The FASTBUS master module based on a 68020 microprocessor

A FASTBUS master module, 68K20FPI (68020 FASTBUS Processor Interface), which has the Motorola MC68020 32-bit microprocessor unit (MPU) and the MC68881 floating point coprocessor (FPCP), is presented. The 68K20FPI is intended to be used for a second-level trigger processor in a multiprocessor environment. It has a local-memory sunboard of 1-Mb static RAMs and a 512-kb ROM port, which are accessed from both the CPU and FASTBUS side. The SCSI (Small Computer Systems Interface) is adopted as a disk interface and also as a high-speed ( approximately 4-Mb/s) interface to other computers. The Ethernet interface is used for a communication line between the 68K20FPIs and a host computer. Two RS232C interfaces are used as terminal and host communication ports. A NIM level input and output are used for trigger purposes.<>