MHR-16: see below.

- Use QR-code to redirect to support page inside bootloader.
- Start working on NewLoader, since the PEF linker is done.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>

12 files changed, 318 insertions, 120 deletions

diff --git a/Doxyfile b/Doxyfile
index a52de5be..7fd58842 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -943,7 +943,8 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ./Private/ \
+INPUT                  = ./ \
+                         ./Private/ \
                          ./Public/ \
 
 # This tag can be used to specify the character encoding of the source files
@@ -1159,7 +1160,7 @@ FILTER_SOURCE_PATTERNS =
 # (index.html). This can be useful if you have a project on for instance GitHub
 # and want to reuse the introduction page also for the doxygen output.
 
-USE_MDFILE_AS_MAINPAGE =
+USE_MDFILE_AS_MAINPAGE = ./ReadMe.md
 
 # The Fortran standard specifies that for fixed formatted Fortran code all
 # characters from position 72 are to be considered as comment. A common
diff --git a/Private/Documentation/Spec.md b/Private/Docs/SPECIFICATION.md
index e218947e..e218947e 100644
--- a/Private/Documentation/Spec.md
+++ b/Private/Docs/SPECIFICATION.md
diff --git a/Private/Documentation/Todo.md b/Private/Docs/TODO-LIST.md
index 2c4af6e5..c997ce10 100644
--- a/Private/Documentation/Todo.md
+++ b/Private/Docs/TODO-LIST.md
@@ -1,14 +1,16 @@
+# TODO list.
+
 - We need preemptive multi-threading. [ X ]
 - We then need sync primitives. [ X ]
 - We also need a system library for the OS. [ X ]
 - We need a bootloader for AMD64 [ X ]
-    - Implement Boot Services [ X ]
-    - Design Handover [ X ]
-    - Load kernel into memory [ X ]
-    - Fix bug in kernel loader, which causes a 06 #UD. [ X ]
-    - Load Kernel [ X ]
-    - Add IDT [ X ]
-    - AHCI driver [ WiP ]
+  - Implement Boot Services [ X ]
+  - Design Handover [ X ]
+  - Load kernel into memory [ X ]
+  - Fix bug in kernel loader, which causes a 06 #UD. [ X ]
+  - Load Kernel [ X ]
+  - Add IDT [ X ]
+  - AHCI driver [ WiP ]
 - Context switch x87/SSE/AVX registers [ X ]
 - Framebuffer [ X ]
 - AHCI support [ ]
@@ -17,5 +19,5 @@
 Status:
 
 NewBoot: Need to boot from EPM partition.
+<br>
 NewKernel: New Filesystem in progress.
-
diff --git a/Private/Documentation/kernel-design.drawio b/Private/Documentation/kernel-design.drawio
deleted file mode 100644
index d78ac170..00000000
--- a/Private/Documentation/kernel-design.drawio
+++ /dev/null
@@ -1,70 +0,0 @@
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-  <diagram name="Page-1" id="mxOE_IV8GVOi3fDmlM2_">
-    <mxGraphModel dx="1002" dy="569" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
-      <root>
-        <mxCell id="0" />
-        <mxCell id="1" parent="0" />
-        <mxCell id="dpAw-ApGermXuwIBdtFA-1" value="&lt;h1 style=&quot;margin-top: 0px;&quot;&gt;NewKernel.exe&lt;/h1&gt;&lt;p&gt;The kernel is a C++ app, designed to be scalable, reliable and object oriented.&lt;/p&gt;&lt;p&gt;We&#39;re actually working on the AHCI support for it is scheduled to be done by the end of april.&lt;/p&gt;" style="text;html=1;whiteSpace=wrap;overflow=hidden;rounded=0;" parent="1" vertex="1">
-          <mxGeometry x="40" y="40" width="400" height="120" as="geometry" />
-        </mxCell>
-        <mxCell id="dpAw-ApGermXuwIBdtFA-2" value="MicroKernel" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
-          <mxGeometry x="286" y="450" width="256" height="60" as="geometry" />
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-        <mxCell id="dpAw-ApGermXuwIBdtFA-3" value="System Call Interface" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
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-        <mxCell id="NTNQYUPq4CuizRvDkpOI-7" value="/Manifest.xml&lt;div&gt;/NewOS/&lt;/div&gt;&lt;div&gt;&lt;span style=&quot;white-space: pre;&quot;&gt;&#x9;&lt;/span&gt;- Library.lib/Dll.dll (Subsystem 17)&lt;/div&gt;&lt;div&gt;/Resources/&lt;/div&gt;&lt;div&gt;&lt;br&gt;&lt;/div&gt;&lt;div&gt;&lt;br&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;align=left;" parent="1" vertex="1">
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-        </mxCell>
-        <mxCell id="vm68-OaV5PJmx3jSNiIi-1" value="&lt;h1 style=&quot;margin-top: 0px;&quot;&gt;GraphicsLib.lib (merged with SystemLib)&lt;/h1&gt;&lt;p&gt;Handles input, graphics and sound.&lt;/p&gt;&lt;p&gt;Uses the ODF format to display graphics and sound is handled by XIFF.&lt;/p&gt;" style="text;html=1;whiteSpace=wrap;overflow=hidden;rounded=0;" vertex="1" parent="1">
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-        <mxCell id="vm68-OaV5PJmx3jSNiIi-4" value="System Object" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
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diff --git a/Private/FirmwareKit/EFI/API.hxx b/Private/FirmwareKit/EFI/API.hxx
index 212f3686..0e2ef200 100644
--- a/Private/FirmwareKit/EFI/API.hxx
+++ b/Private/FirmwareKit/EFI/API.hxx
@@ -61,9 +61,11 @@ enum {
 inline UInt32 Platform() noexcept { return kPEMachineAMD64; }
 
