diff --git a/sdk/xtdk/amd64/hlfuncs.h b/sdk/xtdk/amd64/hlfuncs.h
index 2029c81..a86cd35 100644
--- a/sdk/xtdk/amd64/hlfuncs.h
+++ b/sdk/xtdk/amd64/hlfuncs.h
@@ -34,11 +34,29 @@ XTCDECL
 UCHAR
 HlIoPortInByte(IN USHORT Port);
 
+XTCDECL
+UCHAR
+HlIoPortInShort(IN USHORT Port);
+
+XTCDECL
+UCHAR
+HlIoPortInLong(IN USHORT Port);
+
 XTCDECL
 VOID
 HlIoPortOutByte(IN USHORT Port,
                 IN UCHAR Data);
 
+XTCDECL
+VOID
+HlIoPortOutShort(IN USHORT Port,
+                 IN USHORT Value);
+
+XTCDECL
+VOID
+HlIoPortOutLong(IN USHORT Port,
+                IN UINT Value);
+
 XTCDECL
 ULONG_PTR
 HlReadControlRegister(IN USHORT ControlRegister);
diff --git a/sdk/xtdk/i686/hlfuncs.h b/sdk/xtdk/i686/hlfuncs.h
index 25dd59c..b50a543 100644
--- a/sdk/xtdk/i686/hlfuncs.h
+++ b/sdk/xtdk/i686/hlfuncs.h
@@ -34,11 +34,29 @@ XTCDECL
 UCHAR
 HlIoPortInByte(IN USHORT Port);
 
+XTCDECL
+UCHAR
+HlIoPortInShort(IN USHORT Port);
+
+XTCDECL
+UCHAR
+HlIoPortInLong(IN USHORT Port);
+
 XTCDECL
 VOID
 HlIoPortOutByte(IN USHORT Port,
                 IN UCHAR Data);
 
+XTCDECL
+VOID
+HlIoPortOutShort(IN USHORT Port,
+                 IN USHORT Value);
+
+XTCDECL
+VOID
+HlIoPortOutLong(IN USHORT Port,
+                IN UINT Value);
+
 XTCDECL
 ULONG_PTR
 HlReadControlRegister(IN USHORT ControlRegister);
diff --git a/xtoskrnl/hl/amd64/cpufunc.c b/xtoskrnl/hl/amd64/cpufunc.c
index 72626f9..07f611e 100644
--- a/xtoskrnl/hl/amd64/cpufunc.c
+++ b/xtoskrnl/hl/amd64/cpufunc.c
@@ -83,10 +83,10 @@ HlHalt()
 }
 
 /**
- * Reads the data from the specified I/O port.
+ * Reads the 8-bit data from the specified I/O port.
  *
  * @param Port
- *        Specifies the port number in the range of 0-0xFFFF.
+ *        Specifies the address to read from, in the range of 0-0xFFFF.
  *
  * @return The value read from the port.
  *
@@ -104,10 +104,52 @@ HlIoPortInByte(IN USHORT Port)
 }
 
 /**
- * Writes the data to the specified I/O port.
+ * Reads the 16-bit data from the specified I/O port.
  *
  * @param Port
- *        Specifies the port number in the range of 0-0xFFFF.
+ *        Specifies the address to read from, in the range of 0-0xFFFF.
+ *
+ * @return The value read from the port.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+UCHAR
+HlIoPortInShort(IN USHORT Port)
+{
+    UCHAR Value;
+    asm volatile("inw %1, %0"
+                 : "=a"(Value)
+                 : "Nd"(Port));
+    return Value;
+}
+
+/**
+ * Reads the 32-bit data from the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to read from, in the range of 0-0xFFFF.
+ *
+ * @return The value read from the port.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+UCHAR
+HlIoPortInLong(IN USHORT Port)
+{
+    UCHAR Value;
+    asm volatile("inl %1, %0"
+                 : "=a"(Value)
+                 : "Nd"(Port));
+    return Value;
+}
+
+/**
+ * Writes the 8-bit data to the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to write to, in the range of 0-0xFFFF.
  *
  * @param Value
  *        Supplies the value to write.
@@ -127,6 +169,54 @@ HlIoPortOutByte(IN USHORT Port,
                  "Nd"(Port));
 }
 
