J'ai mis du temps à en trouver une de Memory Map de PC :
http://www.mega-tokyo.com/osfaq2/index.php/How%20do%20I%20determine%20the%20amount%20of%20RAM%3F
On note trois trous libres :
Vu sur le forum mega-tokyo, modifié par rapport à ChuOS x86 actuel :
0x0 0000 0000 to 0x0 0000 04FF - 1 280 o - BIOS Data Area 0x0 0000 0500 to 0x0 0000 7BFF - 30 464 o - Usable RAM 0x0 0000 7C00 to 0x0 0000 7FFF - 1024 o - ChuOS boot loader 0x0 0000 8000 to 0x0 0000 FFFF - 32 Ko - Usable RAM 0x0 0001 0000 to 0x0 0009 F2FF - 589312 o - ChuOS kernel - Usable RAM 0x0 0009 F300 to 0x0 0009 FFFF - 3 328 o - Extended BIOS Data Area 0x0 000A 0000 to 0x0 000B FFFF - 128 Ko - Video display memory mapping 0x0 000A 0000 to 0x0 000B FFFF - SMM state save area (under the video display memory) 0x0 000C 0000 to 0x0 000C FFFF - 64 Ko - Video ROM 0x0 000D 0000 to 0x0 000D 7FFF - 32 Ko - SCSI ROM 0x0 000D 8000 to 0x0 000D FFFF - 32 Ko - Usable RAM 0x0 000E 0000 to 0x0 000F FFFF - 128 Ko - BIOS ROM 0x0 0010 0000 to 0x0 00EF FFFF - 14 Mo - Usable RAM 0x0 00F0 0000 to 0x0 00FF FFFF - 1 Mo - Hole for memory mapped ISA devices 0x0 0100 0000 to 0x0 1FFF C7FF - 495 Mo - Usable RAM 0x0 1FFF C800 to 0x0 1FFF CFFF - 2 Ko - ACPI non-volatile space 0x0 1FFF E000 to 0x0 1FFF FFFF - 8 Ko - ACPI reclaimable space 0x0 2000 0000 to 0x0 3FFF FFFF - 512 Mo - Usable RAM 0x0 4000 0000 to 0x0 7FFF FFFF - 1 Go - Faulty RAM 0x0 8000 0000 to 0x0 BFFF FFFF - 1 Go - Usable RAM 0x0 C000 0000 to 0x0 FEBF FFFF - 1004 Mo - Hole for memory mapped PCI devices 0x0 FEC0 0000 to 0x0 FEC0 0FFF - I/O APIC 0x0 FEC0 1000 to 0x0 FECF FFFF - Reserved for I/O APICs 0x0 FED0 0000 to 0x0 FEEF FFFF - Unused (potential HPET area?) 0x0 FEE0 0000 to 0x0 FEE0 0FFF - Local APIC 0x0 FEE0 1000 to 0x0 FEFF FFFF - Reserved for local APICs 0x0 FF00 0000 to 0x0 FFCF FFFF - Reserved for BIOS ROM 0x0 FFD0 0000 to 0x0 FFFF FFFF - The actual BIOS ROM 0x1 0000 0000 to 0x1 3FFF FFFF - Usable RAM 0x1 4000 0000 to 0x3 FFFF FFFF - Unused (empty) 0x4 0000 0000 to 0x4 3FFF FFFF - Hot plug RAM area 1 (unused) 0x4 4000 0000 to 0x4 7FFF FFFF - Hot plug RAM area 2 (unused) 0x4 8000 0000 to 0x4 BFFF FFFF - Hot plug RAM area 3 (unused) 0x4 C000 0000 to 0x4 FFFF FFFF - Hot plug RAM area 4 (unused) 0x5 0000 0000 to 0xF FFFF FFFF - Unused (empty)