BBC Micro depth, resolution and memory economy. In the first models, the OS and applications were left with the RAM left over from the display mode. Mode 7 was a Teletext mode, extremely economical on memory and an original requirement due to the BBC's own use of broadcast teletext (Ceefax). It also made the computer useful as a Prestel terminal. The teletext characters were generated on board, for use with monitors and TV sets without a Teletext receiver. Train time displays at UK stations were driven by BBC Master computers in this mode until around the late 1990s. Mode 7 used only
Service Information Service Information Service Information was a regular programme in the early days of colour television in the United Kingdom that gave out engineering information for the radio and television trade. These announcements were made by the BBC continuity announcers of the time and were read over in-vision captions. The programme was broadcast on BBC2 three times a day, 10.00am, 11.30am, and 2.30pm each weekday from 23 October 1967 to 1975, then once a day at 10.30am from 1975 until the final broadcast on 23 December 1982. The IBA (and its predecessor, the ITA) had a similar programme titled "Engineering Announcements",