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The name originates from the Basic Input/Output System used in the CP/M operating system in 1975. [2] [3] The BIOS firmware was originally proprietary to the IBM PC; it was reverse engineered by some companies (such as Phoenix Technologies) looking to create compatible systems. The interface of that original system serves as a de facto standard.
AMD was the first to introduce the instructions that now form Intel's BMI1 as part of its ABM (Advanced Bit Manipulation) instruction set, then later added support for Intel's new BMI2 instructions. AMD today advertises the availability of these features via Intel's BMI1 and BMI2 cpuflags and instructs programmers to target them accordingly.
Standard PC BIOS is limited to a 16-bit processor mode and 1 MB of addressable memory space, resulting from the design based on the IBM 5150 that used a 16-bit Intel 8088 processor. [ 8 ] [ 34 ] In comparison, the processor mode in a UEFI environment can be either 32-bit ( IA-32 , AArch32) or 64-bit ( x86-64 , Itanium, and AArch64).
Am29510 hardware multiplier 16x16, 32-bit answers through 16-bit output Pictures: AMD_AM29510DC.jpg; Am29516 hardware multiplier 16x16, 32-bit answers through 16-bit output Pictures: AMD_AM29516DC.jpg; Am29517 hardware multiplier 16x16, 32-bit answers through 16-bit output Pictures: AMD_AM29517DC.jpg AMD_AM29L517DC.jpg; Am29520 Multilevel Pipe ...
AMD64 (also variously referred to by AMD in their literature and documentation as “AMD 64-bit Technology” and “AMD x86-64 Architecture”) was created as an alternative to the radically different IA-64 architecture designed by Intel and Hewlett-Packard, which was backward-incompatible with IA-32, the 32-bit version of the x86 architecture.
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64-bit Return from Interrupt JRCXZ rel8: E3 cb: Jump if RCX is zero LODSQ: REX.W AD: LoaD String Quadword MOVSXD r64,r/m32: REX.W 63 /r [c] MOV with Sign Extend 32-bit to 64-bit MOVSQ: REX.W A5: Move String Quadword POPFQ: 9D: POP RFLAGS Register PUSHFQ: 9C: PUSH RFLAGS Register SCASQ: REX.W AF: SCAn String Quadword STOSQ: REX.W AB: STOre ...
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