Cray X-MP PPT

Hi I would like to have the various details with regards to Extended Architecture series and the I/O system of the super computer termed as Cray X-MP?

The Cray X-MP is a supercomputer composed, manufactured and sold by Cray Research. It was declared in 1982 as the "tidied up" successor to the 1975 Cray-1, and was the world's speediest PC from 1983 to 1985. The vital planner was Steve Chen.

The X-MP's fundamental change over the Cray-1 was that it was a common memory parallel vector processor, the principal such PC from Cray Research. It housed two CPUs in a centralized computer that was almost indistinguishable in outside appearance to the Cray-1.

The X-MP CPU had a speedier 9.5 nanosecond clock cycle (105 MHz), contrasted with 12.5 ns for the Cray-1A. It was worked from bipolar door cluster coordinated circuits containing 16 emitter-coupled rationale entryways each.

Extended Architecture arrangement

Cray Research declared the X-MP Extended Architecture arrangement in 1986. The EA arrangement CPU had a 8.5 ns clock cycle (117 MHz), and was worked from macrocell exhibit and entryway cluster ICs.

I/O subsystem

The Input/Output (I/O) subsystem could have two to four I/O processors with a sum of 2 to 32 circle stockpiling units.

Estimating

A 1984 X-MP/48 cost about US$15 million or more the cost of plates. In 1985 Bell Labs obtained a Cray X-MP/24 for $10.5 million alongside eight DD-49 1.2 GB drives for an extra $1 million. They got $1.5 million of exchange credit for their Cray-1.

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