ARCNET Adapter Board (260-6501) General Faxback Doc . 5477 The TRS-80 ArcNet System allows up to 255 Model IIs, 12s, and 16s to share on-linecentralized files with maximum security. The system consists of a File Processor and an Application Processor, a Hard Disk system, and an Active or Passive Hub or both. (dkh-08/03/93)