diff --git a/src/dma3_manager.c b/src/dma3_manager.c
index bb015c5cfe..725bfb0e75 100644
--- a/src/dma3_manager.c
+++ b/src/dma3_manager.c
@@ -29,76 +29,92 @@ void ClearDma3Requests(void)
     gDma3ManagerLocked = FALSE;
 }
 
-#ifdef NONMATCHING
+// Maximum amount of data will will transfer in one operation
+#define DMA_MAX_BLOCK_SIZE 0x1000
+
+#define Dma3CopyLarge_(src, dest, size, bit)               \
+{                                                          \
+    const void *_src = src;                                \
+    void *_dest = dest;                                    \
+    u32 _size = size;                                      \
+    while (1)                                              \
+    {                                                      \
+        if (_size <= DMA_MAX_BLOCK_SIZE)                   \
+        {                                                  \
+            DmaCopy##bit(3, _src, _dest, _size);           \
+            break;                                         \
+        }                                                  \
+        DmaCopy##bit(3, _src, _dest, DMA_MAX_BLOCK_SIZE);  \
+        _src += DMA_MAX_BLOCK_SIZE;                        \
+        _dest += DMA_MAX_BLOCK_SIZE;                       \
+        _size -= DMA_MAX_BLOCK_SIZE;                       \
+    }                                                      \
+}
+
+#define Dma3CopyLarge16_(src, dest, size) Dma3CopyLarge_(src, dest, size, 16)
+#define Dma3CopyLarge32_(src, dest, size) Dma3CopyLarge_(src, dest, size, 32)
+
+#define Dma3FillLarge_(value, dest, size, bit)             \
+{                                                          \
+    void *_dest = dest;                                    \
+    u32 _size = size;                                      \
+    while (1)                                              \
+    {                                                      \
+        if (_size <= DMA_MAX_BLOCK_SIZE)                   \
+        {                                                  \
+            DmaFill##bit(3, value, _dest, _size);          \
+            break;                                         \
+        }                                                  \
+        DmaFill##bit(3, value, _dest, DMA_MAX_BLOCK_SIZE); \
+        _dest += DMA_MAX_BLOCK_SIZE;                       \
+        _size -= DMA_MAX_BLOCK_SIZE;                       \
+    }                                                      \
+}
+
+#define Dma3FillLarge16_(value, dest, size) Dma3FillLarge_(value, dest, size, 16)
+#define Dma3FillLarge32_(value, dest, size) Dma3FillLarge_(value, dest, size, 32)
+
+
 void ProcessDma3Requests(void)
 {
-    // NOTE: the fillerA member of the DMA struct is actually u32 value;
-    u16 total_size;
+    u16 totalSize;
 
     if (gDma3ManagerLocked)
         return;
 
-    total_size = 0;
