Showing 148 open source projects for "bit-twist"

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  • 1
    os-tutorial

    os-tutorial

    How to create an OS from scratch

    os-tutorial is an open source educational project by cfenollosa that teaches the basics of building an operating system from scratch. The repository provides step-by-step lessons starting with bootloaders and moving through kernel development, interrupts, memory management, and system calls. Each tutorial is accompanied by clear explanations, code examples, and references to deepen understanding. The project uses x86 assembly and C to illustrate concepts, making it accessible to students and...
    Downloads: 7 This Week
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  • 2
    Microsoft BASIC for 6502 Microprocessor

    Microsoft BASIC for 6502 Microprocessor

    Microsoft BASIC for 6502 Microprocessor

    Microsoft BASIC for 6502 is the original assembly-language source code for Microsoft’s BASIC interpreter version 1.1, written for the MOS Technology 6502 8-bit microprocessor back in the late 1970s. It was used on pioneering personal computers (such as the Apple II, Commodore PET, etc.), enabling users to write and run programs in BASIC on those systems. The repo contains the full source (in 6502 assembly), with support for multiple hardware platforms via conditionals, includes floating-point arithmetic, string handling, arrays, math functions, I/O, etc. ...
    Downloads: 2 This Week
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  • 3
    rav1e

    rav1e

    The fastest and safest AV1 encoder

    ...This makes rav1e particularly attractive for scenarios where you need AV1 encoding but care about build-time, portability, and maintenance overhead, or where the full-featured reference encoder might be prohibitively slow. Despite aiming for simplicity, rav1e supports a wide range of AV1 features: different bit depths, chroma subsampling formats, prediction and transform modes, and block partitioning options, which means it can produce reasonably efficient compressed video.
    Downloads: 1 This Week
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  • 4
    This is one of the most popular Doom source ports. It is available for DOS, Windows, Linux and Mac OS X, and should build on any POSIX platform which supports SDL. It enhances Doom with things like TCP/IP networking, OpenGL renderer, Heretic support and much more.
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    Downloads: 119 This Week
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  • 5

    UniSIMD-assembler

    SIMD macro assembler unified for ARM, MIPS, PPC and x86

    ...The assembler itself isn't a separate tool, but rather a collection of C/C++ header files, which applications need to include directly in order to use. At present, Intel SSE/SSE2/SSE4 and AVX/AVX2/AVX-512 (32/64-bit x86 ISAs), ARMv7 NEON/NEONv2, ARMv8 AArch32 and AArch64 NEON, SVE (32/64-bit ARM ISAs), MIPS 32/64-bit r5/r6 MSA and POWER 32/64-bit VMX/VSX (little/big-endian ISAs) are mostly implemented (/w horizontal reductions) although scalar improvements, wider SIMD vectors with zeroing/merging predicates in 3/4-operand instructions are planned as extensions to current 2/3-operand SPMD-driven vertical SIMD ISA. ...
    Downloads: 1 This Week
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  • 6
    Modifications to IBM's MVS 3.8j operating system (delivered via turnkey-mvs) to add some z/OS (MVS/XA, OS/390) functionality, especially 31-bit addressing. Note that the latest dev Hercules/380 is available from http://pdos.org
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    Downloads: 33 This Week
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  • 7

    Ed448-Goldilocks

    A 448-bit Edwards curve

    This is an implementation of elliptic curve cryptography using the Montgomery and Edwards curves Curve25519, Ed25519, Ed448-Goldilocks and Curve448, using the Decaf / Ristretto encoding.
    Downloads: 20 This Week
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  • 8
    ASAP - Another Slight Atari Player
    ASAP (Another Slight Atari Player) plays and converts 8-bit Atari music (*.sap, *.cmc, *.mpt, *.rmt, *.tmc, ...) on modern computers and mobile devices.
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    Downloads: 38 This Week
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  • 9

    breadcomp80v1

    An 8-bit puter on a breadboard

    ...This was supposed to be nothing more than a practical joke which quite unexpectedly worked out. It is not optimized (never meant to be), the CP/M3 port working on it is very crude and the bit-banging SPI over AY's I/O ports is terribly slow when it comes to accessing the SD Card adapter (C:). There are several awkwardness in the design, e.g., the first occurence of the ~HALT signal is disconnecting ROM, leaving only the RAM to be accessible by the CPU until RESET (actually, it's this feature that made CP/M bootable on it!). ...
    Downloads: 0 This Week
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  • 10

