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Vintage dave (talk | contribs) m (Don't imply that A/B/C could go 30MHz) |
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Type 53K/54K was [[introduced in 1955|introduced in March 1955]] along with the [[541]]/[[545]]. | Type 53K/54K was [[introduced in 1955|introduced in March 1955]] along with the [[541]]/[[545]]. | ||
At that time, it was the only plug-in that could utilize the new mainframes' speed; | At that time, it was the only plug-in that could utilize more than half of the new mainframes' speed; | ||
the | the [[A|Type A]], [[B|Type B]], and [[C|Type C]] upgrades weren't ready until August 1956. | ||
In August 1955, just five months after introduction, it was renamed Type 53/54K, | In August 1955, just five months after introduction, it was renamed Type 53/54K, | ||
and in 1959, when the 541A/545A mainframes came out, it got its final name, Type K. | and in 1959, when the 541A/545A mainframes came out, it got its final name, Type K. | ||