First PA-RISC SMP - HP 9000 870 servers

HP 9000 870 Emerald were the first PA-RISC multiprocessor (SMP) system released by HP, in 1991. 870S were hosted in a large cabinet with up to four 50 MHz PCX for around half a million US dollars, positioned against IBM mainframe transaction computers. HP claimed four times the performance of the previous high-end HP 9000 model. HP added SMP support to PA-RISC and HP 9000 since that offer[ed] the…