R. Atmur et al., A VME-BASED SOFTWARE TRIGGER SYSTEM USING UNIX PROCESSORS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 385(1), 1997, pp. 81-84
We have constructed a distributed computing platform with eight proces
sors to assemble and filter data from digitization crates. The filtere
d data were transported to a tape-writing UNIX computer via ethernet.
Each processor ran a UNIX operating system and was installed in its ow
n VME crate. Each VME crate contained dual-port memories which interfa
ced with the digitizers. Using standard hardware and software (VME and
UNIX) allows us to select from a wide variety of non-proprietary prod
ucts and makes upgrades simpler, if they are necessary.