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  2. x86 instruction listings - Wikipedia

    en.wikipedia.org/wiki/X86_instruction_listings

    Read Time Stamp Counter and Processor ID. RDTSCP: 0F 01 F9: Read Time Stamp Counter and processor core ID. [v] The TSC value is placed in EDX:EAX and the core ID in ECX. [w] Usually 3 [x] K8, [y] Nehalem, Silvermont, Nano: POPCNT [z] Population Count. POPCNT r16,r/m16 POPCNT r32,r/m32: F3 0F B8 /r: Count the number of bits that are set to 1 in ...

  3. System Management BIOS - Wikipedia

    en.wikipedia.org/wiki/System_Management_BIOS

    Version 1 of the Desktop Management BIOS (DMIBIOS) specification was produced by Phoenix Technologies in or before 1996. [5] [6] Version 2.0 of the Desktop Management BIOS specification was released on March 6, 1996 by American Megatrends (AMI), Award Software, Dell, Intel, Phoenix Technologies, and SystemSoft Corporation. It introduced 16-bit ...

  4. BIOS interrupt call - Wikipedia

    en.wikipedia.org/wiki/BIOS_interrupt_call

    BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...

  5. Ralf Brown's Interrupt List - Wikipedia

    en.wikipedia.org/wiki/Ralf_Brown's_Interrupt_List

    Ralf Brown's Interrupt List (aka RBIL, x86 Interrupt List, MS-DOS Interrupt List or INTER) is a comprehensive list of interrupts, calls, hooks, interfaces, data structures, CMOS settings, memory and port addresses, as well as processor opcodes for x86 machines from the 1981 IBM PC up to 2000 (including many clones), [1] [2] [nb 1] most of it still applying to IBM PC compatibles today.

  6. BIOS - Wikipedia

    en.wikipedia.org/wiki/BIOS

    In computing, BIOS (/ ˈ b aɪ ɒ s,-oʊ s /, BY-oss, -⁠ohss; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). [1]

  7. INT 13H - Wikipedia

    en.wikipedia.org/wiki/INT_13H

    INT 13h is shorthand for BIOS interrupt call 13 hex, the 20th interrupt vector in an x86-based (IBM PC-descended) computer system.The BIOS typically sets up a real mode interrupt handler at this vector that provides sector-based hard disk and floppy disk read and write services using cylinder-head-sector (CHS) addressing.

  8. INT 10H - Wikipedia

    en.wikipedia.org/wiki/INT_10H

    INT 10h is fairly slow, so many programs bypass this BIOS routine and access the display hardware directly. Setting the video mode, which is done infrequently, can be accomplished by using the BIOS, while drawing graphics on the screen in a game needs to be done quickly, so direct access to video RAM is more appropriate than making a BIOS call ...

  9. Partition type - Wikipedia

    en.wikipedia.org/wiki/Partition_type

    The partition type (or partition ID) in a partition's entry in the partition table inside a master boot record (MBR) is a byte value intended to specify the file system the partition contains or to flag special access methods used to access these partitions (e.g. special CHS mappings, LBA access, logical mapped geometries, special driver access, hidden partitions, secured or encrypted file ...