IBM System/360,
a 32-bit mainframe computer system family announced by IBM's 2nd president, Thomas Watson, Jr. on April 7, 1964, and delivered between 1965 and 1978. The chief architect of System/360 was Gene Amdahl, the project was managed by Fred Brooks.
Early 360 models used Solid Logic Technology. The 360/195 (1971) had ECLintegrated circuits for the arithmetic and logic operations in the central processor combined with the 32 KiB high speed buffer memory. Each silicon memory chip was about 0.125 inches square and consisted of 664 transistors and diodes etc. Each memory chip stored 64 bits of data. Two memory chips were mounted on a 0.5 inch ceramic substrate [2]. A typical 360/195 configuration would be a single CPU with 2 MiB core memory, an operator's console with a cathode-ray tube (CRT) display for diagnostics and operator control [3].
Architecture
The System/360 had a pipelined architecture with 16 32-bit general-purpose registers, four 64-bit floating-point registers, and 24-bit (16 MiB) byte-addressable interleaved memory of Big-endian byte/word order. Most models used microcode to implement the instruction set. Machine instructions had operators with operands, which could contain register numbers or memory addresses. Binary arithmetic and logical operations are performed as register-to-register and as memory-to-register/register-to-memory as a standard feature, and had 4-bit nibble , 8-bit byte, 16-bit halfword, 32-bit word , 64-bit double word or 128-bit quad word memory operands, or even 2048 byte storage blocks [4]. Five separate units allowed the 360/195 to overlap and process up to seven different operations at the same time. The floating-point unit could handle up to two additions and a multiplication at one time.
^ Installation of the IBM 360/91 in the Columbia Computer Center machine room in February or March 1969. Photo: AIS archive, The IBM 360/91 - Columbia University
a 32-bit mainframe computer system family announced by IBM's 2nd president, Thomas Watson, Jr. on April 7, 1964, and delivered between 1965 and 1978. The chief architect of System/360 was Gene Amdahl, the project was managed by Fred Brooks.
Table of Contents
Technology
Early 360 models used Solid Logic Technology. The 360/195 (1971) had ECL integrated circuits for the arithmetic and logic operations in the central processor combined with the 32 KiB high speed buffer memory. Each silicon memory chip was about 0.125 inches square and consisted of 664 transistors and diodes etc. Each memory chip stored 64 bits of data. Two memory chips were mounted on a 0.5 inch ceramic substrate [2]. A typical 360/195 configuration would be a single CPU with 2 MiB core memory, an operator's console with a cathode-ray tube (CRT) display for diagnostics and operator control [3].Architecture
The System/360 had a pipelined architecture with 16 32-bit general-purpose registers, four 64-bit floating-point registers, and 24-bit (16 MiB) byte-addressable interleaved memory of Big-endian byte/word order. Most models used microcode to implement the instruction set. Machine instructions had operators with operands, which could contain register numbers or memory addresses. Binary arithmetic and logical operations are performed as register-to-register and as memory-to-register/register-to-memory as a standard feature, and had 4-bit nibble , 8-bit byte, 16-bit halfword, 32-bit word , 64-bit double word or 128-bit quad word memory operands, or even 2048 byte storage blocks [4]. Five separate units allowed the 360/195 to overlap and process up to seven different operations at the same time. The floating-point unit could handle up to two additions and a multiplication at one time.Photos
The machine ran J. Biit at ACM 1970, and CCCP at ACM 1971 [6] [7]
Chess Programs
See also
Selected Publications
External Links
IBM System/360
History of IBM - 1960–1968: The System/360 era
IBM System/360 architecture
IBM System/360 Model 67
IBM Archives: Mainframes introduction 2
IBM Archives: System/360 Model 91
Inside System/360 from The Computer History Museum
Peripheral
Operating Systems
Assembly
Misc
References
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