enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Physical Address Extension - Wikipedia

    en.wikipedia.org/wiki/Physical_Address_Extension

    Mac OS X Tiger through Mac OS X Snow Leopard support PAE and the NX bit on IA-32 processors; Snow Leopard was the last version to support IA-32 processors. On x86-64 processors, all versions of macOS use 4-level paging (IA-32e paging rather than PAE) to address memory above 4GB. Mac Pro and Xserve systems can use up to 64 GB of RAM. [23]

  3. Executable-space protection - Wikipedia

    en.wikipedia.org/wiki/Executable-space_protection

    The 32-bit PAE desktop kernel (linux-image-generic-pae) in Ubuntu 9.10 and later, also provides the PAE mode needed for hardware with the NX CPU feature. For systems that lack NX hardware, the 32-bit kernels now provide an approximation of the NX CPU feature via software emulation that can help block many exploits an attacker might run from ...

  4. 3 GB barrier - Wikipedia

    en.wikipedia.org/wiki/3_GB_barrier

    Many 32-bit computers have 32 physical address bits and are thus limited to 4 GiB (2 32 words) of memory. [3] [4] x86 processors prior to the Pentium Pro have 32 or fewer physical address bits; however, most x86 processors since the Pentium Pro, which was first sold in 1995, have the Physical Address Extension (PAE) mechanism, [5]: 445 which allows addressing up to 64 GiB (2 36 words) of memory.

  5. NX bit - Wikipedia

    en.wikipedia.org/wiki/NX_bit

    The NX bit (no-execute) is a technology used in CPUs to segregate areas of a virtual address space to store either data or processor instructions. An operating system with support for the NX bit may mark certain areas of an address space as non-executable. The processor will then refuse to execute any code residing in these areas of the address ...

  6. Talk : Physical Address Extension/Archives/2014/August

    en.wikipedia.org/wiki/Talk:Physical_Address...

    PAE enables physical addresses beyond 4GB. 32-bit Windows OSs are limited to 4GB of virtual address space. Jeh 05:07, 8 January 2010 (UTC) The MikroS-PR marketed in-genius cover up and MS pr-dept. have to feed 'MS do not lience PAE' what mean == 'PAE does not work on 32 MikS. It works fine on 32-bit Server editions.

  7. PCI configuration space - Wikipedia

    en.wikipedia.org/wiki/PCI_configuration_space

    One of the major improvements the PCI Local Bus had over other I/O architectures was its configuration mechanism. In addition to the normal memory-mapped and I/O port spaces, each device function on the bus has a configuration space, which is 256 bytes long, addressable by knowing the eight-bit PCI bus, five-bit device, and three-bit function numbers for the device (commonly referred to as the ...

  8. Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  9. Page table - Wikipedia

    en.wikipedia.org/wiki/Page_table

    Each page table entry (PTE) holds the mapping between a virtual address of a page and the address of a physical frame. There is also auxiliary information about the page such as a present bit, a dirty or modified bit, address space or process ID information, amongst others.