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  2. 64-bit computing - Wikipedia

    en.wikipedia.org/wiki/64-bit_computing

    However, most 32-bit applications will work well. 64-bit users are forced to install a virtual machine of a 16- or 32-bit operating system to run 16-bit applications or use one of the alternatives for NTVDM. [40] Mac OS X 10.4 "Tiger" and Mac OS X 10.5 "Leopard" had only a 32-bit kernel, but they can run 64-bit user-mode code on 64-bit processors.

  3. z/Architecture - Wikipedia

    en.wikipedia.org/wiki/Z/Architecture

    The IBM z13 is the last z Systems server to support running an operating system in ESA/390 architecture mode. [2] However, all 24-bit and 31-bit problem-state application programs originally written to run on the ESA/390 architecture will be unaffected by this change.

  4. Position-independent code - Wikipedia

    en.wikipedia.org/wiki/Position-independent_code

    Such instructions require less memory because they do not have to hold a full 24, 31, 32, or 64 bit address (4 or 8 bytes), but instead a base register number (encoded in 4 bits) and a 12–bit address offset (encoded in 12 bits), requiring only two bytes. This programming technique is standard on IBM S/360 type systems.

  5. Logical block addressing - Wikipedia

    en.wikipedia.org/wiki/Logical_block_addressing

    In logical block addressing, only one number is used to address data, and each linear base address describes a single block. The LBA scheme replaces earlier schemes which exposed the physical details of the storage device to the software of the operating system. Chief among these was the cylinder-head-sector (CHS) scheme, where blocks were addressed by means

  6. ONTAP - Wikipedia

    en.wikipedia.org/wiki/ONTAP

    ONTAP, Data ONTAP, Clustered Data ONTAP (cDOT), or Data ONTAP 7-Mode is NetApp's proprietary operating system used in storage disk arrays such as NetApp FAS and AFF, ONTAP Select, and Cloud Volumes ONTAP. With the release of version 9.0, NetApp decided to simplify the Data ONTAP name and removed the word "Data" from it, removed the 7-Mode image ...

  7. x86 memory segmentation - Wikipedia

    en.wikipedia.org/wiki/X86_memory_segmentation

    The x86-64 architecture does not use segmentation in long mode (64-bit mode). Four of the segment registers, CS, SS, DS, and ES, are forced to base address 0, and the limit to 2 64. The segment registers FS and GS can still have a nonzero base address. This allows operating systems to use these segments for special purposes.

  8. Category:x86-64 operating systems - Wikipedia

    en.wikipedia.org/wiki/Category:X86-64_operating...

    These are operating systems that run on the x86-64 architecture. ... Pages in category "x86-64 operating systems" The following 84 pages are in this category, out of ...

  9. Large-file support - Wikipedia

    en.wikipedia.org/wiki/Large-file_support

    The shift towards 64-bit started in 2014 when all new processors were designed to a 64-bit architecture and Android 5 ("Lollipop") was published in that year providing a fitting 64-bit variant of the operating system. [15] [14] Apple had made shift in the year before starting to produce the 64-Bit Apple A7 by 2013.