zimpenfish on 40 years later, a game for the ZX Spectrum will be again broadcast over FM radio

TL;DR:

A '0' bit is encoded as 2 pulses of 855 T-states each.

A '1' bit is encoded as 2 pulses of 1710 T-states each (ie. twice the length of a '0')

A 'pulse' here is either a mark or a space, so 2 pulses makes a complete square wave cycle.

Comments