I/O Magic 16X - Manual (Page 21)

15
Copy Protection / Decryption
Most DVD titles, particularly Hollywood movie titles are encrypted by region code
numbers to protect each region’s distribution of the title. In general, the whole world is
divided into six regions and users are only allowed to playback Hollywood titles of the
region they are located in. PowerDVD implements a strict decryption function allowing
users to define their region code numbers and playback encrypted titles. Users may
modify their region code numbers up to five times only.
Before You Begin
Some users may find the video/audio playback quality not as smooth as expected.
This is probably due to the fact that the DMA (Direct Memory Access) mode of your
DVD-ROM drive has not been enabled. Therefore, it is very important to make sure
that you have enabled the DMA mode of your DVD-ROM drive before using
PowerDVD.
If your system uses Intel chipset, such as 82440FX/LX/BX/EX or 82430FX/HX/VX/ TX,
please go through the following steps to enable the DMA mode of your IDE DVD-ROM
drive.
First refer to your system manual to determine whether there is an Intel
chipset. For system that uses non-Intel chipset, it is recommended that you
install the bus-master driver that can be found with your motherboard
support CD-ROM or disk.
It is noted that, with platforms based on non-Intel chipsets, the following steps to
enable the DMA mode may cause PowerDVD to work improperly on your system.
For Windows 95 OSR2 or Windows 98
1.First, double click on My Computer on Windows 95/98 desktop to access the DMA
setting through the following path: My Computer / Control Panel / System / Device
Manager / CDROM (16X DVD drive) / Settings.
2.On the Settings tab, you can see the DMA option on the Options window. Please
check this option to enable DMA.
3.Reboot your system to enable the DMA mode of your DVD-ROM drive. You should
be able to see that the video playback quality is improved.