diff --git a/serial.txt b/serial.txt
new file mode 100644
index 0000000..deea15e
--- /dev/null
+++ b/serial.txt
@@ -0,0 +1,156 @@
+[=3h[=3h[=3hBdsDxe: loading Boot0001 "UEFI QEMU DVD-ROM QM00003 " from PciRoot(0x0)/Pci(0x1,0x1)/Ata(Secondary,Master,0x0)
+BdsDxe: starting Boot0001 "UEFI QEMU DVD-ROM QM00003 " from PciRoot(0x0)/Pci(0x1,0x1)/Ata(Secondary,Master,0x0)
+
+
+This is BadAppleOS and everything is fine!
+
+Key event: scancode=S(0x1B), down=true, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=D(0x23), down=true, repeat=false
+Key event: scancode=D(0x23), down=false, repeat=false
+Key event: scancode=S(0x1B), down=false, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=F(0x2B), down=true, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=I(0x43), down=true, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=I(0x43), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=F(0x2B), down=false, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=W(0x1D), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=W(0x1D), down=false, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=F(0x2B), down=true, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=F(0x2B), down=false, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=W(0x1D), down=true, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=W(0x1D), down=false, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=I(0x43), down=true, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=L(0x4B), down=true, repeat=false
+Key event: scancode=K(0x42), down=true, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=P(0x4D), down=true, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=K(0x42), down=false, repeat=false
+Key event: scancode=I(0x43), down=false, repeat=false
+Key event: scancode=L(0x4B), down=false, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=P(0x4D), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=T(0x2C), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=T(0x2C), down=false, repeat=false
+Key event: scancode=P(0x4D), down=true, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=P(0x4D), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=I(0x43), down=true, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=I(0x43), down=false, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=I(0x43), down=true, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=I(0x43), down=false, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=O(0x44), down=true, repeat=false
+Key event: scancode=I(0x43), down=true, repeat=false
+Key event: scancode=U(0x3C), down=true, repeat=false
+Key event: scancode=U(0x3C), down=false, repeat=false
+Key event: scancode=I(0x43), down=false, repeat=false
+Key event: scancode=O(0x44), down=false, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=I(0x43), down=true, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=K(0x42), down=true, repeat=false
+Key event: scancode=K(0x42), down=false, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=I(0x43), down=false, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=T(0x2C), down=true, repeat=false
+Key event: scancode=T(0x2C), down=false, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=K(0x42), down=true, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=K(0x42), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=K(0x42), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=K(0x42), down=false, repeat=false
+Key event: scancode=E(0x24), down=true, repeat=false
+Key event: scancode=G(0x34), down=false, repeat=false
+Key event: scancode=R(0x2D), down=true, repeat=false
+Key event: scancode=K(0x42), down=true, repeat=false
+Key event: scancode=J(0x3B), down=true, repeat=false
+Key event: scancode=N(0x31), down=false, repeat=false
+Key event: scancode=R(0x2D), down=false, repeat=false
+Key event: scancode=E(0x24), down=false, repeat=false
+Key event: scancode=G(0x34), down=true, repeat=false
+Key event: scancode=N(0x31), down=true, repeat=false
+Key event: scancode=K(0x42), down=false, repeat=false
+Key event: scancode=J(0x3B), down=false, repeat=false
\ No newline at end of file
diff --git a/targets/_any/include/os/tools/printf_helper.hpp b/targets/_any/include/os/tools/printf_helper.hpp
new file mode 100644
index 0000000..b262cf4
--- /dev/null
+++ b/targets/_any/include/os/tools/printf_helper.hpp
@@ -0,0 +1,227 @@
+
+#pragma once
+
+#if !defined(BAD_APPLE_OS_OS_TOOLS_PRINTF_HELPER_HPP_INCLUDED)
+#define BAD_APPLE_OS_OS_TOOLS_PRINTF_HELPER_HPP_INCLUDED
+
+#include <cassert>
+#include <cstdarg>
+#include <cstddef>
+#include <cstdint>
+#include <utility>
+
+#if !defined(BAOS_IPRINTF_FUNC_ATTRIBUTE)
+#define BAOS_IPRINTF_FUNC_ATTRIBUTE
+#endif
+
+namespace baos
+{
+template<typename TPrinter>
+class PrintFHelper
+{
+private:
+    TPrinter mPrinter;
+public:
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    explicit PrintFHelper(TPrinter printer = {}) noexcept : mPrinter(std::move(printer)) {}
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int printInt(long value)
+    {
+        if (value == 0)
+        {
+            mPrinter.putchar('0');
+            return 1;
+        }
+        if (value < 0)
+        {
+            mPrinter.putchar('-');
+            return printInt(-value) + 1;
+        }
+
+        char digits[19]; // 9223372036854775807 has 10 digits
+        char* pos = &digits[0];
+
+        while (value > 0)
+        {
+            *pos = static_cast<char>('0' + (value % 10));
+            value /= 10;
+            ++pos;
+        }
