h6. [[Programmer's Reference Manuals]] h6(. » [[Vectors]] h6((. » [[Software Vector Numbers]] h6(((. » UKPLOTV h2. Unknown Plot Vector (25) |_<^{width:3em}. Entry |<^. | |<^. R0|<^. Plot command code| |_<^{width:3em}. Exit |<^. | |<^. R0|<^. Preserved| h4. Use This vector is called when an [[VDU 25]] plot command or [[OS_Plot]] SWI is issued with an unknown parameter. h4. Notes Whenever an unrecognised byte is found following 25 in the VDU stream, or [[OS_Plot]] is called with an unrecognised R0, then this vector is called. R0 contains this unknown plot command code - the current and 3 previous positions of the graphics cursor can be read with [[OS_ReadVduVariables]] from variables &8C - &93, allowing custom plot routines to be implemented. The default owner of this vector does nothing - unknown plot options are ignored. h4. See also * [[OS_Plot]] * [[OS_ReadVduVariables]] * [[Software Vector Numbers]] * [[VDU 25]]