diff --git a/.github/.cSpellWords.txt b/.github/.cSpellWords.txt
index 4b9f2d5f0b..f6e02d5937 100644
--- a/.github/.cSpellWords.txt
+++ b/.github/.cSpellWords.txt
@@ -1593,6 +1593,7 @@ XPBL
 Xplorer
 XPROT
 xpsr
+XSCUGIC
 xtopology
 xtopologyp
 xzvf
diff --git a/source/portable/NetworkInterface/Zynq/NetworkInterface.c b/source/portable/NetworkInterface/Zynq/NetworkInterface.c
index 8b5913bf16..a90c0d14ac 100644
--- a/source/portable/NetworkInterface/Zynq/NetworkInterface.c
+++ b/source/portable/NetworkInterface/Zynq/NetworkInterface.c
@@ -149,21 +149,21 @@ struct xtopology_t xXTopologies[ XPAR_XEMACPS_NUM_INSTANCES ] =
 {
     [ 0 ] =
         {
-        .emac_baseaddr    = XPAR_PS7_ETHERNET_0_BASEADDR,
+        .emac_baseaddr    = ZYNQ_ETHERNET_0_BASEADDR,
         .emac_type        = xemac_type_emacps,
         .intc_baseaddr    = 0x0,
         .intc_emac_intr   = 0x0,
-        .scugic_baseaddr  = XPAR_PS7_SCUGIC_0_BASEADDR,
+        .scugic_baseaddr  = ZYNQ_SCUGIC_0_BASEADDR,
         .scugic_emac_intr = 0x36,
         },
     #if ( XPAR_XEMACPS_NUM_INSTANCES > 1 )
         [ 1 ] =
         {
-        .emac_baseaddr    = XPAR_PS7_ETHERNET_1_BASEADDR,
+        .emac_baseaddr    = ZYNQ_ETHERNET_1_BASEADDR,
         .emac_type        = xemac_type_emacps,
         .intc_baseaddr    = 0x0,
         .intc_emac_intr   = 0x0,
-        .scugic_baseaddr  = XPAR_PS7_SCUGIC_0_BASEADDR,
+        .scugic_baseaddr  = ZYNQ_SCUGIC_0_BASEADDR,
         .scugic_emac_intr = 0x4D,   /* See "7.2.3 Shared Peripheral Interrupts (SPI)" */
         },
     #endif
@@ -173,14 +173,18 @@ XEmacPs_Config mac_configs[ XPAR_XEMACPS_NUM_INSTANCES ] =
 {
     [ 0 ] =
         {
-        .DeviceId    = XPAR_PS7_ETHERNET_0_DEVICE_ID, /**< Unique ID  of device, used for 'xEMACIndex' */
-        .BaseAddress = XPAR_PS7_ETHERNET_0_BASEADDR   /**< Physical base address of IPIF registers */
+        #ifndef SDT
+            .DeviceId = XPAR_PS7_ETHERNET_0_DEVICE_ID, /**< Unique ID  of device, used for 'xEMACIndex' */
+        #endif
+        .BaseAddress  = ZYNQ_ETHERNET_0_BASEADDR       /**< Physical base address of IPIF registers */
         },
     #if ( XPAR_XEMACPS_NUM_INSTANCES > 1 )
         [ 1 ] =
         {
-        .DeviceId    = XPAR_PS7_ETHERNET_1_DEVICE_ID, /**< Unique ID  of device */
-        .BaseAddress = XPAR_PS7_ETHERNET_1_BASEADDR   /**< Physical base address of IPIF registers */
+        #ifndef SDT
+            .DeviceId = XPAR_PS7_ETHERNET_1_DEVICE_ID, /**< Unique ID  of device */
+        #endif
+        .BaseAddress  = ZYNQ_ETHERNET_1_BASEADDR       /**< Physical base address of IPIF registers */
         },
     #endif
 };
diff --git a/source/portable/NetworkInterface/Zynq/uncached_memory.c b/source/portable/NetworkInterface/Zynq/uncached_memory.c
index d13625d7cd..7a7c3b6658 100644
--- a/source/portable/NetworkInterface/Zynq/uncached_memory.c
+++ b/source/portable/NetworkInterface/Zynq/uncached_memory.c
@@ -82,7 +82,11 @@
     #ifndef uncMEMORY_SIZE
         #define uncMEMORY_SIZE        uncMINIMAL_MEMORY_SIZE
     #endif
-    #define DDR_MEMORY_END            ( XPAR_PS7_DDR_0_S_AXI_HIGHADDR + 1 )
+    #ifndef SDT
+        #define DDR_MEMORY_END        ( XPAR_PS7_DDR_0_S_AXI_HIGHADDR + 1 )
+    #else
+        #define DDR_MEMORY_END        ( XPAR_PS7_DDR_0_HIGHADDRESS + 1 )
+    #endif
     #define uncMEMORY_ATTRIBUTE       0x1C02
 #endif /* ( ipconfigULTRASCALE == 1 ) */
 
