Changes
/* Links */
* [https://sinclair.zilog.fr Sinclair's Spirit (FR)] Learn how to code with Z80 Assembler on ZX Spectrum with [[BDCIron]]
* [https://problemkaputt.de/zxdocs.htm Noca$h's ZXdocs]
*[https://pdfcoffee.com/the-zx-spectrum-ula-how-to-design-a-micro-chris-smith-pdf-free.html The ZX Spectrum ULA ebook]
* [https://worldofspectrum.net/documentation/ ZX Spectrum documentation]
* http://scratchpad.wikia.com/wiki/ZX_Spectrum_technical_information
