IBM 5250
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IBM 5250, originally, was a particular model of a terminal device sold with the IBM S/36 minicomputer system. The relationship between the terminal & system was rich: the system sent a data stream containing markup bytes indicating the boundries of data entry fields, highlighted or colored areas, and indication that the system was busy responding to the last request from the terminal. The term "5250" now refers to the content of the data stream itself: virtually no actual 5250 terminals still exist. They weigh about 80 lb (36 kg) and have robust construction. A variety of terminals and, most commonly, terminal emulation packages exist that can intepret and display 5250 data streams. The most common of these is IBM's own Client Access Express (free license to AS/400 customers) and TN5250, an open source project. The 5250 data stream definition has been refined over time to include GUI elements like pop-up windowing, check and option boxes, mouse handling, and pull-down menus.
Similar to the IBM 3270, it is a block-oriented terminal protocol, yet is incompatible with the 3270 standard.
External links
- iSeries Access (http://www-1.ibm.com/servers/eserver/iseries/access/) Current version of Client Access Express
- TN5250 (http://tn5250.sourceforge.net/)Template:Comp-stub