diff --git a/src/kernel/multiboot.h b/src/kernel/multiboot.h
index 059f281..5672812 100644
--- a/src/kernel/multiboot.h
+++ b/src/kernel/multiboot.h
@@ -1,33 +1,272 @@
 #pragma once
 
+/* multiboot.h - Multiboot header file. */
+/* Copyright (C) 1999,2003,2007,2008,2009,2010  Free Software Foundation, Inc.
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to
+ *  deal in the Software without restriction, including without limitation the
+ *  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ *  sell copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL ANY
+ *  DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
 #include "kint.h"
 
-struct multiboot
+/* How many bytes from the start of the file we search for the header. */
+#define MULTIBOOT_SEARCH 8192
+#define MULTIBOOT_HEADER_ALIGN 4
+
+/* The magic field should contain this. */
+#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
+
+/* This should be in %eax. */
+#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
+
+/* Alignment of multiboot modules. */
+#define MULTIBOOT_MOD_ALIGN 0x00001000
+
+/* Alignment of the multiboot info structure. */
+#define MULTIBOOT_INFO_ALIGN 0x00000004
+
+/* Flags set in the ’flags’ member of the multiboot header. */
+
+/* Align all boot modules on i386 page (4KB) boundaries. */
+#define MULTIBOOT_PAGE_ALIGN 0x00000001
+
+/* Must pass memory information to OS. */
+#define MULTIBOOT_MEMORY_INFO 0x00000002
+
+/* Must pass video information to OS. */
+#define MULTIBOOT_VIDEO_MODE 0x00000004
+
+/* This flag indicates the use of the address fields in the header. */
+#define MULTIBOOT_AOUT_KLUDGE 0x00010000
+
+/* Flags to be set in the ’flags’ member of the multiboot info structure. */
+
+/* is there basic lower/upper memory information? */
+#define MULTIBOOT_INFO_MEMORY 0x00000001
+/* is there a boot device set? */
+#define MULTIBOOT_INFO_BOOTDEV 0x00000002
+/* is the command-line defined? */
+#define MULTIBOOT_INFO_CMDLINE 0x00000004
+/* are there modules to do something with? */
+#define MULTIBOOT_INFO_MODS 0x00000008
+
+/* These next two are mutually exclusive */
+
+/* is there a symbol table loaded? */
+#define MULTIBOOT_INFO_AOUT_SYMS 0x00000010
+/* is there an ELF section header table? */
+#define MULTIBOOT_INFO_ELF_SHDR 0X00000020
+
+/* is there a full memory map? */
+#define MULTIBOOT_INFO_MEM_MAP 0x00000040
+
+/* Is there drive info? */
+#define MULTIBOOT_INFO_DRIVE_INFO 0x00000080
+
+/* Is there a config table? */
+#define MULTIBOOT_INFO_CONFIG_TABLE 0x00000100
+
+/* Is there a boot loader name? */
+#define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
+
+/* Is there a APM table? */
+#define MULTIBOOT_INFO_APM_TABLE 0x00000400
+
+/* Is there video information? */
+#define MULTIBOOT_INFO_VBE_INFO 0x00000800
+#define MULTIBOOT_INFO_FRAMEBUFFER_INFO 0x00001000
+
+#ifndef ASM_FILE
+
+struct multiboot_header
 {
+	/* Must be MULTIBOOT_MAGIC - see above. */
+	uint magic;
+
+	/* Feature flags. */
 	uint flags;
-	uint mem_lower;
-	uint mem_upper;
-	uint boot_device;
-	char *cmdline;
-	uint mods_count;
-	uchar **mods_addr;
+
+	/* The above fields plus this one must equal 0 mod 2^32. */
+	uint checksum;
+
+	/* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
+	uint header_addr;
+	uint load_addr;
+	uint load_end_addr;
+	uint bss_end_addr;
+	uint entry_addr;
+
+	/* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
+	uint mode_type;
+	uint width;
+	uint height;
+	uint depth;
+};
+
+/* The symbol table for a.out. */
+struct multiboot_aout_symbol_table
+{
+	uint tabsize;
+	uint strsize;
+	uint addr;
+	uint reserved;
+};
+typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
+
+/* The section header table for ELF. */
+struct multiboot_elf_section_header_table
+{
 	uint num;
 	uint size;
 	uint addr;
 	uint shndx;
+};
+typedef struct multiboot_elf_section_header_table
+	multiboot_elf_section_header_table_t;
+
+struct multiboot_info
+{
+	/* Multiboot info version number */
+	uint flags;
+
+	/* Available memory from BIOS */
+	uint mem_lower;
+	uint mem_upper;
+
+	/* "root" partition */
+	uint boot_device;
+
+	/* Kernel command line */
+	uint cmdline;
+
+	/* Boot-Module list */
+	uint mods_count;
+	uint mods_addr;
+
+	union {
+		multiboot_aout_symbol_table_t aout_sym;
+		multiboot_elf_section_header_table_t elf_sec;
+	} u;
+
+	/* Memory Mapping buffer */
 	uint mmap_length;
 	uint mmap_addr;
+
+	/* Drive Info buffer */
 	uint drives_length;
 	uint drives_addr;
+
+	/* ROM configuration table */
 	uint config_table;
+
+	/* Boot Loader Name */
 	uint boot_loader_name;
+
+	/* APM table */
 	uint apm_table;
+
+	/* Video */
 	uint vbe_control_info;
 	uint vbe_mode_info;
-	uint vbe_mode;
-	uint vbe_interface_seg;
-	uint vbe_interface_off;
-	uint vbe_interface_len;
+	ushort vbe_mode;
+	ushort vbe_interface_seg;
+	ushort vbe_interface_off;
+	ushort vbe_interface_len;
+
+	uint framebuffer_addr_low;
+	uint framebuffer_addr_high;
+	uint framebuffer_pitch;
+	uint framebuffer_width;
+	uint framebuffer_height;
+	uchar framebuffer_bpp;
+#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
+#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
+#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
+	uchar framebuffer_type;
+	union {
+		struct
+		{
+			uint framebuffer_palette_addr;
+			ushort framebuffer_palette_num_colors;
+		};
+		struct
+		{
+			uchar framebuffer_red_field_position;
+			uchar framebuffer_red_mask_size;
+			uchar framebuffer_green_field_position;
+			uchar framebuffer_green_mask_size;
+			uchar framebuffer_blue_field_position;
+			uchar framebuffer_blue_mask_size;
+		};
+	};
+};
+typedef struct multiboot_info multiboot_info_t;
+
+struct multiboot_color
+{
+	uchar red;
+	uchar green;
+	uchar blue;
 };
 