+/**
+ * Writes the 16-bit data to the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to write to, in the range of 0-0xFFFF.
+ *
+ * @param Value
+ *        Supplies the value to write.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+HlIoPortOutShort(IN USHORT Port,
+                 IN USHORT Value)
+{
+    asm volatile("outw %0, %1"
+                 :
+                 : "a"(Value),
+                 "Nd"(Port));
+}
+
+/**
+ * Writes the 32-bit data to the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to write to, in the range of 0-0xFFFF.
+ *
+ * @param Value
+ *        Supplies the value to write.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+HlIoPortOutLong(IN USHORT Port,
+                IN UINT Value)
+{
+    asm volatile("outl %0, %1"
+                 :
+                 : "a"(Value),
+                 "Nd"(Port));
+}
+
 /**
  * Reads the specified CPU control register and returns its value.
  *
diff --git a/xtoskrnl/hl/i686/cpufunc.c b/xtoskrnl/hl/i686/cpufunc.c
index ebf56ea..b8317ea 100644
--- a/xtoskrnl/hl/i686/cpufunc.c
+++ b/xtoskrnl/hl/i686/cpufunc.c
@@ -83,10 +83,10 @@ HlHalt()
 }
 
 /**
- * Reads the data from the specified I/O port.
+ * Reads the 8-bit data from the specified I/O port.
  *
  * @param Port
- *        Specifies the port number in the range of 0-0xFFFF.
+ *        Specifies the address to read from, in the range of 0-0xFFFF.
  *
  * @return The value read from the port.
  *
@@ -104,10 +104,52 @@ HlIoPortInByte(IN USHORT Port)
 }
 
 /**
- * Writes the data to the specified I/O port.
+ * Reads the 16-bit data from the specified I/O port.
  *
  * @param Port
- *        Specifies the port number in the range of 0-0xFFFF.
+ *        Specifies the address to read from, in the range of 0-0xFFFF.
+ *
+ * @return The value read from the port.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+UCHAR
+HlIoPortInShort(IN USHORT Port)
+{
+    UCHAR Value;
+    asm volatile("inw %1, %0"
+                 : "=a"(Value)
+                 : "Nd"(Port));
+    return Value;
+}
+
+/**
+ * Reads the 32-bit data from the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to read from, in the range of 0-0xFFFF.
+ *
+ * @return The value read from the port.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+UCHAR
+HlIoPortInLong(IN USHORT Port)
+{
+    UCHAR Value;
+    asm volatile("inl %1, %0"
+                 : "=a"(Value)
+                 : "Nd"(Port));
+    return Value;
+}
+
+/**
+ * Writes the 8-bit data to the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to write to, in the range of 0-0xFFFF.
  *
  * @param Value
  *        Supplies the value to write.
@@ -127,6 +169,54 @@ HlIoPortOutByte(IN USHORT Port,
                  "Nd"(Port));
 }
 
+/**
+ * Writes the 16-bit data to the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to write to, in the range of 0-0xFFFF.
+ *
+ * @param Value
+ *        Supplies the value to write.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+HlIoPortOutShort(IN USHORT Port,
+                 IN USHORT Value)
+{
+    asm volatile("outw %0, %1"
+                 :
+                 : "a"(Value),
+                 "Nd"(Port));
+}
+
+/**
+ * Writes the 32-bit data to the specified I/O port.
+ *
+ * @param Port
+ *        Specifies the address to write to, in the range of 0-0xFFFF.
+ *
+ * @param Value
+ *        Supplies the value to write.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+HlIoPortOutLong(IN USHORT Port,
+                IN UINT Value)
+{
+    asm volatile("outl %0, %1"
+                 :
+                 : "a"(Value),
+                 "Nd"(Port));
+}
+
 /**
  * Reads the specified CPU control register and returns its value.
  *