The GE 645 mainframe computer was a development of the GE 635 for use in the Multics project. This was the first computer that implemented a configurable hardware protected memory system. It was designed to satisfy the requirements of Project MAC to develop a platform that would host their proposed next generation time-sharing operating system (Multics) and to meet the requirements of a theorized computer utility.[1] The system was the first truly symmetric multiprocessing machine to use virtual memory, it was also among the first machines to implement what is now known as a translation lookaside buffer,[2][3][4] the foundational patent for which was granted to John Couleur and Edward Glaser.[5]
General Electric initially publicly announced the GE 645 at the Fall Joint Computer Conference[1][3] in November 1965. At a subsequent press conference in December[6][7] of that year it was announced that they would be working towards "broad commercial availability"[8] of the system. However they would subsequently withdraw it from active marketing at the end of 1966.[8] In total at least 6 sites ran GE 645 systems in the period from 1967 to 1975.[9]
^ abCorbató, F. J.; Vyssotsky, V. A. (30 November 1965). "Introduction and overview of the multics system". Proceedings of the November 30--December 1, 1965, fall joint computer conference, Part I on XX - AFIPS '65 (Fall, part I). Association for Computing Machinery. pp. 185–196. doi:10.1145/1463891.1463912. ISBN 9781450378857. S2CID 11197018.
^John Couleur (Winter 1995). "The Core of the Black Canyon Computer Corporation" (PDF). IEEE Annals of the History of Computing. 17 (4): 56–60. doi:10.1109/85.477436.
^ abCite error: The named reference Glaser was invoked but never defined (see the help page).
^Cite error: The named reference LSB0468 was invoked but never defined (see the help page).
^US patent 3412382, COULEUR JOHN F & GLASER EDWARD L, "Shared-access data processing system", assigned to Massachusetts Institute of Technology
^Smith, William D. (2 December 1965). "A New Computer Developed at G.E." The New York Times. Retrieved 20 October 2023.
^"GE-645 Timesharing System". Digital Computer Journal. 18 (2). Office of Naval Research - Mathematics Science Division: 5–6. 1966.
^ ab"US vs IBM_Exhibit 14971 - Historical Narrative The 1960's" (PDF). pp. 434, 510. Retrieved 21 October 2023.
^"Multics Site Timeline". multicians.org. Retrieved 21 October 2023.
The GE645 mainframe computer was a development of the GE 635 for use in the Multics project. This was the first computer that implemented a configurable...
1964 to 1969, GE and Bell Laboratories (which soon dropped out) joined with MIT to develop the Multics operating system on the GE645 mainframe computer...
developing an experimental time-sharing operating system called Multics for the GE-645 mainframe. Multics introduced many innovations, but also had many problems...
was developed on the GE645 computer, which was specially designed for it; the first one was delivered to MIT in January 1967. GE offered their earlier...
page table in main memory for mapping, the IBM System/360 Model 67 and the GE645, both had a small associative memory as a cache for accesses to the in-memory...
GE-635 and GE-645, although GECOS on multiprocessor GE-635 systems ran in a master-slave asymmetric fashion, unlike Multics on multiprocessor GE-645 systems...
necessary code into its own memory and then initialized the other PPs. The GE645 (c. 1965) had a "SYSTEM BOOTLOAD" button that, when pressed, caused one...
MTS, TSS/360 and CP/CMS for the IBM System/360 Model 67 Multics for the GE645 The Time Sharing Operating System for the RCA Spectra 70/46 During the 1960s...
Electric were developing Multics, a time-sharing operating system for the GE645 mainframe computer. Multics featured several innovations, but also presented...
set Host platform Assembly Language for Multics (ALM) Yes MIT GE-645 Honeywell 6180 GE-645 Honeywell 6180 705 Autocoder IBM Free IBM 705 1410/7010 OS Autocoder...
Operating System) Livermore Time Sharing System (LTSS) Multics (MIT, GE, Bell Labs for the GE-645) (announced) Pick operating system SIPROS 66 (Simultaneous Processing...
Unisys ClearPath Libra servers.[citation needed] The GE645 computer, a modification of the GE-635 with segmentation and paging support added, was designed...
(1967), the RCA 70/46 and the Time Sharing Operating System (1967), the GE645 and Multics (1969), and the PDP-10 with added BBN-designed paging hardware...
operating systems. The GE645 mainframe computer did have some hardware access control, including the same two modes that the other GE-600 series machines...
architecture series used different approaches. Some systems, such as the GE645 and its successors, used both segmentation and paging. The table of segments...
per cylinder. Like the Winton 201A, the EMD 645 and the EMD 710, the EMD 567 is a two-stroke engine. GE now makes EMD-compatible replacement parts. Eugene...
rebranded GeForce GT 440 (GDDR5). The GeForce GT 640 (OEM) GF116 card is a rebranded GeForce GT 545 (DDR3). The GeForce GT 645 (OEM) card is a rebranded GeForce...
589–602 (1965) ― virtual memory requirements for Project MAC, destined for GE645 C. A. R. Hoare and R. H. Perrott, Eds., Operating Systems Techniques, Academic...
for important historical systems, including: Atlas Computer (Manchester), GE645, Burroughs B5000. In the mid-1960s, IBM's Cambridge Scientific Center developed...
but is more modest than that of the IBM 360/67 [Arden et al., 1966] and GE645 [Dennis, 1965; Daley and Dennis, 1968]. A number of instructions are apparently...
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