High Quality Content by WIKIPEDIA articles! The ILLIAC II was a revolutionary super-computer built by the University of Illinois that became operational in 1962. The concept, proposed in 1958, pioneered ECL circuitry, pipelining, and transistor memory with a design goal of 100x speedup compared to ILLIAC I. ILLIAC II had 8192 words of core memory, backed up by 65,536 words of storage on magnetic drums. The core memory access time was 1.8 to 2 µs. The magnetic drum access time was 7 µs. A "fast buffer" was also provided for storage of short loops and intermediate results (similar in concept to what is now called cache). The "fast buffer" access time was 0.25 µs.

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