diff --git a/source/portable/NetworkInterface/Zynq/x_emacpsif.h b/source/portable/NetworkInterface/Zynq/x_emacpsif.h
index 378431f066..cd18fd997e 100644
--- a/source/portable/NetworkInterface/Zynq/x_emacpsif.h
+++ b/source/portable/NetworkInterface/Zynq/x_emacpsif.h
@@ -38,8 +38,25 @@
     extern "C" {
     #endif
 
-    #define XPAR_PS7_ETHERNET_1_DEVICE_ID    1
-    #define XPAR_PS7_ETHERNET_1_BASEADDR     0xE000C000
+    #ifdef SDT
+        #define ZYNQ_SCUGIC_0_BASEADDR          XPAR_XSCUGIC_0_BASEADDR
+        #define ZYNQ_ETHERNET_0_BASEADDR        XPAR_XEMACPS_0_BASEADDR
+        #if ( XPAR_XEMACPS_NUM_INSTANCES > 1 )
+            #define ZYNQ_ETHERNET_1_BASEADDR    XPAR_XEMACPS_1_BASEADDR
+        #endif
+    #else
+        #ifndef XPAR_PS7_ETHERNET_1_DEVICE_ID
+            #define XPAR_PS7_ETHERNET_1_DEVICE_ID    1
+        #endif
+        #ifndef XPAR_PS7_ETHERNET_1_BASEADDR
+            #define XPAR_PS7_ETHERNET_1_BASEADDR     0xE000C000
+        #endif
+        #define ZYNQ_SCUGIC_0_BASEADDR               XPAR_PS7_SCUGIC_0_BASEADDR
+        #define ZYNQ_ETHERNET_0_BASEADDR             XPAR_PS7_ETHERNET_0_BASEADDR
+        #if ( XPAR_XEMACPS_NUM_INSTANCES > 1 )
+            #define ZYNQ_ETHERNET_1_BASEADDR         XPAR_PS7_ETHERNET_1_BASEADDR
+        #endif
+    #endif /* ifdef SDT */
 
     extern XEmacPs_Config mac_configs[ XPAR_XEMACPS_NUM_INSTANCES ];
 
@@ -145,6 +162,8 @@
     void clean_dma_txdescs( xemacpsif_s * xemacpsif );
     void resetrx_on_no_rxdata( xemacpsif_s * xemacpsif );
 
+    BaseType_t get_xEMACIndex( const XEmacPs * xemacpsp );
+
 /**
  * @brief Initialise the interface number 'xIndex'. Do not call directly.
  */
diff --git a/source/portable/NetworkInterface/Zynq/x_emacpsif_dma.c b/source/portable/NetworkInterface/Zynq/x_emacpsif_dma.c
index 69e2f809eb..34b9d8d436 100644
--- a/source/portable/NetworkInterface/Zynq/x_emacpsif_dma.c
+++ b/source/portable/NetworkInterface/Zynq/x_emacpsif_dma.c
@@ -129,7 +129,7 @@ static void prvPassEthMessages( NetworkBufferDescriptor_t * pxDescriptor );
 int is_tx_space_available( xemacpsif_s * xemacpsif )
 {
     size_t uxCount;
-    BaseType_t xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    BaseType_t xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
 