    QuadRay-engine

    Realtime raytracer using SIMD on ARM, MIPS, PPC and x86

    ...The rendering core of the engine is written in a unified SIMD assembler allowing single assembler code to be compatible with different processor architectures, thus reducing the need to maintain multiple parallel versions. At present, Intel SSE/SSE2/SSE4 and AVX/AVX2/AVX-512 (32/64-bit x86 ISAs), ARMv7 NEON/NEONv2, ARMv8 AArch32 and AArch64 NEON, SVE (32/64-bit ARM ISAs), MIPS 32/64-bit r5/r6 MSA and POWER 32/64-bit VMX/VSX (little/big-endian ISAs) are mostly implemented (/w horizontal reductions) although scalar improvements, wider SIMD vectors with zeroing/merging predicates in 3/4-operand instructions are planned as extensions to current 2/3-operand SPMD-driven vertical SIMD ISA. ...
    Downloads: 0 This Week
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  • 11
    MineBios

    MineBios

    16 bit real mod minecraft clone running in bios

    Downloads: 1 This Week
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  • 12

    Minimal-GPSDO

    A GPSDO with superior performance using a few cheap components

    ** To download everything, MinGPSDO.zip ** The design criteria for this GPSDO (GPS disciplined oscillator) were: ● Output 10MHz accurate to better than ±0.01Hz (1 part per billion) ● Use low cost components (cheapest GPS module, etc.) ● Be self monitoring so the accuracy can be guaranteed without reference to a better standard ● Require no tuning by the user ● Give feedback to the user of the current status ● If it can be done in software, do it in software The initial design...
    Downloads: 7 This Week
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  • 13
    ImpLib SDK

    ImpLib SDK

    ImpLib SDK produces custom Import libraries for Windows DLL

    ImpLib SDK combines free programming tools for authoring custom import libraries for Windows DLL (32 and 64 bit). The SDK supports advanced features, like cdecl2stdcall conversion, importing by ordinal, removing original thunk, storing symbols from different DLL files in a single import library. The ImpLib SDK is also useful to overcome any legal restrictions when redistributing the import libraries for certain DLL files, like the Microsoft® C++ runtime.
    Downloads: 5 This Week
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  • 14
    ELENA Programming Language

    ELENA Programming Language

    an object-oriented language with late binding

    ELENA is a general-purpose, pure object-oriented language with late binding. It promotes more object-oriented program design, reusable and more standardized code. The package includes compiler, IDE, ELENA libraries and samples
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    Downloads: 4 This Week
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  • 15
    A new 64-bit RISC platform, complemented by a set of development tools, standards specifications and synthesizable VHDL implementations.
    Downloads: 0 This Week
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  • 16
    Apple Disk Transfer ProDOS

    Apple Disk Transfer ProDOS

    Transfer disks and disk images between the Apple II and the real world

    Apple Disk Transfer ProDOS (ADTPro) transfers classic 8-bit Apple disk images over a serial, ethernet or audio link to a more modern computer. Based on the seminal ADT, ADTPro can transfer any ProDOS- or SOS-visible volume.
    Downloads: 9 This Week
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  • 17
    libjpeg-turbo

    libjpeg-turbo

    SIMD-accelerated libjpeg-compatible JPEG codec library

    ...libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API. libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface.
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    Downloads: 41,315 This Week
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  • 18

