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
Sbectel service in conjunction with Teletext Ltd, Teletext on 4, on pages 400-499. In September 2007 the bilingual digital text service available on S4C Digidol was launched only to Freeview viewers in Wales. When the first area in Wales (most of South West Wales) completed its Digital Switchover on 9 September 2009, 'Sbectel' also ceased. Partly it has been replaced by service pages from s4c and bbc on the internet, as: Sbectel Sbectel () is the name of S4C's former ancillary teletext service. It was named after the Welsh language S4C programme magazine called Sbec (Welsh for 'peek') which was originally