【Mitsubishi Electric】 MELCOM EX830, EX840, EX850, EX860, EX870, EX880

The EX830 and EX840 increased speed by using high-speed and high-density ECL-LSI with a gate delay time of 0.5ns and 6,000 gates, and high-speed ECL-RAM with an access time of 7ns. With a footprint of 1 square meter and size of 1 cubic meter, they achieved a revolutionary reduction in set-up space for a general-purpose computer. The EX850 was a dual processor system which could be configured simply by adding an expansion processor stand cabnet to the EX840

The EX860, EX870 and EX880 were higher-end machines which used high-speed and high-density ECL-LSI with a gate delay time of 0.4ns and 2,500 gates, and high-speed ECL-RAM with an access time of 5ns. Set-up space was designed to be the same as models such as the EX830, and this made it easy to upgrade the main unit at the customer's site. In the EX880, a dyadic processor configuration was achieved by tightly coupling two basic processing units, and system availability was improved because even if one basic processing unit failed,the system could operate by isolating the failed processor.

GOS/VS was developed as the operating system for the EX Series. Its features included: larger system scale, improved system processing capacity based on dual processor support and optimization of resource use, larger storage capacity due (for example) to support for high-capacity magnetic disk units, and ease of system construction due to the use of a common command procedure function for TSS and batch processing, and an operation procedure function for simplifying system management and operation

*Processing performance is given as the ratio against the EX830.