diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f55093..e671d8a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -152,8 +152,6 @@ target_sources(${EXECUTABLE_NAME} PUBLIC
     "src/memory.h"
     "src/message.cc"
     "src/message.h"
-    "src/mmx.cc"
-    "src/mmx.h"
     "src/mouse_manager.cc"
     "src/mouse_manager.h"
     "src/mouse.cc"
diff --git a/src/draw.cc b/src/draw.cc
index 592273f..674b0ac 100644
--- a/src/draw.cc
+++ b/src/draw.cc
@@ -3,7 +3,6 @@
 #include <string.h>
 
 #include "color.h"
-#include "mmx.h"
 #include "svga.h"
 
 namespace fallout {
@@ -208,13 +207,13 @@ void blitBufferToBufferStretchTrans(unsigned char* src, int srcWidth, int srcHei
 // 0x4D36D4
 void blitBufferToBuffer(unsigned char* src, int width, int height, int srcPitch, unsigned char* dest, int destPitch)
 {
-    mmxBlit(dest, destPitch, src, srcPitch, width, height);
+    srcCopy(dest, destPitch, src, srcPitch, width, height);
 }
 
 // 0x4D3704
 void blitBufferToBufferTrans(unsigned char* src, int width, int height, int srcPitch, unsigned char* dest, int destPitch)
 {
-    mmxBlitTrans(dest, destPitch, src, srcPitch, width, height);
+    transSrcCopy(dest, destPitch, src, srcPitch, width, height);
 }
 
 // 0x4D387C
@@ -311,4 +310,33 @@ void bufferOutline(unsigned char* buf, int width, int height, int pitch, int col
     }
 }
 
+// 0x4E0DB0
+void srcCopy(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height)
+{
+    for (int y = 0; y < height; y++) {
+        memcpy(dest, src, width);
+        dest += destPitch;
+        src += srcPitch;
+    }
+}
+
+// 0x4E0ED5
+void transSrcCopy(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height)
+{
+    int destSkip = destPitch - width;
+    int srcSkip = srcPitch - width;
+
+    for (int y = 0; y < height; y++) {
+        for (int x = 0; x < width; x++) {
+            unsigned char c = *src++;
+            if (c != 0) {
+                *dest = c;
+            }
+            dest++;
+        }
+        src += srcSkip;
+        dest += destSkip;
+    }
+}
+
 } // namespace fallout
diff --git a/src/draw.h b/src/draw.h
index 49d068b..47601c0 100644
--- a/src/draw.h
+++ b/src/draw.h
@@ -15,6 +15,8 @@ void _buf_texture(unsigned char* buf, int width, int height, int pitch, void* a5
 void _lighten_buf(unsigned char* buf, int width, int height, int pitch);
 void _swap_color_buf(unsigned char* buf, int width, int height, int pitch, int color1, int color2);
 void bufferOutline(unsigned char* buf, int width, int height, int pitch, int a5);
+void srcCopy(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height);
+void transSrcCopy(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height);
 