+        for (char* chr = pos - 1; chr >= digits; --chr)
+        {
+            mPrinter.putchar(*chr);
+        }
+        return pos - digits;
+    }
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int printUInt(uint64_t value)
+    {
+        if (value == 0)
+        {
+            mPrinter.putchar('0');
+            return 1;
+        }
+
+        char digits[20]; // 18,446,744,073,709,551,615 has 20 digits
+        char* pos = &digits[0];
+
+        while (value > 0)
+        {
+            *pos = static_cast<char>('0' + (value % 10));
+            value /= 10;
+            ++pos;
+        }
+        for (char* chr = pos - 1; chr >= digits; --chr)
+        {
+            mPrinter.putchar(*chr);
+        }
+        return pos - digits;
+    }
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int printHexInt(uint64_t value)
+    {
+        if (value == 0)
+        {
+            mPrinter.putchar('0');
+            return 1;
+        }
+
+        char digits[16]; // FFFFFFFFFFFFFFFF has 16 digits
+        char* pos = &digits[0];
+
+        while (value > 0)
+        {
+            const uint64_t digit = (value % 16);
+            if (digit < 10)
+            {
+                *pos = static_cast<char>('0' + digit);
+            }
+            else
+            {
+                *pos = static_cast<char>('A' + digit - 10);
+            }
+            value /= 16;
+            ++pos;
+        }
+        for (char* chr = pos - 1; chr >= digits; --chr)
+        {
+            mPrinter.putchar(*chr);
+        }
+        return pos - digits;
+    }
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int printPointer(void* ptr)
+    {
+        return printHexInt(reinterpret_cast<uint64_t>(ptr));
+    }
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int printString(const char* str)
+    {
+        int len = 0;
+        while (*str)
+        {
+            mPrinter.putchar(*str);
+            ++str;
+            ++len;
+        }
+        return static_cast<int>(len);
+    }
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int printByteSize(size_t bytes)
+    {
+        const char* suffixes[] = {
+            "B", "KiB", "MiB", "GiB", "TiB"
+        };
+        int suffixIdx = 0;
+        for (; suffixIdx < sizeof(suffixes) / sizeof(suffixes[0]); ++suffixIdx)
+        {
+            if (bytes < 1024) {
+                break;
+            }
+            bytes /= 1024;
+        }
+        return printUInt(bytes) + printString(suffixes[suffixIdx]);
+    }
+
+    BAOS_IPRINTF_FUNC_ATTRIBUTE
+    int vprintf(const char* format, va_list vlist) noexcept
+    {
+        int result = 0;
+        const char* pos = format;
+        while (*pos != '\0')
+        {
+            if (*pos == '%')
+            {
+                ++pos;
+                switch (*pos)
+                {
+                    case '%':
+                        mPrinter.putchar('%');
+                        ++result;
+                        break;
+                    case '\0':
+                        // TODO: invalid format string, do something
+                        assert(!"Invalid format string, ends with %.");
+                        return -1;
+                    case 'b':
+                        result += printByteSize(va_arg(vlist, size_t));
+                        break;
+                    case 'c':
+                    {
+                        const char chr = static_cast<char>(va_arg(vlist, int));
+                        mPrinter.putchar(chr);
+                        ++result;
+                        break;
+                    }
+                    case 's':
+                        result += printString(va_arg(vlist, const char*));
+                        break;
+                    case 'd':
+                        result += printInt(va_arg(vlist, int));
+                        break;
+                    case 'p':
+                        result += printPointer(va_arg(vlist, void*));
+                        break;
+                    case 'X':
+                        result += printHexInt(va_arg(vlist, unsigned));
+                        break;
+                    case 'l':
+                        ++pos;
+                        switch (*pos)
+                        {
+                            case '\0':
+                                assert(!"Invalid format string, ends with %l.");
+                                return -1;
+                            case 'd':
+                                result += printInt(va_arg(vlist, long));
+                                break;
+                            case 'X':
+                                result += printHexInt(va_arg(vlist, unsigned long));
+                                break;
+                            default:
+                                return -1;
+                        }
+                        break;
+                    default:
+                        assert(!"Invalid format string, unknown format identifier.");
+                        return -1;
+                }
+            } else
+            {
+                mPrinter.putchar(*pos);
+            }
+            ++pos;
+        }
+        ++result;
+        return result;
+    }
+};
+}
+
+#endif // !defined(BAD_APPLE_OS_OS_TOOLS_PRINTF_HELPER_HPP_INCLUDED)
diff --git a/targets/_any/include/stdio.h b/targets/_any/include/stdio.h
index fe7564b..e9c0749 100644
--- a/targets/_any/include/stdio.h
+++ b/targets/_any/include/stdio.h
@@ -5,6 +5,7 @@
 #define BAD_APPLE_OS_STDIO_H_INCLUDED
 
