h6. [[PCI]] h6(. » [[PCI SWI Calls|SWI Calls]] h6((. » PCI_ConfigurationWrite h2. PCI_ConfigurationWrite h5. (SWI &50389) |_<^{width:4em}. Entry | | |<^. R0 |<^. Configuration space address (0-255) or bus/dev/fn/address| |<^. R1 |<^. Value to write | |<^. R2 |<^. Access size (1, 2 or 4 for byte/half word/word) | |<^. R3 |<^. [[Using PCI Devices|Function handle]], or 0 | |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved ? | |<^. R1 |<^. Preserved ? | |<^. R2 |<^. Preserved ? | |<^. R3 |<^. Preserved ? | h4. Use The purpose of this call is to perform a Configuration Write cycle of the denoted size. h4. Notes [[PCI_ConfigurationRead]] is used to perform a Configuration Read cycle of the denoted size. h4. See also * [[PCI_ConfigurationRead]] * [[Using PCI Devices]]