 } // namespace fallout
 
diff --git a/src/mmx.cc b/src/mmx.cc
deleted file mode 100644
index 8a5b4d1..0000000
--- a/src/mmx.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-#include "mmx.h"
-
-#include <string.h>
-
-#include "svga.h"
-
-namespace fallout {
-
-// Return `true` if CPU supports MMX.
-//
-// 0x4E08A0
-bool mmxIsSupported()
-{
-    return SDL_HasMMX() == SDL_TRUE;
-}
-
-// 0x4E0DB0
-void mmxBlit(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height)
-{
-    if (gMmxEnabled) {
-        // TODO: Blit with MMX.
-        gMmxEnabled = false;
-        mmxBlit(dest, destPitch, src, srcPitch, width, height);
-        gMmxEnabled = true;
-    } else {
-        for (int y = 0; y < height; y++) {
-            memcpy(dest, src, width);
-            dest += destPitch;
-            src += srcPitch;
-        }
-    }
-}
-
-// 0x4E0ED5
-void mmxBlitTrans(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height)
-{
-    if (gMmxEnabled) {
-        // TODO: Blit with MMX.
-        gMmxEnabled = false;
-        mmxBlitTrans(dest, destPitch, src, srcPitch, width, height);
-        gMmxEnabled = true;
-    } else {
-        int destSkip = destPitch - width;
-        int srcSkip = srcPitch - width;
-
-        for (int y = 0; y < height; y++) {
-            for (int x = 0; x < width; x++) {
-                unsigned char c = *src++;
-                if (c != 0) {
-                    *dest = c;
-                }
-                dest++;
-            }
-            src += srcSkip;
-            dest += destSkip;
-        }
-    }
-}
-
-} // namespace fallout
diff --git a/src/mmx.h b/src/mmx.h
deleted file mode 100644
index 051397b..0000000
--- a/src/mmx.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef MMX_H
-#define MMX_H
-
-namespace fallout {
-
-bool mmxIsSupported();
-void mmxBlit(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height);
-void mmxBlitTrans(unsigned char* dest, int destPitch, unsigned char* src, int srcPitch, int width, int height);
-
-} // namespace fallout
-
-#endif /* MMX_H */
diff --git a/src/svga.cc b/src/svga.cc
index bdcc9b1..e361fea 100644
--- a/src/svga.cc
+++ b/src/svga.cc
@@ -9,7 +9,6 @@
 #include "draw.h"
 #include "interface.h"
 #include "memory.h"
-#include "mmx.h"
 #include "mouse.h"
 #include "win32.h"
 #include "window_manager.h"
@@ -20,9 +19,6 @@ namespace fallout {
 static bool createRenderer(int width, int height);
 static void destroyRenderer();
 
-// 0x51E2C8
-bool gMmxEnabled = true;
-
 // screen rect
 Rect _scr_size;
 
@@ -41,25 +37,6 @@ SDL_Surface* gSdlTextureSurface = NULL;
 // TODO: Remove once migration to update-render cycle is completed.
 FpsLimiter sharedFpsLimiter;
 
-// 0x4CACD0
-void mmxSetEnabled(bool a1)
-{
-    // 0x51E2CC
-    static bool probed = false;
-
-    // 0x6ACA20
-    static bool supported;
-
-    if (!probed) {
-        supported = mmxIsSupported();
-        probed = true;
-    }
-
-    if (supported) {
-        gMmxEnabled = a1;
-    }
-}
-
 // 0x4CAD08
 int _init_mode_320_200()
 {
@@ -165,8 +142,6 @@ int _GNW95_init_mode_ex(int width, int height, int bpp)
     _scr_size.right = width - 1;
     _scr_size.bottom = height - 1;
 
-    mmxSetEnabled(true);
-
     _mouse_blit_trans = NULL;
     _scr_blit = _GNW95_ShowRect;
     _zero_mem = _GNW95_zero_vid_mem;
diff --git a/src/svga.h b/src/svga.h
index 1de0d0a..510d724 100644
--- a/src/svga.h
+++ b/src/svga.h
@@ -8,8 +8,6 @@
 
 namespace fallout {
 
-extern bool gMmxEnabled;
-
 extern Rect _scr_size;
 extern void (*_scr_blit)(unsigned char* src, int src_pitch, int a3, int src_x, int src_y, int src_width, int src_height, int dest_x, int dest_y);
 extern void (*_zero_mem)();
@@ -21,7 +19,6 @@ extern SDL_Texture* gSdlTexture;
 extern SDL_Surface* gSdlTextureSurface;
 extern FpsLimiter sharedFpsLimiter;
 
-void mmxSetEnabled(bool a1);
 int _init_mode_320_200();
 int _init_mode_320_400();
 int _init_mode_640_480_16();