Series / 1
The IBM Series / 1 computers were 16-bit mini computers introduced in 1976 as a competitor to the PDP-11 from Digital Equipment Corporation and similar devices from Data General and HP . Series / 1 computers were commonly used to control and operate external electromechanical components. There were 2 different operating systems for the Series / 1 : Event Driven Executive (EDX) or Realtime Programming System (RPS). Systems with EDX were mostly programmed using Event Driven Language (EDL), although there were also high-level languages with Fortran IV, PL / 1 , Cobol and Pascal .
The Series / 1 internally used the EBCDIC character coding and locally connected EBCDIC terminals, ASCII- based, remote terminals and devices could be connected to an RS-232 interface via an I / O card .
The production of the IBM Series / 1 computers was discontinued in the late 1980s.
Models
- Model 2 (IBM 4952)
- Model 3 (IBM 4953)
- Model 4 (IBM 4954)
- Model 5 (IBM 4955)
- Model 6 (IBM 4956)
Series / 1 applications
Series / 1 computers were used, among other things, in production at General Motors .
The United States Marine Corps was also a major customer for Series / 1. The German Federal Post continued until the late 1980s coverage Series / 1 computer as access computer for the teletext system one.
In 2016, the US Court of Auditors criticized the fact that the Series / 1 used obsolete technology for the " Strategic Automated Command and Control System " (SACCS). The SACCS coordinates the American nuclear arsenal of ICBMs and long-range bombers. As part of the modernization, the 8-inch floppy disk drives were replaced by modern SSDs in 2019 .
Individual evidence
- ↑ US nuclear weapons control upgraded from 8-inch disks to SSDs. In: heise.de. Retrieved October 21, 2019 .
- ^ Information Technology: Federal Agencies Need to Address Aging Legacy Systems. In: www.gao.gov. Retrieved May 27, 2016 .
Web links
- IBM Archives of Series / 1 with pictures (English)
- IBM 7565 with a Series / 1 (English)
- Image of a Series / 1 in the rack ( Memento from September 29, 2007 in the Internet Archive )
- IBM Series / 1 Equipment Modules Brochure in English (PDF file; 1.55 MB)