data) {
         DataProcessor::ArrangeDbitData(size, data);
     }
diff --git a/slsSupportLib/include/sls/versionAPI.h b/slsSupportLib/include/sls/versionAPI.h
index b9a1d824d..b6f8df9b3 100644
--- a/slsSupportLib/include/sls/versionAPI.h
+++ b/slsSupportLib/include/sls/versionAPI.h
@@ -3,10 +3,10 @@
 /** API versions */
 #define APILIB       "developer 0x241122"
 #define APIRECEIVER  "developer 0x241122"
-#define APICTB       "developer 0x250310"
 #define APIGOTTHARD2 "developer 0x250310"
 #define APIMOENCH    "developer 0x250310"
 #define APIEIGER     "developer 0x250310"
 #define APIXILINXCTB "developer 0x250311"
 #define APIJUNGFRAU  "developer 0x250318"
 #define APIMYTHEN3   "developer 0x250409"
+#define APICTB       "developer 0x250519"