    open-watcom

    Open Watcom C/C++ compilers and tools Fork

    C/C++ compilers and tools to compile and build for targets DOS 16/32-bit, RDOS, Windows 16/32-bit, OS/2 16/32 bit, Linux 32-bit (x86), Netware running on host OS DOS, Windows 16/32/64-bit, OS/2, Linux 32/64-bit (x86/x64) Open Watcom is now completely moved to GitHub Open Watcom 2.0 https://github.com/open-watcom/open-watcom-v2#open-watcom-v2-fork Open Watcom 1.9 https://github.com/open-watcom/open-watcom-1.9
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    Downloads: 44 This Week
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  • 19
    modplug

    modplug

    A music tracker software for Windows.

    ...The official code repository can now be found at https://source.openmpt.org/browse/openmpt/ OpenMPT is a Windows-based audio application used to produce music. The application was initially a private project developed by Olivier Lapicque and is a popular 'tracker' used by many musicians. OpenMPT is available as both a 32-bit and 64-bit application. For more information and downloads, see https://openmpt.org/ libopenmpt, a cross-platform module playback library, is based on the OpenMPT project. Up-to-date libopenmpt downloads and documentation can be found at https://lib.openmpt.org/
    Downloads: 2 This Week
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  • 20
    HelenOS

    HelenOS

    A microkernel-based multiserver operating system written from scratch.

    HelenOS is a portable microkernel-based multiserver operating system written from scratch. It decomposes key operating system functionality such as file systems, networking, device drivers and graphical user interface into a collection of fine-grained user space components that interact with each other via message passing. A failure or crash of one component does not directly harm others. HelenOS is therefore flexible, modular, extensible, fault tolerant and easy to understand. HelenOS...
    Downloads: 3 This Week
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  • 21

    asm68c

    Assembles M6800 and 6801 assembly language source code. (and Forth)

    ...Now uses standard LDAA syntax by default. Produces basic S1/S9 object files and assembly listings, and now binary and MC-10 compatible cassette images. (This is for the 8-bit 6800, not the 16/32 bit 68000/coldfire processors.)
    Downloads: 1 This Week
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  • 22
    Citoplazma - Atari XL/XE demo

    Citoplazma - Atari XL/XE demo

    Demo presented on Forever 2011 - 2nd place

    Demo for 8-bit Atari XL/XE computers presented at Forever C (2011) demoparty at Horna Suca, Slovakia This demo won 2nd place in Atari demo compo. If you don't know how to run it go Wiki!
    Downloads: 0 This Week
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  • 23
    HelloSilicon

    HelloSilicon

    An introduction to ARM64 assembly on Apple Silicon Macs

    An introduction to assembly on Apple Silicon Macs. In this repository, I will code along with the book Programming with 64-Bit ARM Assembly Language, adjusting all sample code for Apple's ARM64 line of computers. While Apple's marketing material seems to avoid a name for the platform and talks only about the M1 processor, the developer documentation uses the term "Apple Silicon". You need Xcode 12.2 or later, and to make things easier, the command line tools should be installed. ...
    Downloads: 0 This Week
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  • 24
    Aleph One is a highly sophisticated program for generating fractals. Some major features are: A built-in expression generator, 32-bit colouring schemes for the fractals, multi-threaded and multi-server rendering! WOW! And lots, lots more... The source code has moved to GitLab: https://gitlab.com/jmmcg/alephone
    Downloads: 2 This Week
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  • 25
    Specialist-S

    Specialist-S

    8-bit home-made computer on Z80 CPU

    This is a renaissance of the "Specialist" micro-computer published in the popular "Modelist-Constructor" magazine issue #2, 1987 by A. Volkov. The original design was used the Soviet i8080A analog - KR580IK80A (KR580VM80A), but this one is based on the Z80A CPU. Postfix "S" in the project name designates a "simple" design.
    Downloads: 0 This Week
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