 The station featured upgraded computers and solar arrays, and accommodations for two cosmonauts each having their own cabin.A total of six docking ports were available on the Mir Core Module, which were used for space station modules and visiting spacecraft – the docking sphere design had been upgraded from its initial Salyut design to contain a maximum of five docking ports (front, port, starboard, zenith and nadir).And finally, the modules for "Mir" were derived from the Functional Cargo Block design of the Almaz programme.