IBM 1800 Data Acquisition and Control System
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The IBM 1800 Data Acquisition and Control System (DACS) was a process control variant of the IBM 1130 with two extra instructions (CMP and DCM) and extra I/O capabilities. Unlike the 1130, which was a desk-like unit, the 1800 is packaged in racks which were somewhat taller than the racks used by S/360 systems of the same vintage, but the internal gates and power supplies were very much the same. Many 1800 cabinets show a distinct "ding" on the vents at the top of the chassis, where movers discovered that the door into a computer room was not quite tall enough for the 1800 cabinet.
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[edit] General
The IBM 1800 DACS consisted of: [1]
- D/A (Digital-to-Analog) Converter
- A/D (Analog-to-Digital) Converter
- IBM 1801 Processor Controller, with operator's panel
- IBM 1802 Processor Controller, with operator's panel, to include adapters for 2401/2402
- IBM 1803 Core Storage Addition
- IBM 1826 I/O Expansion Chassis (used for communications I/O, System/360 channels, 279x)
- IBM 1828 Process Expansion Unit (used for additional D/A or A/D converters, or to hold 1851 and/or 1854 multiplexors; there was an RPQ for a remote 1828 unit)
- IBM 1810 Disk (equivalent to 2310 on System/360)
- IBM 1816 Printer Keyboard (System Printer)
- IBM 1851 Reed Relay Analog Multiplexor
- IBM 1854 Solid State Analog Mulitplexor
- IBM 1894 generic model number for many 1800 RPQ hardware features, which inter alia, included support for IBM 109x data entry devices)
- IBM 1053 Printer
- IBM 1054 Paper Tape Reader Unit
- IBM 1055 Paper Tape Punch Unit
- IBM 1442 Card Reader/Punch Unit
- IBM 1443 Printer
- IBM 1627 Plotter
- IBM 2401 or 2402 Magnetic Tape Unit (its adapter included in IBM 1802)
- IBM 2311 DASD (attached via an IBM 2841 Control Unit, latter attached to a channel in the IBM 1826), the MPX operating system could map two 1810 disks per 2311, the 1810 drive mapping being seen as a DSCB Form 5 dataset to S/360 OS)
- IBM 2260 CRT (attached via an IBM 2848 Control Unit, latter attached to a channel in the IBM 1826)
(additional units being added)
[edit] Its use
The IBM 1800 systems were used mainly in the process industry plants worldwide, such as in the 1971 installtion on Blast Furnace No. 5 of Chiba Works of Kawasaki Steel Company, now part of JFE Group. [2] As of November 2008 four IBM 1800s were still in operation at the Pickering Nuclear Generating Station in Pickering, Ontario, Canada.
[edit] See also
- IBM 1710 predecessor
- IBM 7700 Data Acquisition System predecessor
- IBM System/7 sensor only successor
[edit] References
- ^ IBM Field Engineeering Announcement: IBM 1800 DACS
- ^ The Computer System on Blast Frunace No. 5 of Chiba Works, Kawasaki Steel Co., Ltd. (Kawasaki Steel Goho, Vol. 6 (1974), No. 3). See here for details.
[edit] External links
- IBM 1130.org which has significant information about the 1130 and 1800.
- Corestore.org which recently acquired an 1800 from a Canadian power plant and reports others are still in service.
- "Evolution of Small Real-Time IBM Computer Systems" (1.25 MB PDF file), from the IBM Journal of Research and Development.
- Opendragon site has two pictures of the 1800 in operation.
- IBM Archives: IBM 1800 — Process control variant of the 1130
- Bob Rosenbloom's IBM 1800 Photos
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