2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47348A set of FORTRAN routines to perform a fast simulation of a HERA--like detector including the smearing of the $z$ coordinate of the interaction vertex, the simulation of a tracker system, of an electromagnetic and of a hadronic calorimeter is presented.4 pages, Latex with a41.sty (included). To appear in the Proceedings of the 1997 Workshop on physics with polarized protons at HERAHigh Energy Physics - Phenomenologytext