UCF CDA 5106 - Manchester Mark I and Atlas (20 pages)

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Manchester Mark I and Atlas



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Manchester Mark I and Atlas

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Pages:
20
School:
University of Central Florida
Course:
Cda 5106 - Advanced Computer Architecture

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Manchester Mark I and Atlas A Historical Perspective Presented by Aurel Cami CDA5106 Advanced Computer Architecture I Instructor Prof Euripides Montagne Introduction 1946 1976 Five computer systems at Manchester University We focus on 2 of them Mark I and Atlas University Project Industrial Derivative Manchester Mark I 1946 1949 hardware dev June 1948 first prototype 1949 enhancements Ferranti Mark I 1951 first installation 1957 last one delivered Manchester Atlas 1956 1962 hardware dev 1962 first installation Ferranti Atlas 1962 first installation 1965 last one delivered Introduction cont d Continuous advancement from Mark I to Atlas in Instruction format Operand address generation Memory management Use of high level programming languages Focus of this talk for each computer Objectives of the project Technology Architecture System software Evaluation Mark I Objectives Original objective Testing evironment for William Tubes storage Prototype Mark I Operational in June 1948 First GP stored program computer Baby Objective after the first prototype Enough memory and computing power to solve number theory problems Mark I Technology Logic Fast Storage Registers William Tubes RAM William Tubes Backing Storage EF50 EF55 pentodes EA50 vacuum tube diodes Drum 30 msec revolution time I O devices Input 5 track paper tape reader Output tape and printer Mark I Architecture Serial ALU single address computer Hardware add subtract multiply and logic Word length 32 bits in 1949 40 bits Accumulator register 80 bits 2 words 2 B lines index registers 20 bits each Instruction length 20 bits 2 instructions per word Instruction Set 26 op codes in 1949 RAM 128 words Drum Memory 1024 words Mark I Architecture cont d ADDRESS B 10 3 1 6 Instruction Format FUNCTION Address 10 bits B line 3 bits Function op code 6 bits Operands 40 bit words Transfer to from drum peripheral devices through control words of two kinds a Drum transfers control word Mark I Architecture cont d Paging RAM 8 pages on



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