sorry, u misread me, i meant pre 1989 machines with LED displays like say Teenage Mutant Ninja Turtles (although its a 1990 machine) but i meant machines pre DMD screens, machines during the eighties, how did they get software updates, was it a rom like 1990s dmd pinnys, and did u get my point about almost every dmd pinny having many code updates after production all listed on IPDB.

so i couldnt work out whay u thought no machines prior to stern machines didnt have code updates when almost all 90's dmd machines did have....see IPDB ?