7/31/95         Combine Master DMA Mode and Slave PIO Mode in a driver.
                Transfer Mode default set to Slave PIO.
                Add /M option in config.sys to enable Mater DMA Mode.

8/22/95         Support CD-ROM installed as Secondary Channel master.
                Run PIO mode if hard disk doesn't support DMA mode.
                Run PIO mode if Western Digital Caviar hard disk.