 #include <stdarg.h>
+#include <stddef.h>
 #include "./detail/common.h"
 
 BA_EXTERN_C_BEGIN
@@ -13,6 +14,8 @@ int putchar(int chr) BA_CXX_NOEXCEPT;
 int puts(const char* str) BA_CXX_NOEXCEPT;
 int printf(const char* format, ...) BA_CXX_NOEXCEPT __attribute__((format(printf, 1, 2)));
 int vprintf(const char* format, va_list vlist) BA_CXX_NOEXCEPT;
+int snprintf(char* buffer, size_t bufferSize, const char* format, ...) BA_CXX_NOEXCEPT __attribute__((format(printf, 3, 4)));
+int vsnprintf(char* buffer, size_t bufferSize, const char* format, va_list vlist) BA_CXX_NOEXCEPT;
 
 BA_EXTERN_C_END
 
diff --git a/targets/_any/src/cstdlib/stdio.cpp b/targets/_any/src/cstdlib/stdio.cpp
index 109d101..360dd2b 100644
--- a/targets/_any/src/cstdlib/stdio.cpp
+++ b/targets/_any/src/cstdlib/stdio.cpp
@@ -1,135 +1,43 @@
 
 #include <stdio.h>
 
+#include <algorithm>
 #include <cassert>
 #include <cstring>
+#include <utility>
 #include <stdarg.h>
 #include "os/serial.hpp"
 #include "os/tty.hpp"
+#include "os/tools/printf_helper.hpp"
+
+namespace
+{
+struct RegularPrinter
+{
+    void putchar(int chr) noexcept // NOLINT
+    {
+        ::putchar(chr);
+    }
+};
+
+struct BufferPrinter
+{
+    char* pos = nullptr;
+    char* end = nullptr;
+
+    void putchar(int chr) noexcept // NOLINT
+    {
+        if (pos != end)
+        {
+            *pos = static_cast<char>(chr);
+            ++pos;
+        }
+    }
+};
+}
 
