diff --git a/arm.dec b/arm.dec
new file mode 100644
index 0000000..dfe1c3a
--- /dev/null
+++ b/arm.dec
@@ -0,0 +1,32 @@
+// ARM call transform - decode
+enum {BLOCK=0x10000};
+char blk[BLOCK]={};
+int min(int a, int b) {return a<b?a:b;}
+
+int decode(int info,int len) {
+    int  offset, i,j,op;
+    int size,bytesRead;
+    size=0;
+    for ( j=0; j<len; j=j+BLOCK) {
+         size=min((len-j), BLOCK);
+         bytesRead=read(blk, size);
+        if (bytesRead!=size) exit(-1);// read error
+        for ( i=0; i<bytesRead-3; i=i+4) {
+            op=blk[i]|(blk[i+1]<<8)|(blk[i+2]<<16)|(blk[i+3]<<24);
+            if ((op>>26)==0x25  ) {
+                offset=op&0x3FFFFFF;
+                offset=offset-(i/4);
+                op=op&(~0x3FFFFFF);
+                op=op|(offset&0x3FFFFFF);
+            }
+           blk[i]=op;
+            blk[i+1]=op>>8;
+            blk[i+2]=op>>16;
+            blk[i+3]=op>>24;
+        }
+        write(blk,bytesRead);
+    }
+    return len;
+}
+int main() {
+}
\ No newline at end of file
diff --git a/arm.det b/arm.det
index 32f5786..31ea2be 100644
--- a/arm.det
+++ b/arm.det
@@ -59,7 +59,7 @@ int detect(int c4,int i) {
         if (type==DEFAULT && ARMcount>=18 && ARMpos>16){
             type=ARM;
             state=START;
-            jstart=ARMpos-5;
+            jstart=ARMpos-(ARMpos%4);
             //printf("DETECT: ARM start %d\n",jstart);
             return state;
         }
diff --git a/arm.enc b/arm.enc
new file mode 100644
index 0000000..8221048
--- /dev/null
+++ b/arm.enc
@@ -0,0 +1,32 @@
+// ARM call transform - encode
+enum {BLOCK=0x10000};
+char blk[BLOCK]={};
+int min(int a, int b) {return a<b?a:b;}
+
+int encode(int info,int len) {
+    int offset,size,bytesRead;
+    int i,op,j;
+    // Transform
+    for  (j=0; j<len; j=j+BLOCK)  {
+        size=min((len-j), BLOCK);
+        bytesRead=read(blk, size);
+        if (bytesRead!=size) exit(-1);
+        for (i=0; i<bytesRead-3; i=i+4) {
+            op=blk[i]|(blk[i+1]<<8)|(blk[i+2]<<16)|(blk[i+3]<<24);//op=blk[i+3]|(blk[i+2]<<8)|(blk[i+1]<<16)|(blk[i]<<24);
+            if ((op>>26)==0x25) {
+                offset=op&0x3FFFFFF;
+                offset=offset+(i/4);
+                op=op&(~0x3FFFFFF);
+                op=op|(offset&0x3FFFFFF);
+            }
+            blk[i]=op;
+            blk[i+1]=op>>8;
+            blk[i+2]=op>>16;
+            blk[i+3]=op>>24;
+        }
+        write(blk,bytesRead);
+    }
+}
+
+int main() {
+}
\ No newline at end of file
diff --git a/conf.pxv b/conf.pxv
index aa0765a..b74450d 100644
--- a/conf.pxv
+++ b/conf.pxv
@@ -67,8 +67,8 @@ encode text.enc
 compress 0
 type 8
 detect dec.det
-decode -1 //dec.dec
-encode -1 //dec.enc
+decode dec.dec
+encode dec.enc
 compress 0
 type 9
 detect gif.det
@@ -77,6 +77,6 @@ encode -1
 compress 0
 type 10
 detect arm.det
-decode -1 //arm.dec
-encode -1 //arm.enc
+decode arm.dec
+encode arm.enc
 compress 0
\ No newline at end of file