IBM Graphical Data Display Manager (GDDM)

IBM Graphical Data Display Manager (GDDM)

GDDM (Graphical Data Display Manager) is a computer graphics system for the IBM System/370 which was developed in IBM's Hursley lab, and first released in 1979. GDDM was originally designed to provide programming support for the IBM 3279 colour display terminal and the associated 3287 colour printer. The 3279 was the first colour graphics terminal that could be used in a general business environment.

GDDM was extended in the early 1980s to provide graphics support for all of IBM's display terminals and printers, and ran on all of IBM's mainframe operating systems.

GDDM also provided support for the (then current) international standards for interactive computer graphics: GKS and PHIGS. Both GKS and PHIGS were designed around the requirements of CAD systems.

When IBM and Microsoft began collaborating on the design of OS/2 in 1986 the Graphics Presentation Interface (GPI) which was the graphics API in Presentation Manager was based on IBM's GDDM and the Graphics Control Program (GCP). GCP was originally developed in Hursley for the 3270/PC-G and 3270/PC-GX terminals.

The GPI was used as the primary graphics API for the OS/2 operating system.

At the time (1980s), the graphical user interface (GUI) was still in its early stages of popularity, but already it was clear that the foundation of a good GUI was a graphics API with strong "real-time interactive" capabilities. Unfortunately, the design of GDDM was closer to (at the time) traditional graphics APIs like GKS, which made it unsuited for more than the simplest interactive uses.

Microsoft and IBM went their separate ways in 1991. Microsoft continued development of its Windows operating environment with Graphics Device Interface (GDI) graphics API. IBM continued with OS/2 for several more years.

External links

* [http://www.ibm.com/software/applications/gddm/about/index.html IBM's GDDM page] , including links to on-line documentation.
* [http://www-03.ibm.com/ibm/history/history/year_1979.html announcement of 3279 and 3287.]

References

* Charles Petzold, " Programming the OS/2 Presentation Manager", Microsoft Press, 1989. ISBN 1-55615-170-5.


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