Atlas: Difference between revisions
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'''Atlas''' was a [[mainframe]] computer built by a consortium of the University of Manchester, [[Ferranti]], and [[Plessey]]. It is notable for being the first computer to have [[virtual memory]] (called 'one-level store'). | '''Atlas''' was a [[mainframe]] computer built by a consortium of the University of Manchester, [[Ferranti]], and [[Plessey]]. It is notable for being the first computer to have [[virtual memory]] (called 'one-level store'). | ||
Its [[main memory]] consisted of 16K 48- | Its [[address]]es were 24 bits, in 48-[[bit]] [[instruction]]s; the [[address space]] allocated to [[main memory]] was 20 bits. Its main memory initially consisted of 16K 48-bit [[word]]s of [[core memory]], which was allied with 96K words of [[drum]] in four [[drive]]s. | ||
==Further reading== | |||
* Raúl Rojas, Ulf Hashagen, ''The First Computers: History and Architectures''; Frank H. Sumner, "The Atlas Computer" | |||
==External links== | ==External links== | ||
* [ | * [https://www.andrew.cmu.edu/course/15-749/READINGS/optional/fotheringham61.pdf Dynamic Storage Allocation in the Atlas Computer] | ||
* [http://classweb.ece.umd.edu/enee447/atlas.pdf One-Level Storage System] | |||
{{semi-stub}} | {{semi-stub}} | ||
[[Category: Mainframes]] | [[Category: Mainframes]] | ||
Revision as of 15:59, 31 October 2022
Atlas was a mainframe computer built by a consortium of the University of Manchester, Ferranti, and Plessey. It is notable for being the first computer to have virtual memory (called 'one-level store').
Its addresses were 24 bits, in 48-bit instructions; the address space allocated to main memory was 20 bits. Its main memory initially consisted of 16K 48-bit words of core memory, which was allied with 96K words of drum in four drives.
Further reading
- Raúl Rojas, Ulf Hashagen, The First Computers: History and Architectures; Frank H. Sumner, "The Atlas Computer"
