h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » OS_Byte 219 h2. OS_Byte 219 h5. (SWI &06) |_<^{width:4em}. Entry | | |<^. R0|<^. 219 (&DB) | |<^. R1|<^. EOR value | |<^. R2|<^. AND value | |_<^{width:4em}. Exit|_<^. | |<^. R0|<^. Preserved | |<^. R1|<^. Previous value | |<^. R2|<^. Corrupted | h4. Use The purpose of this call is to read or write the character that the tab key produces. h4. Notes If 128 <= value <= 255 then the character inserted in the buffer is modified by shift and control: |_<^{width:4em}. Key|_<^. Modification| |<^. Shift|<^. Value EOR &10 | |<^. Control|<^. Value EOR &20 | h4. See also * [[OS_Byte]] [link3]VDU+Codes