+    totalSize = 0;
 
     // as long as there are DMA requests to process (unless size or vblank is an issue), do not exit
-    while (gDma3Requests[gDma3RequestCursor].size)
+    while (gDma3Requests[gDma3RequestCursor].size != 0)
     {
-        total_size += gDma3Requests[gDma3RequestCursor].size;
+        totalSize += gDma3Requests[gDma3RequestCursor].size;
 
-        if (total_size > 0xA000)
+        if (totalSize > 0xA000)
             return; // don't do too much at once
-
-        if (REG_VCOUNT > 224)
-            return;// we're about to leave vblank, stop
+        if (*(u8 *)REG_ADDR_VCOUNT > 224)
+            return; // we're about to leave vblank, stop
 
         switch (gDma3Requests[gDma3RequestCursor].mode)
         {
         case 1: // regular 32-bit copy
-            // _08000C8C
-            if(gDma3Requests[gDma3RequestCursor].size <= 0x1000)
-            {
-                DmaCopy32(3, gDma3Requests[gDma3RequestCursor].src, gDma3Requests[gDma3RequestCursor].dest, gDma3Requests[gDma3RequestCursor].size);
-                break;
-            }
-            while (gDma3Requests[gDma3RequestCursor].size > 0x1000)
-            {
-                DmaCopy32(3, gDma3Requests[gDma3RequestCursor].src, gDma3Requests[gDma3RequestCursor].dest, 0x1000);
-                gDma3Requests[gDma3RequestCursor].src += 0x1000;
-                gDma3Requests[gDma3RequestCursor].dest += 0x1000;
-                gDma3Requests[gDma3RequestCursor].size -= 0x1000;
-            }
-            DmaCopy32(3, gDma3Requests[gDma3RequestCursor].src, gDma3Requests[gDma3RequestCursor].dest, gDma3Requests[gDma3RequestCursor].size);
+            Dma3CopyLarge32_(gDma3Requests[gDma3RequestCursor].src,
+                             gDma3Requests[gDma3RequestCursor].dest,
+                             gDma3Requests[gDma3RequestCursor].size);
             break;
         case 2: // repeat a single 32-bit value across RAM
-            // _08000CD0
-            while (gDma3Requests[gDma3RequestCursor].size > 0x1000)
-            {
-                DmaFill32(3, gDma3Requests[gDma3RequestCursor].value, gDma3Requests[gDma3RequestCursor].dest, 0x1000);
-                gDma3Requests[gDma3RequestCursor].dest += 0x1000;
-                gDma3Requests[gDma3RequestCursor].size -= 0x1000;
-            }
-            DmaFill32(3, gDma3Requests[gDma3RequestCursor].value, gDma3Requests[gDma3RequestCursor].dest, gDma3Requests[gDma3RequestCursor].size);
+            Dma3FillLarge32_(gDma3Requests[gDma3RequestCursor].value,
+                             gDma3Requests[gDma3RequestCursor].dest,
+                             gDma3Requests[gDma3RequestCursor].size);
             break;
         case 3:    // regular 16-bit copy
-             // _08000D3C
-            while (gDma3Requests[gDma3RequestCursor].size > 0x1000)
-            {