 /***
- * @brief Raise Hard kernel error.
+ * @brief Throw an error, stop execution as well.
+ * @param ErrorCode error code to be print.
+ * @param Reason reason to be print.
  */
-inline void RaiseHardError(const EfiCharType *ErrorCode,
+inline void ThrowError(const EfiCharType *ErrorCode,
                            const EfiCharType *Reason) noexcept {
 #ifdef __DEBUG__
   ST->ConOut->OutputString(ST->ConOut, L"\r\n*** STOP ***\r\n");
@@ -88,19 +90,19 @@ inline void RaiseHardError(const EfiCharType *ErrorCode,
 
   /// Show the QR code now.
 
-  constexpr auto ver = 7;
+  constexpr auto ver = 4;
   auto ecc = qr::Ecc::H;
-  auto str = "https://www.mahrouss-logic.com/help";
-  auto len = BStrLen(L"https://www.mahrouss-logic.com/help");
+  auto str = "https://el-mahrouss-logic.com/";
+  auto len = BStrLen(L"https://el-mahrouss-logic.com/");
 
   qr::Qr<ver> encoder;
   qr::QrDelegate encoderDelegate;
 
-  encoder.encode(str, len, ecc, -1);  // Automatic mask.
+  encoder.encode(str, len, ecc, 0); // Manual mask 0
 
   /// tell delegate to draw encoded QR.
-  encoderDelegate.draw<ver>(encoder, (kHandoverHeader->f_GOP.f_Width - encoder.side_size()) / 2,
-      (kHandoverHeader->f_GOP.f_Height - encoder.side_size()) - 20);
+  encoderDelegate.draw<ver>(encoder, (kHandoverHeader->f_GOP.f_Width - encoder.side_size()) - 20,
+      (kHandoverHeader->f_GOP.f_Height - encoder.side_size()) / 2);
 
 #endif  // ifdef __NEWBOOT__
 
diff --git a/Private/NewBoot/BootKit/Vendor/Qr.hxx b/Private/NewBoot/BootKit/Vendor/Qr.hxx
index 7fec429e..ca5eb566 100644
--- a/Private/NewBoot/BootKit/Vendor/Qr.hxx
+++ b/Private/NewBoot/BootKit/Vendor/Qr.hxx
@@ -5,6 +5,9 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <BootKit/Vendor/QrVendor/base.h>
+#include <BootKit/Vendor/QrVendor/bit.h>
+
 #include <BootKit/Vendor/QrPrelude.hxx>
 #include <BootKit/Vendor/Support.hxx>
 #include <Builtins/Toolbox/Toolbox.hxx>
@@ -276,7 +279,7 @@ public:
   void apply_mask(int mask, uint8_t *patterns);
 
