Andrew Davidson's starred repositories
Z80onMDR_lite
ZX Spectrum Z80 snapshot to MicroDrive MDR image converter
ZXS_I2_kartridz
Simple ROM cartridge for Sinclair ZX Interface 2.
CLK
A latency-hating emulator of: the Acorn Electron and Archimedes, Amstrad CPC, Apple II/II+/IIe and early Macintosh, Atari 2600 and ST, ColecoVision, Enterprise 64/128, Commodore Vic-20 and Amiga, MSX 1/2, Oric 1/Atmos, early PC compatibles, Sega Master System, Sinclair ZX80/81 and ZX Spectrum.
bumbershoot
Full source and demonstration code for techniques described on the Bumbershoot Software blog
ZX-Spectrum-S-Video
S-Video Modification PCB for the ZX Spectrum
zx-iot-video
ESP32-based Tape/WLAN file server for ZX81, with VGA and/or LCD display support
-Interface-2-clone
By: Piotr Biela at Spectrum For Everyone Facebook group, initaly shared via Dropbox file Interface that allows the use of cartridges with games / programs with any ZX Spectrum (controlled by a jumper - ZX48 (position 1) and + 2A/B / + 3 (position 2)). Diode is: 1N4148 (0805 size)
ZX-Interface-2.021
An old-school remake of the ZX Interface 2 with some modern tweaks - mainly by integrating bank switching into the interface itself. Everything done with basic logic chips and components, no magic black boxes to be found anywhere!
zxspectrum-bom
ZX Spectrum 48K Issue 3B Bill of Materials
ZX-Spectrum-MX-Keycaps
SVG file for WASD Keyboards Keycaps.
dramtester
Dram tester for 4116 and 4164/256
zx81-keyboard
ZX81 Mechanical Keyboard
ZX81plus38
Mij latest ZX81 clone without ULA built from discrete pin through hole components
zx-diagnostics
Firmware to allow functional testing of ZX Spectrum hardware and related clones. See the wiki for full details.
zxs-assembly-tutorial
Z80 Assembly Tutorial for ZX Spectrum Development
python_lcd
Python based library for talking to character based LCDs.
pico-micropython-examples
Examples to accompany the "Raspberry Pi Pico Python SDK" book.
rc2014-ds1302-rtc
DS1302 Real Time Clock for the RC2014 computer