The top lines of this chart provides ID number's that may assist in determining which card you have. (NOTE: This is a large page that may take some time to load.)
An older version of this document specifies that the file rip99up1.exe is used to update the PC99 drivers. (e.g. from rippc99na.exe) While the (above) current version of this document advocates downloading and installing the version 4.17 update. (rip417na.exe)