Multi-platform nightly builds of open source digital design and verification tools

Z80 open-source silicon clone. Goal is to become a silicon proven, pin compatible, open-source replacement for classic Z80.

Patch for Windows 9x to fix CPU issues

Hardware-level Z80 emulator for RomWBW with 512KB ROM + 512KB RAM banking and HBIOS support

MBASIC 5.21 source code reconstruction - byte-for-byte match with original binary

Welcome to Optery’s open-source directory of data brokers and opt-out information, the largest of its kind.

Modern MBASIC 5.21 Interpreter & Compilers

Codev helps humans and agents co-develop both the context and the code of the project.

An open-source reimplementation of Apple Macintosh System 7 for modern x86 hardware, bootable via GRUB2/Multiboot2

ImageDisk Utilities (Cross-Platform)

ImageDisk Library (cross-platform)

Decoder for Nortel Millennium Voiceware ROMs

Command Line Interface for Arduino

S-100 ATX Motherboard for PC Cases

A serial interface adapter for the PDP-11/05 minicomputer.

A FUSE module for accessing ancient Unix filesystems.

An RP2040-based ROM emulator

Flashlight bracket for the OK Industries Speed-Wrap wire wrap tool

This repository contains the KiCad files and the gerber files for the DuPAL boards.

Repository of antsdr firmware make

Build a SDR SW/MW/LW Receiver with a Raspberry Pi Pico

Versatile, cheap and portable USB to GPIB converter (USBTMC class based)

T568A to RJ11 Adapter

A versatile DIY serial terminal

Open source LXI tools

3D-Printable actuating cards for Western Electric wire-spring relays.

Firmware for the Mockingbird Telephone Exchange master controller

The original sources of MS-DOS 1.25 and 2.0, for reference purposes