Atlas - Revision history

Jnc: /* External links */ +manuals and captioned images for Atlas computers

2025-01-21T05:17:36Z

‎External links: +manuals and captioned images for Atlas computers

Jnc: /* External links */ Describe main CCH page

2024-02-24T13:27:35Z

‎External links: Describe main CCH page

Jnc: /* External links */ +Computing History page

2024-02-23T12:26:19Z

‎External links: +Computing History page

Jnc: 3 built in total; fastest until Stretch

2024-01-08T13:47:57Z

3 built in total; fastest until Stretch

Jnc: +New cat

2023-12-21T22:01:02Z

+New cat

Jnc: Expand details; update links

2022-10-31T15:59:19Z

Expand details; update links

Jnc: Stubby, but a start

2018-11-18T15:14:04Z

Stubby, but a start

New page

'''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-[[bit]] [[word]]s of [[core memory]], and it was allied with 96K words of [[drum]] in four [[drive]]s; its [[address space]] was 21 bits.

==External links==

* [http://www.eecs.harvard.edu/~margo/cs261/notes/kilburn-1961.htm One-Level Storage System]

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[[Category: Mainframes]]

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 * [http://classweb.ece.umd.edu/enee447/atlas.pdf One-Level Storage System]
 * [https://www.computinghistory.org.uk/det/1080/Ferranti-Atlas-Computer/ Ferranti Atlas Computer] - contains links to many other objects at the bottom
 [[Category: Early Computers]]
 [[Category: Mainframes]]

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 * Raúl Rojas, Ulf Hashagen, ''The First Computers: History and Architectures''; Frank H. Sumner, "The Atlas Computer"
 ==External links==
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 * [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]
-* [https://www.computinghistory.org.uk/det/1080/Ferranti-Atlas-Computer/ Ferranti Atlas Computer]
+* [https://www.computinghistory.org.uk/det/1080/Ferranti-Atlas-Computer/ Ferranti Atlas Computer] - contains links to many other objects at the bottom
 [[Category: Early Computers]]
 [[Category: Mainframes]]

@@ Line 13: / Line 13: @@
 * [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]
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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 was, for two years in the early 1960s, the most powerful computer in the world, before the advnt of the [[IBM 7030 Stretch]]. It is notable for being the first computer to have [[virtual memory]] (called 'one-level store').
 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==

← Older revision		Revision as of 22:01, 21 December 2023
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		+	[[Category: Early Computers]]
	[[Category: Mainframes]]		[[Category: Mainframes]]