HD Controller & Removable drive
CMD PCI 646U2-648-649
Ultra DMA Ide Controller
Driver File Size
ContentsI.OverviewII.Applicable HardwareIII.InstallationIV.New Features And EnhancementsV.CorrectionsVI.Known RestrictionsI.OverviewDriver File: csa64xx.sysDriver version: 3.0.8Driver Dates: 6/07/2000OS required to run: Windows NT4.0Other Files included: CmdCfgNt.exeII.Applicable HardwareThis release supports the following hardware: CMD IDE 0648 for WHQL1.InstallationFollow the Microsoft driver update procedures.2.New Features and EnhancementEnhancement: Changed algorithm for setting the correct value for task file timing register.3.CorrectionsSymptom: Connect Richo CD-R/RW (model RW7060A) to the secondary channel master and any hard disk as secondary slave, after system boot up, driver can not see the hard disk.Action: This problem has been fixed.Symptom: Timing issue for 649 Rev. 2 – On some older motherboards, system hangs during boot.Action: Before sending any command to devices, set chip mode to PIO 0 (during boot time and after software reset). Also change recovery count to 3 for PIO mode 0, 1, and 2 if controller chip is 649 Rev. 2.