  private:
-  static_assert(V <= 40, "invalid version");
+  static_assert(V >= 1 && V <= 40, "invalid version");
   static constexpr int SIDE = 17 + V * 4;
   static constexpr int N_BITS = SIDE * SIDE;
   static constexpr int N_ALIGN = V == 1 ? 0 : V / 7 + 2;
@@ -286,42 +289,29 @@ public:
   static constexpr int N_VER_BITS = V > 6 ? 36 : 0;
   static constexpr int N_DAT_BITS =
       N_BITS - (192 + N_ALIGN_BITS + N_TIMING_BITS + 31 + N_VER_BITS);
-  static constexpr int N_BYTES = N_BITS;  // Actual number of bytes_in_bits
+  static constexpr int N_BYTES = utl::bytes_in_bits(N_BITS);  // Actual number of bytes_in_bits
                                           // required to store whole Qr code
-  static constexpr int N_DAT_BYTES =
-      N_DAT_BITS;  // Actual number of bytes_in_bits required to store
+  static constexpr int N_DAT_BYTES = utl::bytes_in_bits(N_DAT_BITS);  // Actual number of bytes_in_bits required to store
                    // [data + ecc]
   static constexpr int N_DAT_CAPACITY =
       N_DAT_BITS >> 3;  // Capacity of [data + ecc] without remainder bits
  private:
   /// @brief internal function to retrieve bit from a bitset.
-  uint8_t get_arr_bit(uint8_t *arr, uint64_t bit) const {
-    return ((volatile uint8_t *)arr)[bit];
+  uint8_t get_arr_bit(uint8_t *arr, unsigned bit) const {
+    return utl::get_arr_bit(arr, bit);
   }
 
   /// @brief internal function to set bit from a bitset.
-  bool set_arr_bit(uint8_t *arr, uint64_t bit) {
-    if (((volatile uint8_t *)arr)[bit] == 0) {
-      ((volatile uint8_t *)arr)[bit] = 1;
-
-      return true;
-    }
-
-    return false;
+  void set_arr_bit(uint8_t *arr, unsigned bit) {
+    utl::set_arr_bit(arr, bit);
   }
 
   /// @brief internal function to clear bit from a bitset.
-  bool clr_arr_bit(uint8_t *arr, uint64_t bit) {
-    if (((volatile uint8_t *)arr)[bit] == 1) {
-      ((volatile uint8_t *)arr)[bit] = 0;
-
-      return true;
-    }
-
-    return false;
+  void clr_arr_bit(uint8_t *arr, unsigned bit) {
+    utl::clr_arr_bit(arr, bit);
   }
 
-  uint8_t code[N_BITS] = {0};
+  uint8_t code[N_BYTES] = {};
 
