Title :
A multi-function FASTBUS front-end for VAXBI computers
Author :
Jost, B. ; Mertens, V. ; Marchioro, A. ; von Ruden, W.
Author_Institution :
CERN, Geneva
fDate :
10/1/1989 12:00:00 AM
Abstract :
A versatile and high-performance interface between DEC computers based on VAXBI and FASTBUS has been designed to couple a general-purpose FASTBUS master with a specially developed intelligent module. The hardware capabilities of the interface are discussed, with particular reference to the Aleph event builder (AEB), which is a single-width FASTBUS card based on the MC68020 CPU and the MC68881 floating-point coprocessor, and the AEB-VAX interface. The software, as implemented in the Aleph experiment at the LEP (Large Electron Position) collider, is presented, covering the communication protocol, the software for the high-speed interface to the DEC DRB32 BI adapter, the AEB software, and the VAX software. The results of a performance evaluation for single-word and block transfer actions are presented
Keywords :
DEC computers; computer interfaces; protocols; AEB software; AEB-VAX interface; Aleph event builder; Aleph experiment; DEC DRB32 BI adapter; DEC computers; FASTBUS; LEP; Large Electron Position; MC68020 CPU; MC68881 floating-point coprocessor; VAXBI; block transfer actions; communication protocol; high-performance interface; intelligent module; performance evaluation; Communication system control; Computer interfaces; Coprocessors; Data acquisition; EPROM; Fastbus; Hardware; Operating systems; Random access memory; Read-write memory;
Journal_Title :
Nuclear Science, IEEE Transactions on
