The vidc.rlec=ativdacc.drv entry in the [installable compressors]
section of the SYSTEM.INI file can cause problems when playing large
RLE-compressed movies. Remove this entry from the SYSTEM.INI file.
For update drivers, contact ATI Technologies Inc..
Operating and Performance Tips:
Performance and the Smartdrive Disk Cache.
If your computer uses the double buffering feature of MS-DOS 6, AVI
files may play slowly on your computer. If your CONFIG.SYS file contains
command that starts SMARTDRV with the DOUBLE_BUFFERING parameter,
add the /L switch to the SMARTDrive command in your AUTOEXEC.BAT file.
If adding the /L switch doesn't increase the playback speed enough,
try removing the DOUBLE_BUFFERING parameter altogether. Before you
remove DOUBLE_BUFFERING parameter, consult your Windows documentation
or MS-DOS Help to determine whether your computer needs the parameter
to run correctly.