 extern "C"
 {
-namespace
-{
-
-int printInt(long value)
-{
-    if (value == 0)
-    {
-        putchar('0');
-        return 1;
-    }
-    if (value < 0)
-    {
-        putchar('-');
-        return printInt(-value) + 1;
-    }
-
-    char digits[19]; // 9223372036854775807 has 10 digits
-    char* pos = &digits[0];
-
-    while (value > 0)
-    {
-        *pos = static_cast<char>('0' + (value % 10));
-        value /= 10;
-        ++pos;
-    }
-    for (char* chr = pos - 1; chr >= digits; --chr)
-    {
-        putchar(*chr);
-    }
-    return pos - digits;
-}
-
-int printUInt(uint64_t value)
-{
-    if (value == 0)
-    {
-        putchar('0');
-        return 1;
-    }
-
-    char digits[20]; // 18,446,744,073,709,551,615 has 20 digits
-    char* pos = &digits[0];
-
-    while (value > 0)
-    {
-        *pos = static_cast<char>('0' + (value % 10));
-        value /= 10;
-        ++pos;
-    }
-    for (char* chr = pos - 1; chr >= digits; --chr)
-    {
-        putchar(*chr);
-    }
-    return pos - digits;
-}
-
-int printHexInt(uint64_t value)
-{
-    if (value == 0)
-    {
-        putchar('0');
-        return 1;
-    }
-
-    char digits[16]; // FFFFFFFFFFFFFFFF has 16 digits
-    char* pos = &digits[0];
-
-    while (value > 0)
-    {
-        const uint64_t digit = (value % 16);
-        if (digit < 10)
-        {
-            *pos = static_cast<char>('0' + digit);
-        }
-        else
-        {
-            *pos = static_cast<char>('A' + digit - 10);
-        }
-        value /= 16;
-        ++pos;
-    }
-    for (char* chr = pos - 1; chr >= digits; --chr)
-    {
-        putchar(*chr);
-    }
-    return pos - digits;
-}
-
-int printPointer(void* ptr)
-{
-    return printHexInt(reinterpret_cast<uint64_t>(ptr));
-}
-
-int printString(const char* str)
-{
-    const size_t len = std::strlen(str);
-
-    for (size_t idx = 0; idx < len; ++idx)
-    {
-        putchar(str[idx]);
-    }
-    return static_cast<int>(len);
-}
-
-int printByteSize(size_t bytes)
-{
-    const char* suffixes[] = {
-        "B", "KiB", "MiB", "GiB", "TiB"
-    };
-    int suffixIdx = 0;
-    for (; suffixIdx < sizeof(suffixes) / sizeof(suffixes[0]); ++suffixIdx)
-    {
-        if (bytes < 1024) {
-            break;
-        }
-        bytes /= 1024;
-    }
-    return printUInt(bytes) + printString(suffixes[suffixIdx]);
-}
-}
-
 int putchar(int chr) noexcept
 {
     tty::putChar(static_cast<char>(chr));
@@ -167,74 +75,30 @@ int printf(const char* format, ...) noexcept
 
 int vprintf(const char* format, va_list vlist) BA_CXX_NOEXCEPT
 {
-    int result = 0;
-    const char* pos = format;
-    while (*pos != '\0')
-    {
-        if (*pos == '%')
-        {
-            ++pos;
-            switch (*pos)
-            {
-                case '%':
-                    putchar('%');
-                    ++result;
-                    break;
-                case '\0':
-                    // TODO: invalid format string, do something
-                    assert(!"Invalid format string, ends with %.");
-                    return -1;
-                case 'b':
-                    result += printByteSize(va_arg(vlist, size_t));
-                    break;
-                case 'c':
-                {
-                    const char chr = static_cast<char>(va_arg(vlist, int));
-                    putchar(chr);
-                    ++result;
-                    break;
-                }
-                case 's':
-                    result += printString(va_arg(vlist, const char*));
-                    break;
-                case 'd':
-                    result += printInt(va_arg(vlist, int));
-                    break;
-                case 'p':
-                    result += printPointer(va_arg(vlist, void*));
-                    break;
-                case 'X':
-                    result += printHexInt(va_arg(vlist, unsigned));
-                    break;
-                case 'l':
-                    ++pos;
-                    switch (*pos)
-                    {
-                        case '\0':
-                            assert(!"Invalid format string, ends with %l.");
-                            return -1;
-                        case 'd':
-                            result += printInt(va_arg(vlist, long));
-                            break;
-                        case 'X':
-                            result += printHexInt(va_arg(vlist, unsigned long));
-                            break;
-                        default:
-                            return -1;
-                    }
-                    break;
-                default:
-                    assert(!"Invalid format string, unknown format identifier.");
-                    return -1;
-            }
-        } else
-        {
-            putchar(*pos);
-        }
-        ++pos;
-    }
-    ++result;
+    return baos::PrintFHelper<RegularPrinter>().vprintf(format, vlist);
+}
+
+int snprintf(char* buffer, size_t bufferSize, const char* format, ...) noexcept
+{
+    va_list parameters;
+    va_start(parameters, format);
+    const int result = vsnprintf(buffer, bufferSize, format, parameters);
+    va_end(parameters);
     return result;
 }
+
+int vsnprintf(char* buffer, size_t bufferSize, const char* format, va_list vlist) noexcept
+{
+    BufferPrinter printer{
+        .pos = buffer,
+        .end = bufferSize > 0 ? buffer + bufferSize - 1 : buffer
+    };
+    const int length = baos::PrintFHelper(printer).vprintf(format, vlist);
+    if (bufferSize > 0)
+    {
+        buffer[std::min(static_cast<int>(bufferSize - 1), length)] = '\0';
+    }
+    return length;
+}
 } // extern "C"
 