   bool status = false;
 };
diff --git a/Private/NewBoot/BootKit/Vendor/QrVendor/base.h b/Private/NewBoot/BootKit/Vendor/QrVendor/base.h
new file mode 100644
index 00000000..d8261d1e
--- /dev/null
+++ b/Private/NewBoot/BootKit/Vendor/QrVendor/base.h
@@ -0,0 +1,25 @@
+#ifndef UTL_BASE_H
+#define UTL_BASE_H
+
+#include <cstdint>
+#include <cstddef>
+#include <cassert>
+
+namespace utl {
+
+/**
+ * @brief Helper to get number of elements in array. 
+ * 
+ * @tparam T Auto-deduced element type
+ * @tparam N Auto-deduced number of elements
+ * @return Array size
+ */
+template<class T, size_t N>
+constexpr size_t countof(T(&)[N]) 
+{ 
+    return N; 
+}
+
+}
+
+#endif
\ No newline at end of file
diff --git a/Private/NewBoot/BootKit/Vendor/QrVendor/bit.h b/Private/NewBoot/BootKit/Vendor/QrVendor/bit.h
new file mode 100644
index 00000000..646151b6
--- /dev/null
+++ b/Private/NewBoot/BootKit/Vendor/QrVendor/bit.h
@@ -0,0 +1,245 @@
+#ifndef UTL_BIT_H
+#define UTL_BIT_H
+
+#include <bit>
+
+namespace utl {
+
+/**
+ * @brief Size of object in terms of bits.
+ *
+ * @tparam T Object type
+ * @return Number of bits
+ */
+template<class T>
+constexpr auto bit_size()
+{
+    return sizeof(T) * 8;
+}
+
+/**
+ * @brief Integer with all bits set to 1.
+ *
+ * @tparam T Integer type
+ * @return All set integer
+ */
+template<class T>
+constexpr T bit_full()
+{
+    return T(-1);
+}
+
+/**
+ * @brief Wrap around mask for power of two number of bits
+ * within given integer type. For example:
+ * [ bit_wrap<uint8_t>  = 8  - 1 = 0b111   ]
+ * [ bit_wrap<uint16_t> = 16 - 1 = 0b1111  ]
+ * [ bit_wrap<uint32_t> = 32 - 1 = 0b11111 ]
+ *
+ * @tparam T Integer type
+ * @return Wrap around mask for number of bits
+ */
+template<class T>
+constexpr T bit_wrap()
+{
+    return bit_size<T>() - 1;
+}
+
+/**
+ * @brief Number of bits to fit bit_wrap<T> result, in other words
+ * bit width of (sizeof(T) * 8 - 1). For example:
+ * [ bit_shft<uint8_t>  = bit_width(0b111)      = 3 ]
+ * [ bit_shft<uint16_t> = bit_width(0b1111)     = 4 ]
+ * [ bit_shft<uint32_t> = bit_width(0b11111)    = 5 ]
+ *
+ * @tparam T Integer type
+ * @return Number of bits to shift to divide by sizeof(T) * 8
+ */
+template<class T>
+constexpr auto bit_shft()
+{
+    return std::bit_width(bit_wrap<T>());
+}
+
+/**
+ * @brief Round up division by number of bits within given integer type,
+ * which sizeof(T) * 8 is power of two.
+ *
+ * @tparam T Inetegr type
+ * @param x Dividend
+ * @return Quotient
+ */
+template<class T>
+constexpr auto bit_ceil(auto x)
+{
+    return (x + bit_wrap<T>()) >> bit_shft<T>();
+}
+
+/**
+ * @brief Count leading zeros.
+ *
+ * @param x Unsigned integer argument
+ * @return Number of leading zeros
+ */
+constexpr unsigned cntlz(auto x)
+{
+    if constexpr (std::is_same_v<decltype(x), int>)
+        return std::countl_zero(unsigned(x));
+    else
+        return std::countl_zero(x);
+}
+
+/**
+ * @brief Count trailing zeros.
+ *
+ * @param x Unsigned integer argument
+ * @return Number of trailing zeros
+ */
+constexpr unsigned cnttz(auto x)
+{
+    if constexpr (std::is_same_v<decltype(x), int>)
+        return std::countr_zero(unsigned(x));
+    else
+        return std::countr_zero(x);
+}
+
+/**
+ * @brief Get number of words (integers) required to store N bits.
+ *
+ * @tparam T Word integer type
+ * @param n Number of bits to store
+ * @return Number of words
+ */
+template<class T>
+constexpr size_t words_in_bits(size_t n)
+{
+    return (n >> bit_shft<T>()) + !!(n & bit_wrap<T>());
+}
+
+/**
+ * @brief Get number of bytes required to store N bits.
+ *
+ * @param n Number of bits to store
+ * @return Number of bytes
+ */
+constexpr size_t bytes_in_bits(size_t n)
+{
+    return words_in_bits<uint8_t>(n);
+}
+
+/**
+ * @brief Make integer with bit at given position.
+ *
+ * @tparam T Inetegr type
+ * @param n Bit position
+ * @return Integer with set bit
+ */
+template<class T = unsigned>
+constexpr T bit(int n)
+{
+    return T(1) << n;
+}
+
+/**
+ * @brief Get n-th bit of an integer.
+ *
+ * @tparam T Integer type
+ * @param x Integer
+ * @param n Bit position from LSB
+ * @return true if set
+ */
+template<class T>
+constexpr bool get_bit(T x, int n)
+{
+    return (x >> n) & 1;
+}
+
+/**
+ * @brief Set n-th bit of an integer.
+ *
+ * @tparam T Integer type
+ * @param x Integer
+ * @param n Bit position from LSB
+ */
+template<class T>
+constexpr void set_bit(T& x, int n)
+{
+    x |= 1 << n;
+}
+
+/**
+ * @brief Clear n-th bit of an integer.
+ *
+ * @tparam T Integer type
+ * @param x Integer
+ * @param n Bit position from LSB
+ */
+template<class T>
+constexpr void clr_bit(T& x, int n)
+{
+    x &= ~(1 << n);
+}
+
+/**
+ * @brief Get n-th bit in array of words (starting from LSB).
+ *
+ * @tparam T Word type
+ * @param p Array of words
+ * @param n Index of bit to get
+ * @return true if set
+ */
+template<class T>
+constexpr bool get_arr_bit(const T* p, unsigned n)
+{
+    return get_bit(p[n >> bit_shft<T>()], n & bit_wrap<T>());
+}
+
+/**
+ * @brief Set n-th bit in array of words (starting from LSB).
+ *
+ * @tparam T Word type
+ * @param p Array of words
+ * @param n Index of bit to set
+ */
+template<class T>
+constexpr void set_arr_bit(T* p, unsigned n)
+{
+    set_bit(p[n >> bit_shft<T>()], n & bit_wrap<T>());
+}
+
+/**
+ * @brief Clear n-th bit in array of words (starting from LSB).
+ *
+ * @tparam T Word type
+ * @param p Array of words
+ * @param n Index of bit to clear
+ */
+template<class T>
+constexpr void clr_arr_bit(T* p, unsigned n)
+{
+    clr_bit(p[n >> bit_shft<T>()], n & bit_wrap<T>());
+}
+
+/**
+ * @brief Shift bits left in array of integer elements from least significant bit
+ * and considering 0-th byte as the right most.
+ * uint16_t example: 0b10000000'11100001 ==> 0b00000001'11000010.
+ *
+ * @tparam T Integer type
+ * @tparam L Length of array
+ * @param x Array of integers, nullptr not acceptable!
+ * @param len Number of elements
+ */
+template<class T, size_t L>
+constexpr void shift_left(T (&x)[L])
+{
+    for (int i = L - 1; i > 0; --i) {
+        x[i] <<= 1;
+        x[i] |= x[i - 1] >> bit_wrap<T>();
+    }
+    x[0] <<= 1;
+}
+
+}
+
+#endif
diff --git a/Private/NewBoot/Source/HEL/AMD64/BootFileReader.cxx b/Private/NewBoot/Source/HEL/AMD64/BootFileReader.cxx
index aab5db1f..0e126ada 100644
--- a/Private/NewBoot/Source/HEL/AMD64/BootFileReader.cxx
+++ b/Private/NewBoot/Source/HEL/AMD64/BootFileReader.cxx
@@ -66,7 +66,7 @@ BFileReader::BFileReader(const CharacterTypeUTF16* path,
 