-                DmaCopy16(3, gDma3Requests[gDma3RequestCursor].src, gDma3Requests[gDma3RequestCursor].dest, 0x1000);
-                gDma3Requests[gDma3RequestCursor].src += 0x1000;
-                gDma3Requests[gDma3RequestCursor].dest += 0x1000;
-                gDma3Requests[gDma3RequestCursor].size -= 0x1000;
-            }
-            DmaCopy16(3, gDma3Requests[gDma3RequestCursor].src, gDma3Requests[gDma3RequestCursor].dest, gDma3Requests[gDma3RequestCursor].size);
+            Dma3CopyLarge16_(gDma3Requests[gDma3RequestCursor].src,
+                             gDma3Requests[gDma3RequestCursor].dest,
+                             gDma3Requests[gDma3RequestCursor].size);
             break;
         case 4: // repeat a single 16-bit value across RAM
-            // _08000D88
-            while (gDma3Requests[gDma3RequestCursor].size > 0x1000)
-            {
-                DmaFill16(3, gDma3Requests[gDma3RequestCursor].value, gDma3Requests[gDma3RequestCursor].dest, 0x1000);
-                gDma3Requests[gDma3RequestCursor].dest += 0x1000;
-                gDma3Requests[gDma3RequestCursor].size -= 0x1000;
-            }
-            DmaFill16(3, gDma3Requests[gDma3RequestCursor].value, gDma3Requests[gDma3RequestCursor].dest, gDma3Requests[gDma3RequestCursor].size);
+            Dma3FillLarge16_(gDma3Requests[gDma3RequestCursor].value,
+                             gDma3Requests[gDma3RequestCursor].dest,
+                             gDma3Requests[gDma3RequestCursor].size);
             break;
         }
         gDma3Requests[gDma3RequestCursor].src = NULL;
@@ -112,322 +128,6 @@ void ProcessDma3Requests(void)
             gDma3RequestCursor = 0;
     }
 }
-#else
-__attribute__((naked))
-void ProcessDma3Requests(void)
-{
-    asm(".syntax unified\n\
-    push {r4-r7,lr}\n\
-    mov r7, r10\n\
-    mov r6, r9\n\
-    mov r5, r8\n\
-    push {r5-r7}\n\
-    sub sp, 0xC\n\
-    ldr r0, =gDma3ManagerLocked\n\
-    ldrb r0, [r0]\n\
-    cmp r0, 0\n\
-    beq _08000C06\n\
-    b _08000E46\n\
-_08000C06:\n\
-    movs r0, 0\n\
-    str r0, [sp, 0x8]\n\
-    ldr r1, =gDma3Requests\n\
-    ldr r2, =gDma3RequestCursor\n\
-    ldrb r0, [r2]\n\
-    lsls r0, 4\n\
-    adds r0, r1\n\
-    ldrh r0, [r0, 0x8]\n\
-    mov r12, r2\n\
-    cmp r0, 0\n\
-    bne _08000C1E\n\
-    b _08000E46\n\
-_08000C1E:\n\
-    mov r8, r1\n\
-    adds r1, 0x4\n\
-    mov r10, r1\n\
-    movs r6, 0x80\n\
-    lsls r6, 5\n\
-    ldr r7, =0x040000D4 @REG_DMA3\n\
-    movs r2, 0\n\
-    mov r9, r2\n\
-_08000C2E:\n\
-    mov r3, r12 @ gDma3RequestCursor\n\
-    ldrb r0, [r3]\n\
-    lsls r5, r0, 4\n\
-    mov r0, r8  @ gDma3Requests\n\
-    adds r1, r5, r0 @ gDma3Requests[gDma3RequestCursor]\n\
-    ldrh r0, [r1, 0x8] @ gDma3Requests[gDma3RequestCursor].size\n\
-    ldr r2, [sp, 0x8]\n\
-    adds r0, r2, r0\n\
-    lsls r0, 16\n\
-    lsrs r0, 16\n\
-    str r0, [sp, 0x8]\n\
-    movs r0, 0xA0\n\