diff --git a/targets/_any/src/os/interrupt.cpp b/targets/_any/src/os/interrupt.cpp
index 1c7c6a2..ebc8dad 100644
--- a/targets/_any/src/os/interrupt.cpp
+++ b/targets/_any/src/os/interrupt.cpp
@@ -1,17 +1,49 @@
 
+#define BAOS_IPRINTF_FUNC_ATTRIBUTE __attribute__((no_caller_saved_registers))
+#include "os/tools/printf_helper.hpp"
+
 #include "os/interrupt.hpp"
+
+#include <cstdarg>
 #include "os/serial.hpp"
-#include "os/tty.hpp"
 
 namespace baos
 {
+namespace
+{
+struct InterruptPrinter
+{
+    __attribute__((no_caller_saved_registers))
+    void putchar(char chr) noexcept // NOLINT
+    {
+        if (chr == '\n') {
+            writePortByte(PORT_COM1, '\r');
+        }
+        writePortByte(PORT_COM1, static_cast<std::uint8_t>(chr));
+    }
+};
+
+__attribute__((no_caller_saved_registers, format(printf, 1, 2)))
+void iprintf(const char* format, ...) noexcept
+{
+    std::va_list parameters;
+    va_start(parameters, format);
+    PrintFHelper<InterruptPrinter>().vprintf(format, parameters);
+    va_end(parameters);
+}
+}
+
 extern "C" [[noreturn]] void __halt();
 
 __attribute__((no_caller_saved_registers))
 void handleException(const char* name, InterruptFrame* interruptFrame) noexcept
 {
-    tty::write(name);
-    serialWriteString(PORT_COM1, name);
+    iprintf("Exception occurred: %s\n", name);
+    iprintf("IP: 0x%lX\n", interruptFrame->ip);
+    iprintf("CS: 0x%lX\n", interruptFrame->cs);
+    iprintf("FLAGS: 0x%lX\n", interruptFrame->flags);
+    iprintf("SP: 0x%lX\n", interruptFrame->sp);
+    iprintf("SS: 0x%lX\n", interruptFrame->ss);
     __halt();
 }
 
diff --git a/targets/x86_64/src/kernel/startup.cpp b/targets/x86_64/src/kernel/startup.cpp
index dc57f6a..4219e56 100644
--- a/targets/x86_64/src/kernel/startup.cpp
+++ b/targets/x86_64/src/kernel/startup.cpp
@@ -240,6 +240,10 @@ void kernel_main()
             event.down ? "true" : "false",
             event.repeat ? "true" : "false"
         );
+        if (event.down && event.scancode == ps2::Scancode::ESCAPE)
+        {
+            int x = 1 / 0;
+        }
     }
 
     main();