h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » OS_Byte 250 h2. OS_Byte 250 h5. (SWI &06) |_<^{width:4em}. Entry | | |<^. R0|<^. 250 (&FA) | |<^. R1|<^. 0 | |<^. R2|<^. 255 | |_<^{width:4em}. Exit|_<^. | |<^. R0|<^. Preserved | |<^. R1|<^. VDU driver screen bank | |<^. R2|<^. Display screen bank (see [[OS_Byte 251]]) | h4. Use The purpose of this call is to read the screen bank used by the display, as set by [[OS_Byte 112]] h4. Notes This call should not be used to write the value - doing so would only change the value in memory, without affecting the hardware. h4. See also * [[OS_Byte]] * [[OS_Byte 112]]