h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » OS_Byte 20 h2. OS_Byte 20 h5. (SWI &06) |_<^{width:3em}. Entry | | |<^. R0|<^. 20 (&14) | |_<^{width:3em}. Exit|_<^. | |<^. R0|<^. Preserved | |<^. R1|<^. Corrupted | |<^. R2|<^. Corrupted | h4. Use The purpose of this call is to reset the VDU font definitions. h4. Notes This call is used to reset the shape of the printable ASCII characters in the range of 32-127, which may be modified with [[VDU 23,32]] – 255. To reset the whole or a smaller group of character definitions, use [[OS_Byte 25]]. h4. See also * [[OS_Byte]] * [[OS_Byte 25]] * [[VDU 23,32]]