For anyone who uses a real zx80 the attached article may be of interest.
it shows a small hardware mod to use I/O mapped hardware (Zonx-81 sweet talker etc)
and a short m/l routine to use the Sinclair printer without any mod.
I tested the printer routine and it works, with a better print quality than the 81.( it runs with a slower carrage speed than normal so maybe the styli have longer to burn off the ali paper coating)
Hope this is of use to someone
Moggy