-struct multiboot make_multiboot_physical(struct multiboot *old);
+/*struct multiboot_mmap_entry
+{
+	uint size;
+	multiboot_uint64_t addr;
+	multiboot_uint64_t len;
+#define MULTIBOOT_MEMORY_AVAILABLE 1
+#define MULTIBOOT_MEMORY_RESERVED 2
+#define MULTIBOOT_MEMORY_ACPI_RECLAIMABLE 3
+#define MULTIBOOT_MEMORY_NVS 4
+#define MULTIBOOT_MEMORY_BADRAM 5
+	uint type;
+} __attribute__((packed));
+typedef struct multiboot_mmap_entry multiboot_memory_map_t; */
+
+struct multiboot_mod_list
+{
+	/* the memory used goes from bytes ’mod_start’ to ’mod_end-1’ inclusive */
+	uint mod_start;
+	uint mod_end;
+
+	/* Module command line */
+	uint cmdline;
+
+	/* padding to take it to 16 bytes (must be zero) */
+	uint pad;
+};
+typedef struct multiboot_mod_list multiboot_module_t;
+
+/* APM BIOS info. */
+struct multiboot_apm_info
+{
+	ushort version;
+	ushort cseg;
+	uint offset;
+	ushort cseg_16;
+	ushort dseg;
+	ushort flags;
+	ushort cseg_len;
+	ushort cseg_16_len;
+	ushort dseg_len;
+};
+
+struct multiboot_info make_multiboot_physical(struct multiboot_info *old);
+
+#endif // asm