WRITING METHOD FOR PCI DEVICE DRIVER AND PCI DEVICE DRIVER

摘要

PROBLEM TO BE SOLVED: To reduce the data writing processing time α of byte units of word data while reducing the call frequency n of a device driver writing function.;SOLUTION: When a PCI device driver 101 writes data 11 of n words in a shared memory region 12, the device driver writing function is called once, and the leading address of the data of n words is transferred to the PCI device driver, and defined as m-th word data 111, and the m-th word data are divided into m-th word high order byte 112 and m-th word low order byte 113, and they are respectively compared with (m-1)th word high order byte 114 and (m-1)th word low order byte 115 which are the previous data by a byte data comparing part, and only when they are not matched, the byte data are written in a byte data writing part 116.;COPYRIGHT: (C)2006,JPO&NCIPI