   if (efp->OpenVolume(efp, &rootFs) != kEfiOk) {
     mWriter.Write(L"New Boot: Fetch-Protocol: No-Such-Volume").Write(L"\r\n");
-    EFI::RaiseHardError(L"NoSuchVolume", L"No Such volume.");
+    EFI::ThrowError(L"NoSuchVolume", L"No Such volume.");
     this->mErrorCode = kNotSupported;
     return;
   }
@@ -78,7 +78,7 @@ BFileReader::BFileReader(const CharacterTypeUTF16* path,
     mWriter.Write(L"New Boot: Fetch-Protocol: No-Such-Path: ")
         .Write(mPath)
         .Write(L"\r\n");
-    EFI::RaiseHardError(L"NoSuchPath", L"No Such file on filesystem.");
+    EFI::ThrowError(L"NoSuchPath", L"No Such file on filesystem.");
     this->mErrorCode = kNotSupported;
     return;
   }
@@ -110,7 +110,7 @@ Void BFileReader::ReadAll(SizeT until, SizeT chunk) {
     if (auto err = BS->AllocatePool(EfiLoaderCode, until, (VoidPtr*)&mBlob) !=
                    kEfiOk) {
       mWriter.Write(L"*** EFI-Code: ").Write(err).Write(L" ***\r\n");
-      EFI::RaiseHardError(L"NewBoot_PageError", L"Allocation error.");
+      EFI::ThrowError(L"NewBoot_PageError", L"Allocation error.");
     }
   }
 