     if( xTXDescriptorSemaphores[ xEMACIndex ] != NULL )
     {
@@ -147,7 +147,7 @@ void emacps_check_tx( xemacpsif_s * xemacpsif )
 {
     int tail = xemacpsif->txTail;
     int head = xemacpsif->txHead;
-    BaseType_t xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    BaseType_t xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
     size_t uxCount = ( ( UBaseType_t ) ipconfigNIC_N_TX_DESC ) - uxSemaphoreGetCount( xTXDescriptorSemaphores[ xEMACIndex ] );
 
     /* uxCount is the number of TX descriptors that are in use by the DMA. */
@@ -210,7 +210,7 @@ void emacps_send_handler( void * arg )
     BaseType_t xEMACIndex;
 
     xemacpsif = ( xemacpsif_s * ) arg;
-    xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
 
     /* This function is called from an ISR. The Xilinx ISR-handler has already
      * cleared the TXCOMPL and TXSR_USEDREAD status bits in the XEMACPS_TXSR register.
@@ -254,7 +254,7 @@ XStatus emacps_send_message( xemacpsif_s * xemacpsif,
     int txHead = xemacpsif->txHead;
     int iHasSent = 0;
     uint32_t ulBaseAddress = xemacpsif->emacps.Config.BaseAddress;
-    BaseType_t xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    BaseType_t xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
     TickType_t xBlockTimeTicks = pdMS_TO_TICKS( 5000U );
 
     /* This driver wants to own all network buffers which are to be transmitted. */
@@ -362,7 +362,7 @@ void emacps_recv_handler( void * arg )
 
     xemacpsif = ( xemacpsif_s * ) arg;
     xemacpsif->isr_events |= EMAC_IF_RX_EVENT;
-    xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
 
     /* The driver has already cleared the FRAMERX, BUFFNA and error bits
      * in the XEMACPS_RXSR register,
@@ -491,7 +491,7 @@ int emacps_check_rx( xemacpsif_s * xemacpsif,
     int rx_bytes;
     volatile int msgCount = 0;
     int rxHead = xemacpsif->rxHead;
-    BaseType_t xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    BaseType_t xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
     BaseType_t xAccepted;
 
     #if ( ipconfigUSE_LINKED_RX_MESSAGES != 0 )
@@ -632,7 +632,7 @@ void clean_dma_txdescs( xemacpsif_s * xemacpsif )
 {
     int index;
     unsigned char * ucTxBuffer;
-    BaseType_t xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    BaseType_t xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
 
     /* Clear all TX descriptors and assign uncached memory to each descriptor.
      * "tx_space" points to the first available TX buffer. */
@@ -653,7 +653,7 @@ void clean_dma_txdescs( xemacpsif_s * xemacpsif )
 XStatus init_dma( xemacpsif_s * xemacpsif )
 {
     NetworkBufferDescriptor_t * pxBuffer;
-    BaseType_t xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    BaseType_t xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
 
     int iIndex;
     UBaseType_t xRxSize;
diff --git a/source/portable/NetworkInterface/Zynq/x_emacpsif_hw.c b/source/portable/NetworkInterface/Zynq/x_emacpsif_hw.c
index b73a06e9e0..34a564e3a4 100644
--- a/source/portable/NetworkInterface/Zynq/x_emacpsif_hw.c
+++ b/source/portable/NetworkInterface/Zynq/x_emacpsif_hw.c
@@ -91,7 +91,7 @@ void emacps_error_handler( void * arg,
     BaseType_t xEMACIndex;
 
     xemacpsif = ( xemacpsif_s * ) ( arg );
-    xEMACIndex = xemacpsif->emacps.Config.DeviceId;
+    xEMACIndex = get_xEMACIndex( &xemacpsif->emacps );
 
     if( ( Direction != XEMACPS_SEND ) || ( ErrorWord != XEMACPS_TXSR_USEDREAD_MASK ) )
     {
@@ -158,7 +158,7 @@ static void emacps_handle_error( void * arg,
     xemacpsif = ( xemacpsif_s * ) ( arg );
 
     xemacps = &xemacpsif->emacps;
-    xEMACIndex = xemacps->Config.DeviceId;
+    xEMACIndex = get_xEMACIndex( xemacps );
 
     last_err_msg = NULL;
 
