Unknown

//Lower memory (< 1 Mib)
#define REALMODE_IVT            0x00000000
#define REALMODE_IVT_END        0x000003FF
#define BIOS_DATA_AREA          0x00000400
#define BIOS_DATA_AREA_END      0x000004FF
#define RAM_0                   0x00000500
#define RAM_0_END               0x00007BFF
#define OSBOOTSECTOR            0x00007C00
#define OSBOOTSECTOR_END        0x00007DFF
#define RAM_1                   0x00007E00
#define RAM_1_END               0x0007FFFF
#define RAM_2                   0x00080000
#define RAM_2_END               0x0009FBFF
#define EXTBIOSDATAAREA         0x0009FC00
#define EXTBIOSDATAAREA_END     0x0009FC00
#define ROMAREA                 0x000A0000
#define ROMAREA_END             0x000FFFFF
//Upper memory (> 1 MiB)
#define EXTMEM_0                0x00100000
#define EXTMEM_0_END            0x003FFFFF
#define EXTMEM_1                0x00400000
#define EXTMEM_1_END            0x00EFFFFF
#define ISA_MEMORY_HOLE         0x00F00000
#define ISA_MEMORY_HOLE_END     0x00FFFFFF
#define EXTMEM_2                0x01000000
//Rom Area
#define STACK                   RAM_1_END
#define VGA_FRAMEBUFFER         (ROMAREA + 0x00000000)
#define VGA_TEXTMONOCHROME      (ROMAREA + 0x00010000)
#define VGA_TEXTCOLOR           (ROMAREA + 0x00018000)
#define VIDEO_BIOS              (ROMAREA + 0x00020000)
#define MAPPEDHW_MISC           (ROMAREA + 0x00028000)
#define MOTHERBOARD_BIOS        (ROMAREA + 0x000F0000)
//Usefull
#define KERNELMEM_RMODE         0x00003000
#define KERNELMEM_PMODE         EXTMEM_0
#define KERNELMEM_FUNCSEC       (EXTMEM_0 + 0x00300000)
#define KERNELMEM_DATASEC       (EXTMEM_0 + 0x00340000)
#define KERNELMEM_SYSCALLFUNC   (KERNELMEM_FUNCSEC + 0x00000000)
#define KERNELMEM_ISRHANDLERS   (KERNELMEM_FUNCSEC + 0x00000004)
#define KERNELMEM_SYSCALLTBL    (KERNELMEM_FUNCSEC + 0x00000008)
#define KERNELMEM_ISREXCEPTIONS (KERNELMEM_DATASEC + 0xFFFF0000)
#define KDATA(type, addr) ((type)addr)