Browse Prior Art Database

Display Function Identification

IP.com Disclosure Number: IPCOM000060878D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Stockwell, DA: AUTHOR

Abstract

A mechanism is required to determine if certain functional capabilities exist in a workstation in order to run or terminate cleanly. For example, is color text supported in 1 or 4 pages, or is IBM 3278/3279 full screen supported. A basic input/output system (BIOS) call provides this mechanism. In addition, a means is provided to identify the type of monitor attached and the level of the display adapter via a display identifier (ID). The mechanism can be easily extended to include other hardware and software functions (GPI, VDI, Control Program Level, Communication Adapters, etc.). An application program does a function call to a BIOS video routine. (Image Omitted) The application program reads the monitor ID byte to determine which display features are installed, and whether acolor or monochrome monitor is installed.

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Display Function Identification

A mechanism is required to determine if certain functional capabilities exist in a workstation in order to run or terminate cleanly. For example, is color text supported in 1 or 4 pages, or is IBM 3278/3279 full screen supported. A basic input/output system (BIOS) call provides this mechanism. In addition, a means is provided to identify the type of monitor attached and the level of the display adapter via a display identifier (ID). The mechanism can be easily extended to include other hardware and software functions (GPI, VDI, Control Program Level, Communication Adapters, etc.). An application program does a function call to a BIOS video routine.

(Image Omitted)

The application program reads the monitor ID byte to determine which display features are installed, and whether acolor or monochrome monitor is installed. The application program also tests for the adapter ID. If the adapter ID is equal to a predetermined value, enhanced function is present. To determine which display adapter is installed, read the display ID byte in the table above; to determine which functions are installed, read the function bytes in the table. Each display adapter ROS will be required to place the monitor ID, its own display adapter ID and appropriate function information into the table. The aspect values are the ratio of the pels in the X and Ydirections multiplied by the physical dimensions of the active area of the screen.

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