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The amazing multi-processor 8-bit microcomputer, featuring Z80, 6502 and AVR processors. Built with CPLDs, CERBERUS 2100™ is fully programmable even with respect to its hardware, at the individual gate and flip-flop level.
A curated list of minitel resources
Datapoint 2200
Datapoint 2200 Schematics and Documents
A Raspberry Pi Pico (RP2040)-based 2114 SRAM Emulator for the Busch 2090 Microtronic Computer System
UTF-8 <-> KOI-7 encoder/decoder.
Amplifier from DIY magazine for ZX Spectrum
Another custom ROM cartridge for ZX Interface 2, supporting 256kb EPROM with manual ROM selection using switch
DIY construction from danish magazine Ny Elektronik 1985 to improve loading from tape for ZX Spectrum, ZX81 & Lambda computers.