Micro Channel architecture was publicly introduced at the launch of the PS/2 range in 1987, with three out of four of the new machines featuring it.Models 50, 60 and 80 - the Model 30 was ISA IBM had actually discreetly introduced the Micro Channel architecture in October 1986, half a year before the introduction of the IBM PS/2, as part of their "Gearbox" Industrial Computer 7552 series. These computers were rack-mountable, ruggedized, modular industrial PCs. They featured a hybrid 16-bit MCA and ISA bus, with certain ISA signal lines disabled.
Micro Channel architecture was publicly introduced at the launch of the PS/2 range in 1987, with three out of four of the new machines featuring it.Models 50, 60 and 80 - the Model 30 was ISA IBM had actually discreetly introduced the Micro Channel architecture in October 1986, half a year. befo,re the introduction of the IBM PS/2, as part of their "Gearbox" Industrial Computer 7552 series. These computers were rack-mountable, ruggedized, modular industrial PCs. They featured a hybrid 16-bit MCA and ISA bus, with certain ISA signal lines disabled.