Acorn BBC Micro and Sinclair Spectrum. BASIC. Various Usbourne books. I wrote a text editor on my Spectrum in BASIC. It was too slow at keeping up with your typ

Acorn BBC Micro and Sinclair Spectrum. BASIC. Various Usbourne books. I wrote a text editor on my Spectrum in BASIC. It was too slow at keeping up with your typing, so I figured out enough about Z80 assembly to write a little routine to speed up the slow bit. Later I made a sort of GUI front-end for my Spectrum, inspired by the Macs at school.