Commercial developers could afford cross development setups where the actual development happened on PCs and the code was transferred to the Spectrum, see for e

Commercial developers could afford cross development setups where the actual development happened on PCs and the code was transferred to the Spectrum, see for example: https://bizzley.42web.io/assets/it_s_behind_you___the_making_of_a_computer_game_by_bob_pape.pdf https://bizzley.42web.io/assets/it_s_behind_you___the_making...