-    lsls r0, 8\n\
-    ldr r3, [sp, 0x8]\n\
-    cmp r3, r0\n\
-    bls _08000C50\n\
-    b _08000E46\n\
-_08000C50:\n\
-    ldr r0, =0x04000006 @REG_VCOUNT\n\
-    ldrb r0, [r0]\n\
-    cmp r0, 0xE0\n\
-    bls _08000C5A\n\
-    b _08000E46\n\
-_08000C5A:\n\
-    ldrh r0, [r1, 0xA]\n\
-    cmp r0, 0x2\n\
-    beq _08000CD0\n\
-    cmp r0, 0x2\n\
-    bgt _08000C80\n\
-    cmp r0, 0x1\n\
-    beq _08000C8C\n\
-    b _08000DF0\n\
-    .pool\n\
-_08000C80:\n\
-    cmp r0, 0x3\n\
-    beq _08000D3C\n\
-    cmp r0, 0x4\n\
-    bne _08000C8A\n\
-    b _08000D88\n\
-_08000C8A:\n\
-    b _08000DF0\n\
-_08000C8C:\n\
-    ldr r3, [r1]\n\
-    mov r2, r10\n\
-    adds r0, r5, r2\n\
-    ldr r2, [r0]\n\
-    ldrh r1, [r1, 0x8]\n\
-    cmp r1, r6\n\
-    bhi _08000CA6\n\
-    str r3, [r7]\n\
-    str r2, [r7, 0x4]\n\
-    lsrs r0, r1, 2\n\
-    movs r1, 0x84\n\
-    lsls r1, 24\n\
-    b _08000DAA\n\
-_08000CA6:\n\
-    ldr r4, =0x040000D4 @REG_DMA3\n\
-    str r3, [r4]\n\
-    str r2, [r4, 0x4]\n\
-    ldr r0, =0x84000400\n\
-    str r0, [r4, 0x8]\n\
-    ldr r0, [r4, 0x8]\n\
-    adds r3, r6\n\
-    adds r2, r6\n\
-    subs r1, r6\n\
-    cmp r1, r6\n\
-    bhi _08000CA6\n\
-    str r3, [r4]\n\
-    str r2, [r4, 0x4]\n\
-    lsrs r0, r1, 2\n\
-    movs r1, 0x84\n\
-    lsls r1, 24\n\
-    b _08000D76\n\
-    .pool\n\
-_08000CD0:\n\
-    mov r3, r10\n\
-    adds r0, r5, r3\n\
-    ldr r4, [r0]\n\
-    ldrh r1, [r1, 0x8]\n\
-    cmp r1, r6\n\
-    bhi _08000CF4\n\
-    mov r0, r8\n\
-    adds r0, 0xC\n\
-    adds r0, r5, r0\n\
-    ldr r0, [r0]\n\
-    str r0, [sp]\n\
-    mov r5, sp\n\
-    str r5, [r7]\n\
-    str r4, [r7, 0x4]\n\
-    lsrs r0, r1, 2\n\
-    movs r1, 0x85\n\
-    lsls r1, 24\n\
-    b _08000DAA\n\
-_08000CF4:\n\
-    mov r2, r12\n\
-    ldrb r0, [r2]\n\
-    lsls r0, 4\n\
-    mov r5, r8\n\
-    adds r5, 0xC\n\
-    adds r0, r5\n\
-    ldr r0, [r0]\n\
-    str r0, [sp]\n\
-    ldr r3, =0x040000D4 @REG_DMA3\n\
-    mov r0, sp\n\
-    str r0, [r3]\n\
-    str r4, [r3, 0x4]\n\
-    ldr r0, =0x85000400\n\
-    str r0, [r3, 0x8]\n\
-    ldr r0, [r3, 0x8]\n\
-    adds r4, r6\n\
-    subs r1, r6\n\
-    cmp r1, r6\n\
-    bhi _08000CF4\n\
-    ldrb r0, [r2]\n\
-    lsls r0, 4\n\
-    adds r0, r5\n\
-    ldr r0, [r0]\n\
-    str r0, [sp]\n\
-    mov r2, sp\n\
-    str r2, [r3]\n\
-    str r4, [r3, 0x4]\n\
-    lsrs r0, r1, 2\n\
-    movs r1, 0x85\n\
-    lsls r1, 24\n\
-    b _08000DEA\n\
-    .pool\n\
-_08000D3C:\n\
-    ldr r3, [r1]\n\
-    mov r2, r10\n\
-    adds r0, r5, r2\n\
-    ldr r2, [r0]\n\
-    ldrh r1, [r1, 0x8]\n\
-    cmp r1, r6\n\
-    bhi _08000D56\n\
-    str r3, [r7]\n\
-    str r2, [r7, 0x4]\n\
-    lsrs r0, r1, 1\n\
-    movs r1, 0x80\n\
-    lsls r1, 24\n\
-    b _08000DAA\n\
-_08000D56:\n\
-    ldr r4, =0x040000D4 @REG_DMA3\n\
-    str r3, [r4]\n\
-    str r2, [r4, 0x4]\n\
-    ldr r0, =0x80000800\n\
