OS Image for PDS-811/PDS-821
You can get the last OS image file from the following locations:
Update OS Image
Use "upload" and "bios1" command on 7188XW.exe to update MiniOS7.
More information, please refer to the downloadupdate_v2.pdf file on
7188XW Utility (Win32 Console Program)
7188XW utility is an Win32 console program used to update OS image and firmware.