@@ -253,3 +253,17 @@ void HandleTxErrors( xemacpsif_s * xemacpsif )
     }
     /*taskEXIT_CRITICAL( ); */
 }
+
+BaseType_t get_xEMACIndex( const XEmacPs * xemacpsp )
+{
+    #if ( XPAR_XEMACPS_NUM_INSTANCES == 1 )
+        ( void ) xemacpsp;
+        return 0;
+    #else
+        #ifndef SDT
+            return xemacpsp->Config.DeviceId;
+        #else
+            return xemacpsp->Config.BaseAddress != ZYNQ_ETHERNET_0_BASEADDR;
+        #endif
+    #endif
+}
diff --git a/source/portable/NetworkInterface/Zynq/x_emacpsif_physpeed.c b/source/portable/NetworkInterface/Zynq/x_emacpsif_physpeed.c
index 9b055fe710..6ea17fe921 100644
--- a/source/portable/NetworkInterface/Zynq/x_emacpsif_physpeed.c
+++ b/source/portable/NetworkInterface/Zynq/x_emacpsif_physpeed.c
@@ -173,7 +173,7 @@ static int detect_phy( XEmacPs * xemacpsp )
         {
             /* Found a valid PHY address */
             FreeRTOS_printf( ( "XEmacPs detect_phy: PHY detected at address %d.\n", ( unsigned ) phy_addr ) );
-            phy_detected[ xemacpsp->Config.DeviceId ] = phy_addr;
+            phy_detected[ get_xEMACIndex( xemacpsp ) ] = phy_addr;
             return phy_addr;
         }
     }
@@ -506,7 +506,7 @@ static void SetUpSLCRDivisors( int mac_baseaddr,
     volatile u32 slcrBaseAddress;
 
     #ifndef PEEP
-        u32 SlcrDiv0;
+        u32 SlcrDiv0 = 0;
         u32 SlcrDiv1 = 0;
         u32 SlcrTxClkCntrl;
     #endif
@@ -591,11 +591,19 @@ static void SetUpSLCRDivisors( int mac_baseaddr,
             }
         }
 
-        SlcrTxClkCntrl = *( volatile unsigned int * ) ( slcrBaseAddress );
-        SlcrTxClkCntrl &= EMACPS_SLCR_DIV_MASK;
-        SlcrTxClkCntrl |= ( SlcrDiv1 << 20 );
-        SlcrTxClkCntrl |= ( SlcrDiv0 << 8 );
-        *( volatile unsigned int * ) ( slcrBaseAddress ) = SlcrTxClkCntrl;
+        /* SDT drivers should not write to the register */
+        #ifndef SDT
+            SlcrTxClkCntrl = *( volatile unsigned int * ) ( slcrBaseAddress );
+            SlcrTxClkCntrl &= EMACPS_SLCR_DIV_MASK;
+            SlcrTxClkCntrl |= ( SlcrDiv1 << 20 );
+            SlcrTxClkCntrl |= ( SlcrDiv0 << 8 );
+            *( volatile unsigned int * ) ( slcrBaseAddress ) = SlcrTxClkCntrl;
+        #else
+            ( void ) SlcrTxClkCntrl;
+            ( void ) SlcrDiv0;
+            ( void ) SlcrDiv1;
+            ( void ) slcrBaseAddress;
+        #endif
     #endif /* ifdef PEEP */
     *( volatile unsigned int * ) ( SLCR_LOCK_ADDR ) = SLCR_LOCK_KEY_VALUE;
 }