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Honeywell 6000, (GE-600)
a family of 36-bit mainframe computers manufactured by Honeywell International, Inc. from 1970 to 1989 build from TTL SSI integrated circuits and ferrite core memory. They were re-badged versions of General Electric's GE-600-series originating in the 1960s as discrete transistor machines. The architecture was similar to the IBM 7090. The GE-600 aka Honeywell 6000 used 36-bit words and 18-bit addresses and had two 36-bit accumulators A and Q, eight 18-bit index registers X0 - X7, and one 8-bit exponent register to support floating point with the mantissa in both 36-bit single-precision and 2 x 36-bit double precision.

Systems were constructed of three main kinds of interconnected units, CPUs, system control units including memory, and I/O multiplexer (IOM) to connect peripherals, disk storage and tape drives.
GE-635 at Dartmouth College [1]

Selected Systems


The GE-635 as member of the GE-600 series was likely the first general purpose SMP system, though the GCOS/GECOS operating system treated the processors as a master and up to three slaves. At Dartmouth College, the GE-635 was used to develop Dartmouth Time Sharing System starting in 1965, while Multics was developed by MIT [2], General Electric and Bell Labs requiring virtual memory of the hardware advanced GE-645 [3] [4]. The Dartmouth College chess programs Dartmouth CP and Dart 4.1 ran on the GE-635.

Level 66/68

Introduced in 1975, Level 66/68 were enhanced versions of the 6000 series, running GCOS/Multics. GCOS models included the 66/05, /10, /20, /40, /60 and /80, particular models with various memory sizes, etc.. Systems could have a maximum of seven CPUs and four IOMs, the total of the two restricted to eight [5].


The Honeywell DPS8 was a descendant of the GE-645 released in 1983. The DPS8/70 is a particular model in the line [6]. Phoenix played the WCCC 1983 on such a $10 million machine.

Chess Programs

See also





External Links


  1. ^ The Dartmouth Computing Timeline - The 1960s
  2. ^ Multics - Multiplexed Information and Computing Service
  3. ^ Multics - photo and specifications
  4. ^ Edward L. Glaser, John F. Couleur, G. A. Oliver]] (1965). System Design of a Computer for Time Sharing Applications. Fall Joint Computer Conference
  5. ^ Honeywell 6000 series - Computer History Wiki
  6. ^ Honeywell DPS8 by Ed Thelen

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