surf:drawSurfaceSmall

surf:drawSurfaceSmall(surf2, x, y)

• surf2 (surface)
  Source surface
• x, y (int)
  Target position

Draws another surface on the surface using the ComputerCraft teletext characters, which can give you 6x bigger resolution.
Errors if the source surface width isn't a multiple of 2 or if the height isn't a multiple of 3.
Note: the source surface cannot contain transparent pixels.