Complex sentence: Initially it was intended that the Exemplar would be binary-compatible with HP's HP-UX operating system but eventually it was decided to port HP-UX to the platform and sell the platform as standalone servers.
Split into simpler sentences: Initially it was intended that the Exemplar would be binary-compatible with HP's HPUX. But eventually it was decided to port HPUX to the platform and sell the platform as standalone servers.