[medwards666]

Copying listings from computer magazines into a ZX81 ... could never get the damn tape drive to save anything that would then reload (either a cheap tape deck, or cheap tapes)... so had no choice but to hand-code.

Also, didn't have the cash to go buy games from the local computer store so this was the next best thing...

[JeanMarcS]

This and a Z80 assembler book to speed up a bit code because the basic was really too slow to do anything (had the 16k memory extention too because 800 and something octet were not enough)