diff --git a/ka/main.k b/ka/main.k
index ba7d567..eb1f473 100644
--- a/ka/main.k
+++ b/ka/main.k
@@ -5,7 +5,10 @@
 ; Main function
 ;
 main:
-    call movzx_test
+    jmp bswap_test
+
+bswap_test:
+    mov rdx, 0xFFEEDDCCBBAA99884433
     ret
 
 ramdev_test:
diff --git a/vm/in/INSTRS b/vm/in/INSTRS
index 0f65246..a5fce07 100644
--- a/vm/in/INSTRS
+++ b/vm/in/INSTRS
@@ -138,6 +138,18 @@ decf rm
 add rm rim
 addf rm rim
 
+#
+# Arithmetical ADD operation, with carry
+#
+#       $1 = $1 + $2 + CF
+#
+# Sets CF if unsigned integer overflow occur, clears it otherwise
+# Sets OF is signed integer overflow occur, clears it otherwise
+# Sets ZF and SF according to the result
+#
+adc rm rim
+adcf rm rim
+
 #
 # Arithmetical SUB operation
 #
@@ -507,6 +519,20 @@ cmc
 clc
 stc
 
+#---------------------------------------------------------------------------#
+# Byte-wise / bit-wise manipulation instructions                            #
+#---------------------------------------------------------------------------#
+
+#
+# Byte/word/dword swap (xSWAP)
+#
+# Changes endianness
+#
+bswap rm rim
+wswap rm rim
+dswap rm rim
+
+
 #---------------------------------------------------------------------------#
 # Misc. instructions                                                        #
 #---------------------------------------------------------------------------#
diff --git a/vm/in/arith.c b/vm/in/arith.c
index 05338a6..67b30e8 100644
--- a/vm/in/arith.c
+++ b/vm/in/arith.c
@@ -93,6 +93,30 @@ IMPL_START_2(addf)
 }
 IMPL_OUT_ZSF;
 
+IMPL_START_2(adc)
+{
+    v1 += v2 + !!(flg&CF);
+}
+IMPL_OUT;
+
+IMPL_START_2(adcf)
+{
+    if (v1 + v2 + !!(flg&CF) < v1) flg |= OF;
+    else flg &= ~OF;
+
+    v1 += !!(flg&CF);
+
+    if ( ((v2 > 0) && (v1 > LONG_MAX - v2))
+      || ((v2 < 0) && (v1 < LONG_MIN - v2)) )
+         flg |= CF;
+    else flg &= ~CF;
+
+    v1 += v2;
+}
+IMPL_OUT_ZSF;
+
+//--------------------------------------------------------------------------
+
 IMPL_START_2(sub)
 {
     v1 -= v2;
diff --git a/vm/in/misc.c b/vm/in/misc.c
new file mode 100644
index 0000000..f4dc08f
--- /dev/null
+++ b/vm/in/misc.c
@@ -0,0 +1,27 @@
+// The OS/K Team licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <in/instrs.h>
+
+IMPL_START_2(bswap)
+{
+    v1 = ((v2 & 0xFF00000000000000) >> 56)
+       | ((v2 & 0x00FF000000000000) >> 40)
+       | ((v2 & 0x0000FF0000000000) >> 24)
+       | ((v2 & 0x000000FF00000000) >> 8)
+       | ((v2 & 0x00000000FF000000) << 8)
+       | ((v2 & 0x0000000000FF0000) << 24)
+       | ((v2 & 0x000000000000FF00) << 40)
+       | ((v2 & 0x00000000000000FF) << 56);
+}
+IMPL_OUT;
+
+IMPL_START_2(wswap)
+{
+}
+IMPL_OUT;
+
+IMPL_START_2(dswap)
+{
+}
+IMPL_OUT;