%T The meaning and implementation of PRI ALT in occam
%A  Geoff Barrett,  Michael Goldsmith,  Geraint Jones,  A. Kay
%E  Charlie Askew
%B OUG\-9: Occam and the Transputer \-\- Research and Applications
%X This paper describes what we believe to be an error in the
   implementation of PRI ALT on the Inmos transputer, and
   exhibits anomalous behaviour of that implementation. A
   correct implementation of comparable complexity is
   described, and some of the properties of the construct are
   described. Finally, an attempt is made to describe
   circumstances in which the behaviour of the existing
   implementation is adequate for the correctness of a program
   which uses it.