Teeny-tiny ESP8266 ZX Spectrum 48K laptop :)

The source code for Denes' Wemos D1 Mini ZX Spectrum (As shown in https://www.facebook.com/groups/164156683632183/permalink/3351985538182599)

The latest version of the 3D printed case: https://www.thingiverse.com/thing:4746785

Inspired by and based on https://github.com/aldolo69/esp8266_zxspectrum_emulator \

acknowledgements of others valuable works:

Marat Fayzullin for z80 cpu emulation
https://fms.komkon.org/EMUL8/
Bill Greiman for the best SdFat library
https://github.com/greiman/SdFat
Bodmer for the TFT_eSPI lib
https://github.com/Bodmer/TFT_eSPI

Schematics:

Compiles with the standard Arduino ESP8266 core (2.5.2).

SPIFFS works* but disabled for now because memory is really tight and it allocates 2K.

Parts list:

1x Wemos D1 Mini
1x ili9341 320x256 TFT display (the prototype shows a 2.8" one but there are various sizes and versions available)
2x PCF8574P I2C multiplexers
43x micro buttons
1x micro joystick
1x Wemos battery shield
1x microSD shield or socket 1x mini speaker
1x 2N2222A NPN transistor
1x 220 Ohm resistor
1x 90x70mm protoboard and a lot of tiny wires, soon to be replaced with custom PCB :)
3D printed shell
8x M2x6mm screws