22 Mar
2007
22 Mar
'07
6:51 a.m.
The Burroughs B5000/6000/7000 series mainframes used
crossbar switches to
interconnect CPUs with memory and I/O processors. These machines were
introduced in 1961 or thereabouts.
The relevant document is the B 5220 Central Control Technical Manual, orig
issued in 1964 which discusses the crossbar:
http://bitsavers.org/pdf/burroughs/B5000_5500_5700/B5220.51_CentralControl_…
page 111 or so..