diff --git a/src/gateware/aux_controller.py b/src/gateware/aux_controller.py
index c458e25a..66626864 100644
--- a/src/gateware/aux_controller.py
+++ b/src/gateware/aux_controller.py
@@ -17,7 +17,6 @@ class DRTIOAuxControllerAxi(Module):
         self.submodules.transmitter = Transmitter(link_layer, len(self.bus.w.data))
         self.submodules.receiver = Receiver(link_layer, len(self.bus.w.data))
 
-        # probably will need to make axi.SRAM based on wb code
         tx_sdram_if = SRAM(self.transmitter.mem, read_only=False)
         rx_sdram_if = SRAM(self.receiver.mem, read_only=True)
         wsb = log2_int(len(self.bus.w.data)//8)
@@ -33,3 +32,15 @@ class DRTIOAuxControllerAxi(Module):
 
     def get_csrs(self):
         return self.transmitter.get_csrs() + self.receiver.get_csrs()
+
+@FullMemoryWE()
+class DRTIOAuxControllerBare(Module):
+    # Barebones version of the AuxController. No SRAM, no decoders.
+    # add memories manually from tx and rx in target code.
+    def __init__(self, link_layer):
+        self.bus = axi.Interface()
+        self.submodules.transmitter = Transmitter(link_layer, len(self.bus.w.data))
+        self.submodules.receiver = Receiver(link_layer, len(self.bus.w.data))
+
+    def get_csrs(self):
+        return self.transmitter.get_csrs() + self.receiver.get_csrs()
diff --git a/src/gateware/kasli_soc.py b/src/gateware/kasli_soc.py
index bd9be937..0fabcd95 100755
--- a/src/gateware/kasli_soc.py
+++ b/src/gateware/kasli_soc.py
@@ -288,12 +288,14 @@ class GenericMaster(SoCCore):
             self.drtio_cri.append(core.cri)
             self.csr_devices.append(core_name)
 
-            coreaux = cdr(aux_controller.DRTIOAuxControllerAxi(core.link_layer))
+            coreaux = cdr(aux_controller.DRTIOAuxControllerBare(core.link_layer))
             setattr(self.submodules, coreaux_name, coreaux)
             self.csr_devices.append(coreaux_name)
 
-            memory_address = self.mem_map["drtioaux"] + 0x800*i
-            self.register_mem(memory_name, memory_address, 0x800, coreaux.bus)
+            memory_address, size = self.axi2csr.add_memory(coreaux.transmitter.mem, read_only=False)
+            # rcv in upper half of the memory, thus added second
+            self.axi2csr.add_memory(coreaux.receiver.mem, read_only=False)
+            self.add_memory_region(memory_name, self.mem_map["csr"] + memory_address, size * 2)
         self.rustc_cfg["has_drtio"] = None
         self.rustc_cfg["has_drtio_routing"] = None
         self.add_csr_group("drtio", drtio_csr_group)
@@ -427,12 +429,16 @@ class GenericSatellite(SoCCore):
                 self.drtio_cri.append(core.cri)
                 self.csr_devices.append(corerep_name)
 
-            coreaux = cdr(aux_controller.DRTIOAuxControllerAxi(core.link_layer))
+            coreaux = cdr(aux_controller.DRTIOAuxControllerBare(core.link_layer))
             setattr(self.submodules, coreaux_name, coreaux)
             self.csr_devices.append(coreaux_name)
 
-            memory_address = self.mem_map["drtioaux"] + 0x800*i
-            self.register_mem(memory_name, memory_address, 0x800, coreaux.bus)
+            memory_address, size = self.axi2csr.add_memory(coreaux.transmitter.mem, read_only=False)
+            # rcv in upper half of the memory, thus added second
+            self.axi2csr.add_memory(coreaux.receiver.mem, read_only=False)
+            # and registered in PS interface
+            # manually, because software refers to rx/tx by halves of entire memory block, not names
+            self.add_memory_region(memory_name, self.mem_map["csr"] + memory_address, size * 2)
         self.config["has_drtio"] = None
         self.config["has_drtio_routing"] = None
         self.add_csr_group("drtioaux", drtioaux_csr_group)
diff --git a/src/gateware/zc706.py b/src/gateware/zc706.py
index 9c17b4fb..26a4e769 100755
--- a/src/gateware/zc706.py
+++ b/src/gateware/zc706.py
@@ -330,12 +330,16 @@ class _SatelliteBase(SoCCore):
             # Repeaters - there would be for i != 0 - however zc706 only has one SFP
             # and no other means to connect to 
 
-            coreaux = cdr(aux_controller.DRTIOAuxControllerAxi(core.link_layer))
+            coreaux = cdr(aux_controller.DRTIOAuxControllerBare(core.link_layer))
             setattr(self.submodules, coreaux_name, coreaux)
             self.csr_devices.append(coreaux_name)
 
-            memory_address = self.mem_map["drtioaux"] + 0x800*i
-            self.register_mem(memory_name, memory_address, 0x800, coreaux.bus)
+            memory_address, size = self.axi2csr.add_memory(coreaux.transmitter.mem, read_only=False)
+            # rcv in upper half of the memory, thus added second
+            self.axi2csr.add_memory(coreaux.receiver.mem, read_only=False)
+            # and registered in PS interface
+            # manually, because software refers to rx/tx by halves of entire memory block, not names
+            self.add_memory_region(memory_name, self.mem_map["csr"] + memory_address, size * 2)
         self.rustc_cfg["has_drtio"] = None
         # it does not have drtio routing support!
         self.add_csr_group("drtioaux", drtioaux_csr_group)