Title :
A VME based MAP node running under OS9 operating system
Author :
Cancelo, G.I.E. ; Catalfo, J.M. ; Mayosky, M.A.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
fDate :
10/1/1989 12:00:00 AM
Abstract :
A description is given of a MAP-(Manufacturing-Automation-Protocol-) based LAN (local area network) node implemented in VME. It provides a high-speed communication channel for distributed-intelligence systems. The node has a 20-MHz, 32-bit processor, which executes the software layers of the OSI (Open Systems Interconnection) communications model, and a LAN coprocessor, which carries out the lowest level of the OSI functions, including physical and medium-access-control layers. The node includes 512 Kbytes of dual-ported RAM for use as a shared resource on VME, to support block transfers. A real-time multitasking operating system supports all VME and MAP software, allowing multiple communication processes and optimization of local resources
Keywords :
distributed processing; local area networks; protocols; LAN coprocessor; OSI functions; Open Systems Interconnection; VME; distributed-intelligence systems; dual-ported RAM; high-speed communication channel; local area network; medium-access-control layers; real-time multitasking operating system; shared resource; Automatic control; Bandwidth; Communication system software; Coprocessors; Local area networks; Manufacturing automation; Master-slave; Media Access Protocol; Operating systems; Resource management;
Journal_Title :
Nuclear Science, IEEE Transactions on
