diff --git a/cpu/ppc/ppcmmu.cpp b/cpu/ppc/ppcmmu.cpp
index 333a51a..b211cf0 100644
--- a/cpu/ppc/ppcmmu.cpp
+++ b/cpu/ppc/ppcmmu.cpp
@@ -331,6 +331,17 @@ uint8_t* mmu_get_dma_mem(uint32_t addr, uint32_t size, bool* is_writable)
     }
 }
 
+
+void mmu_dma_store_quad(uint32_t addr, uint32_t value) {
+    mmu_write_vmem<uint32_t>(ppc_effective_address, value);
+}
+
+uint8_t* mmu_dma_load_quad(uint32_t addr) {
+    uint32_t ret_value = mmu_read_vmem<uint32_t>(addr);
+    uint8_t ret_array[4] = {(uint8_t)ret_value, (uint8_t)(ret_value >> 8), (uint8_t)(ret_value >> 16), (uint8_t)(ret_value >> 24)}; 
+    return ret_array;
+}
+
 // primary ITLB for all MMU modes
 static std::array<TLBEntry, TLB_SIZE> itlb1_mode1;
 static std::array<TLBEntry, TLB_SIZE> itlb1_mode2;
diff --git a/cpu/ppc/ppcmmu.h b/cpu/ppc/ppcmmu.h
index f0d3ea5..0ffd9ff 100644
--- a/cpu/ppc/ppcmmu.h
+++ b/cpu/ppc/ppcmmu.h
@@ -107,6 +107,8 @@ extern std::function<void(uint32_t bat_reg)> ibat_update;
 extern std::function<void(uint32_t bat_reg)> dbat_update;
 
 extern uint8_t* mmu_get_dma_mem(uint32_t addr, uint32_t size, bool* is_writable);
+extern void mmu_dma_store_quad(uint32_t addr, uint32_t value);
+extern uint8_t* mmu_dma_load_quad(uint32_t addr);
 
 extern void mmu_change_mode(void);
 extern void mmu_pat_ctx_changed();
diff --git a/devices/common/dbdma.cpp b/devices/common/dbdma.cpp
index a4b1a49..ca10a21 100644
--- a/devices/common/dbdma.cpp
+++ b/devices/common/dbdma.cpp
@@ -116,10 +116,33 @@ uint8_t DMAChannel::interpret_cmd() {
         this->cmd_in_progress = true;
         break;
     case DBDMA_Cmd::STORE_QUAD:
-        LOG_F(ERROR, "Unsupported DMA Command STORE_QUAD");
+        if (cmd_struct.cmd_key != 6) {
+            LOG_F(ERROR, "Illegal key value for STORE_QUAD");
+        } 
+        else {
+            if (cmd_struct.req_count & 0x4) {
+                cmd_struct.req_count = 4;
+            } 
+            else if (cmd_struct.req_count & 0x2) {
+                cmd_struct.req_count = 2;
+            } 
+            else {
+                cmd_struct.req_count = 1;
+            }
+
+            mmu_dma_store_quad(cmd_struct.address, cmd_struct.cmd_arg);
+            this->queue_len       = 4;
+            this->cmd_in_progress = true;
+        }
         break;
     case DBDMA_Cmd::LOAD_QUAD:
-        LOG_F(ERROR, "Unsupported DMA Command LOAD_QUAD");
+        if (cmd_struct.cmd_key != 6) {
+            LOG_F(ERROR, "Illegal key value for LOAD_QUAD");
+        } else {
+            this->queue_data      = mmu_dma_load_quad(cmd_struct.address);
+            this->queue_len       = 4;
+            this->cmd_in_progress = true;
+        }
         break;
     case DBDMA_Cmd::NOP:
         LOG_F(ERROR, "Unsupported DMA Command NOP");