-    str r0, [r4, 0x8]\n\
-    ldr r0, [r4, 0x8]\n\
-    adds r3, r6\n\
-    adds r2, r6\n\
-    subs r1, r6\n\
-    cmp r1, r6\n\
-    bhi _08000D56\n\
-    str r3, [r4]\n\
-    str r2, [r4, 0x4]\n\
-    lsrs r0, r1, 1\n\
-    movs r1, 0x80\n\
-    lsls r1, 24\n\
-_08000D76:\n\
-    orrs r0, r1\n\
-    str r0, [r4, 0x8]\n\
-    ldr r0, [r4, 0x8]\n\
-    b _08000DF0\n\
-    .pool\n\
-_08000D88:\n\
-    mov r3, r10\n\
-    adds r0, r5, r3\n\
-    ldr r2, [r0]\n\
-    ldrh r4, [r1, 0x8]\n\
-    add r1, sp, 0x4\n\
-    cmp r4, r6\n\
-    bhi _08000DB2\n\
-    mov r0, r8\n\
-    adds r0, 0xC\n\
-    adds r0, r5, r0\n\
-    ldr r0, [r0]\n\
-    strh r0, [r1]\n\
-    str r1, [r7]\n\
-    str r2, [r7, 0x4]\n\
-    lsrs r0, r4, 1\n\
-    movs r1, 0x81\n\
-    lsls r1, 24\n\
-_08000DAA:\n\
-    orrs r0, r1\n\
-    str r0, [r7, 0x8]\n\
-    ldr r0, [r7, 0x8]\n\
-    b _08000DF0\n\
-_08000DB2:\n\
-    mov r5, r12\n\
-    ldrb r0, [r5]\n\
-    lsls r0, 4\n\
-    ldr r3, =gDma3Requests + 0x0C\n\
-    adds r0, r3\n\
-    ldr r0, [r0]\n\
-    strh r0, [r1]\n\
-    ldr r3, =0x040000D4 @REG_DMA3\n\
-    str r1, [r3]\n\
-    str r2, [r3, 0x4]\n\
-    ldr r0, =0x81000800\n\
-    str r0, [r3, 0x8]\n\
-    ldr r0, [r3, 0x8]\n\
-    adds r2, r6\n\
-    subs r4, r6\n\
-    cmp r4, r6\n\
-    bhi _08000DB2\n\
-    ldrb r0, [r5]\n\
-    lsls r0, 4\n\
-    ldr r5, =gDma3Requests + 0x0C\n\
-    adds r0, r5\n\
-    ldr r0, [r0]\n\
-    strh r0, [r1]\n\
-    str r1, [r3]\n\
-    str r2, [r3, 0x4]\n\
-    lsrs r0, r4, 1\n\
-    movs r1, 0x81\n\
-    lsls r1, 24\n\
-_08000DEA:\n\
-    orrs r0, r1\n\
-    str r0, [r3, 0x8]\n\
-    ldr r0, [r3, 0x8]\n\
-_08000DF0:\n\
-    ldr r1, =gDma3Requests\n\
-    mov r3, r12\n\
-    ldrb r0, [r3]\n\
-    lsls r0, 4\n\
-    adds r0, r1\n\
-    mov r2, r9\n\
-    str r2, [r0]\n\
-    ldrb r0, [r3]\n\
-    lsls r0, 4\n\
-    add r0, r10\n\
-    str r2, [r0]\n\
-    ldrb r0, [r3]\n\
-    lsls r0, 4\n\
-    adds r0, r1\n\
-    movs r4, 0\n\
-    strh r2, [r0, 0x8]\n\
-    ldrb r0, [r3]\n\
-    lsls r0, 4\n\
-    adds r0, r1\n\
-    mov r5, r9\n\
-    strh r5, [r0, 0xA]\n\
-    ldrb r0, [r3]\n\
-    lsls r0, 4\n\
-    adds r1, 0xC\n\
-    adds r0, r1\n\
-    mov r1, r9\n\
-    str r1, [r0]\n\
-    ldrb r0, [r3]\n\
-    adds r0, 0x1\n\
-    strb r0, [r3]\n\
-    lsls r0, 24\n\
-    cmp r0, 0\n\
-    bge _08000E34\n\
-    strb r4, [r3]\n\
-_08000E34:\n\
-    mov r2, r12\n\
-    ldrb r0, [r2]\n\
-    lsls r0, 4\n\
-    ldr r3, =gDma3Requests\n\
-    adds r0, r3\n\
-    ldrh r0, [r0, 0x8]\n\
-    cmp r0, 0\n\
-    beq _08000E46\n\
-    b _08000C2E\n\
-_08000E46:\n\
-    add sp, 0xC\n\
-    pop {r3-r5}\n\
-    mov r8, r3\n\
-    mov r9, r4\n\
-    mov r10, r5\n\
-    pop {r4-r7}\n\
-    pop {r0}\n\
-    bx r0\n\
-    .pool\n\
-    .syntax divided");
-}
-#endif
 
 int RequestDma3Copy(const void *src, void *dest, u16 size, u8 mode)
 {