Before adding w89c35 driver "w35und.dll" into your platform builder, please make sure you have built an available run-time image.

Here is a couple instructions for adding our driver into your platform.

1)Copy all contents in platform.bib.txt and paste into platform.bib in your platform builder.

2)Copy all contents in Winbond_USB.reg.txt and paste into platform.reg in your platform builder.

3)Copy w35und.dll into the directory 
  located in "$(_WINCEROOT)\PUBLIC\COMMON\OAK\TARGET\$(_TGTCPU)\RETAIL".
  (for example:"C:\WINCE500\PUBLIC\COMMON\OAK\TARGET\X86\RETAIL")

4)Copy w35und.dll into the directory 
  located in "$(_FLATRELEASEDIR)".
  (for example: C:\WINCE500\PBWorkspaces\test2\RelDir\CEPC_x86_Release)

5)Copy w35und.dll into the directory
  located in"$(_PROJECTROOT)\cesysgen\oak\target\$(_TGTCPU)\RETAIL".
  (for example:"C:\WINCE500\PBWorkspaces\test2\WINCE500\CEPC_x86\cesysgen\oak\target\x86\retail")

6)Rebuild your OS with "Build and Sysgen" from the platform builder's memu "Build OS".