diff --git a/Private/NewBoot/Source/HEL/AMD64/BootMain.cxx b/Private/NewBoot/Source/HEL/AMD64/BootMain.cxx
index d314c949..7120bcd9 100644
--- a/Private/NewBoot/Source/HEL/AMD64/BootMain.cxx
+++ b/Private/NewBoot/Source/HEL/AMD64/BootMain.cxx
@@ -67,7 +67,7 @@ EFI_EXTERN_C EFI_API Int Main(EfiHandlePtr ImageHandle,
 
   if (BS->AllocatePool(EfiLoaderData, sizeof(UInt32), (VoidPtr*)&SizePtr) !=
       kEfiOk) {
-    EFI::RaiseHardError(L"Bad-Alloc", L"New Boot ran out of memory!");
+    EFI::ThrowError(L"Bad-Alloc", L"New Boot ran out of memory!");
   }
 
   /****
@@ -80,7 +80,7 @@ EFI_EXTERN_C EFI_API Int Main(EfiHandlePtr ImageHandle,
 
   if (BS->AllocatePool(EfiLoaderData, sizeof(EfiMemoryDescriptor),
                        (VoidPtr*)&Descriptor) != kEfiOk) {
-    EFI::RaiseHardError(L"Bad-Alloc", L"New Boot ran out of memory!");
+    EFI::ThrowError(L"Bad-Alloc", L"New Boot ran out of memory!");
   }
 
   HEL::HandoverInformationHeader* handoverHdrPtr = nullptr;
@@ -179,14 +179,14 @@ EFI_EXTERN_C EFI_API Int Main(EfiHandlePtr ImageHandle,
         headerKind->Magic[3] == kPefMagic[3] &&
         headerKind->Magic[4] == kPefMagic[4]) {
       if (headerKind->Abi != kPefAbi || headerKind->Cpu != kPefArchAMD64) {
-        EFI::RaiseHardError(L"Bad-Architecture",
+        EFI::ThrowError(L"Bad-Architecture",
                             L"New Boot can't run this architecture.");
       }
 
       NewOS::HEL::BootMainKind main = (NewOS::HEL::BootMainKind) nullptr;
 
       if (!main) {
-        EFI::RaiseHardError(L"Bad-Exec",
+        EFI::ThrowError(L"Bad-Exec",
                             L"New Boot can't recognize this executable.");
       }
 
@@ -200,7 +200,7 @@ EFI_EXTERN_C EFI_API Int Main(EfiHandlePtr ImageHandle,
     }
   }
 
-  EFI::RaiseHardError(L"Invalid-PEF-Executable", L"PEF executable expected. Got something else.");
+  EFI::ThrowError(L"Invalid-PEF-Executable", L"PEF executable expected. Got something else.");
 
   return kEfiFail;
 }
diff --git a/Private/Documentation/.gitkeep b/Private/NewLoader/Source/.gitkeep
index e69de29b..e69de29b 100644
--- a/Private/Documentation/.gitkeep
+++ b/Private/NewLoader/Source/.gitkeep
diff --git a/Private/makefile b/Private/makefile
index 41f70c81..673a4b56 100644
--- a/Private/makefile
+++ b/Private/makefile
@@ -28,10 +28,12 @@ COPY		= cp
 
 # Add assembler, linker, and object files variables.
 ASMFLAGS	= -f win64
+
+# NewOS subsystem is 17.
 LDFLAGS		= -e Main --subsystem=17
 LDOBJ		= Objects/*.obj
 
-# This file is the kernel, responsible of task management, memory, drivers and more.
+# This file is the kernel, responsible of task management and memory.
 KERNEL		= NewKernel.exe
 
 # The kernel entrypoint
@@ -39,6 +41,7 @@ SCRIPT		= --script=Linker/Platforms/PC.lds
 
 .PHONY: error
 error:
+	@echo "=== ERROR ==="
 	@echo "=> Use a specific target."
 
 MOVEALL=./MoveAll.sh