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  2. Intel 8255 - Wikipedia

    en.wikipedia.org/wiki/Intel_8255

    The Bit Set/Reset (BSR) mode is available on port C only. Each line of port C (PC 7 - PC 0) can be set or reset by writing a suitable value to the control word register. BSR mode and I/O mode are independent and selection of BSR mode does not affect the operation of other ports in I/O mode. [13] 8255 BSR mode. D 7 bit is always 0 for BSR mode.

  3. List of computer simulation software - Wikipedia

    en.wikipedia.org/wiki/List_of_computer...

    Elmer - an open-source multiphysical simulation software for Windows/Mac/Linux. FlightGear-a free, open-source atmospheric and orbital flight simulator with a flight dynamics engine (JSBSim) that is used in a 2015 NASA benchmark [1] to judge new simulation code to space industry standards.

  4. Microarchitecture simulation - Wikipedia

    en.wikipedia.org/wiki/Microarchitecture_simulation

    In particular, a piece of software that simulates a microprocessor executing a program on a cycle-by-cycle basis is known as cycle-accurate simulator, whereas instruction set simulator only models the execution of a program on a microprocessor through the eyes of an instruction scheduler along with a coarse timing of instruction execution. Most ...

  5. Computer architecture simulator - Wikipedia

    en.wikipedia.org/.../Computer_architecture_simulator

    A cycle-accurate simulator is a computer program that simulates a microarchitecture on a cycle-by-cycle basis. In contrast an instruction set simulator simulates an instruction set architecture usually faster but not cycle-accurate to a specific implementation of this architecture; they are often used when emulating older hardware, where time precision is important for legacy reasons.

  6. Instruction set simulator - Wikipedia

    en.wikipedia.org/wiki/Instruction_set_simulator

    Simics - CPU and full system simulator framework, building complete models of complex modern hardware. Simh - Simulation of 50+ historic computers including full PDP-11 systems with I/O, in development since the 1960's. CPU-OS Simulator - Integrated RISC type CPU and multithreading operating system educational simulators. Other

  7. x86 Bit manipulation instruction set - Wikipedia

    en.wikipedia.org/wiki/X86_Bit_manipulation...

    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.

  8. x86 instruction listings - Wikipedia

    en.wikipedia.org/wiki/X86_instruction_listings

    Will change OperandSize from 16-bit to 32-bit if CS.D=0, or from 32-bit to 16-bit if CS.D=1. 67h: AddressSize override. Will change AddressSize from 16-bit to 32-bit if CS.D=0, or from 32-bit to 16-bit if CS.D=1. The 80386 also introduced the two new segment registers FS and GS as well as the x86 control, debug and test registers.

  9. Simics - Wikipedia

    en.wikipedia.org/wiki/Simics

    ARM Fastsim, an instruction-set simulator and set of system models for ARM IP.; Gem5, an open source full-system and ISA simulator and framework.; OVPsim, a full-system simulation framework which is free for non-commercial use, and which comes with over 100 open source models and platforms that run Linux, Android, and many other operating systems.