rendering graphics with teletext; Bedstead; Windows font rendering glitch

cf. https://bjh21.me.uk/bedstead/, https://galax.xyz/TELETEXT/, https://en.wikipedia.org/wiki/Teletex... p.s. Example of a graphics implemented with Bedstead/teletext: https://i.imgur.com/cXnzi79.png, https://i.imgur.com/C3YledV.png