Magic Numbers Shirt Generator

Click on one of the magic numbers below to print it on the shirt.

0x0000000FF1CE

0x0000000FF1CE ("office") is used as the last part of product codes (guid) for Microsoft Office components (visible in registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall registry key).

0x00BAB10C

0x00BAB10C ("über (ooba) block") is used as the magic number for the ZFS uberblock.

0x8BADF00D

0x8BADF00D ("ate bad food") is used by Apple in iOS crash reports, when an application takes too long to launch, terminate, or respond to system events.

0x1BADB002

0x1BADB002 ("1 bad boot" ) Multiboot header magic number.

0x1CEB00DA

0x1CEB00DA ("ice buddha") was used as the origin for the binary file parser IceBuddha.

0xB105F00D

0xB105F00D ("BIOS food") is the value of the low bytes of last four registers on ARM PrimeCell compatible components (the component_id registers), used to identify correct behaviour of a memory-mapped component.

0xB16B00B5

0xB16B00B5 ("big boobs") was required by Microsoft's Hyper-V hypervisor to be used by Linux guests as their "guest signature". One proposal suggested changing it to 0x0DEFACED ("defaced"). Actually, it was initially changed to decimal and then replaced entirely.

0xBAADF00D

0xBAADF00D ("bad food") is used by Microsoft's LocalAlloc(LMEM_FIXED) to indicate uninitialised allocated heap memory when the debug heap is used.

0xBADDCAFE

0xBADDCAFE ("bad cafe") is used by Libumem to indicate uninitialized memory area

0xCAFEBABE

0xCAFEBABE ("cafe babe") is used by Mach-O to identify Universal object files, and by the Java programming language to identify Java bytecode class files. It was originally created by NeXTSTEP developers as a reference to the baristas at Peet's Coffee & Tea.

0xCAFED00D

0xCAFED00D ("cafe dude") is used by Java as a magic number for their pack200 compression.

0xCEFAEDFE

0xCEFAEDFE ("face feed") is used by Mach-O to identify flat (single architecture) object files. In little endian this reads FEEDFACE, "Feed Face".

0xD15EA5E

0xD15EA5E ("disease") is a flag that indicates regular boot on the Nintendo GameCube and Wii consoles.

0xDABBAD00

0xDABBAD00 ("dabba doo") is the name of a blog on computer security.

0xDEADBAAD

0xDEADBAAD ("dead bad") is used by the Android libc abort() function when native heap corruption is detected.

0xDEADBABE

0xDEADBABE ("Dead Babe") is used by IBM Jikes RVM as a sanity check of the stack of the primary thread.

0xDEADBEAF

0xDEADBEAF ("dead beaf") is part of the signature code of Jazz Jackrabbit 2 tileset files. Level files have less room for their signatures and use 0xBABE ("babe") instead. It is also the header of campaign gamesaves used in the Halo Game Series.

0xDEADBEEF

0xDEADBEEF ("dead beef") is frequently used to indicate a software crash or deadlock in embedded systems. DEADBEEF was originally used to mark newly allocated areas of memory that had not yet been initialized—when scanning a memory dump, it is easy to see the DEADBEEF. It is used by IBM RS/6000 systems, Mac OS on 32-bit PowerPC processors and the Commodore Amiga as a magic debug value. On Sun Microsystems' Solaris, it marks freed kernel memory. On OpenVMS running on Alpha processors, DEAD_BEEF can be seen by pressing CTRL-T. The DEC Alpha SRM console has a background process that traps memory errors, identified by PS as "BeefEater waiting on 0xdeadbeef".

0xDEADC0DE

0xDEADC0DE ("dead code") is used as a marker in OpenWrt firmware to signify the beginning of the to-be created jffs2 filesystem at the end of the static firmware.

0xDEADDEAD

0xDEADDEAD ("dead dead") is the bug check (STOP) code displayed when invoking a Blue Screen of Death either by telling the kernel via the attached debugger, or by using a special keystroke combination. This is usually seen by driver developers, as it is used to get a memory dump on Windows NT based systems. An alternative to 0xDEADDEAD is the bug check code 0x000000E2, as they are both called MANUALLY_INITIATED_CRASH as seen on the Microsoft Developer Network.

0xDEADD00D

0xDEADD00D ("dead dude") is used by Android in the Dalvik virtual machine to indicate a VM abort.

0xDEADFA11

0xDEADFA11 ("dead fall") is used by Apple in iOS crash reports, when the user force quits an application.

0xDEAD10CC

0xDEAD10CC ("dead lock") is used by Apple in iOS crash reports, when application holds on to a system resource while running in the background.

0xDEADFEED

0xDEADFEED ("dead feed") is used by Apple in iOS crash reports, when a timeout occurs spawning a service

0xDEFEC8ED

0xDEFEC8ED ("defecated") is the magic number for OpenSolaris core dumps.

0xE011CFD0

0xE011CFD0 is used as a magic number for Microsoft Office files. In little endian this reads D0CF11E0, "docfile0".

0xFACEFEED

0xFACEFEED ("face feed") is used by Alpha servers running Windows NT. The Alpha Hardware Abstraction Layer (HAL) generates this error when it encounters a hardware failure.

0xFBADBEEF

0xFBADBEEF ("bad beef") is used in the WebKit and Blink layout engines to indicate a known, unrecoverable error such as out of memory.

0xFEE1DEAD

0xFEE1DEAD ("feel dead") is used as a magic number in the Linux reboot system call.

0x4B1D

0x4B1D ("Forbid'den'") was a password in some calibration consoles for developers to peer deeper into control registers outside the normal calibration memory range.

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Computer programmers have a special sense of humor that is often manifested in source code. One example of this kind of humor are magic numbers that can be read as hexspeak words like the ones above. Magic numbers like these are often used as debug values in computer processors and operating systems.

Information on these magic numbers is from the Wikipedia article about Hexspeak.




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