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IBM 8514/A Display Adapter Information |
The information in this document applies to:
WordPerfect® 5.1 for DOS
Problem
Solutions: IBM 8514/A Information (from PC Magazine Vol. 7 No. 13 July 1988) The 8514/A Display Adapter, 8514 Memory Expansion Kit, and 8514 Color Display comprise IBM's high-end graphics video system for the PS/2 Models 50, 60, and 80. The maximum resolution is 1,024 by 768 with 256 colors selected from 262,144. The 8514/A also contains a graphics co-processor that speeds up the drawing operation. The 8514/A consists of two sandwiched boards that occupy a special slot in the PS/2 Micro Channel architecture bus. Although you can use any PS/2 monitor with the 8514/A, you need the 8514 Color Display for the 1,024 by 768 resolution. Memory and Modes The 8514/A comes with 512K of video buffer memory, organized in four color planes of 128K each. This gives you 16 simultaneous colors. The 8514 Memory Expansion Kit increases the on-board memory to 1M. The extra memory adds four more color planes, for 256 simultaneous colors. (One megabyte is enough for a resolution of 1024x1024, with eight color planes; the 8514 can use the extra memory for storing fonts and bitmaps.) The 8514/A supports only four graphics modes: a 640x480 mode and three 1024x768 modes (each using a different font size). They are called the "advanced function" graphics modes. In the 1024x768 mode, the display is interlaced but at a fairly high frame rate of 43 Hz. Flickering is not noticeable. The 8514/A occupies a special bus slot with an additional connector that supplies video signals from the PS/2 system-board VGA to the 8514/A board. When the 8514/A is not in an advanced-function mode, it simply routes the video signals to the monitor attached to the adapter. Thus, the 8514/A does not replace the VGA but works in conjunction with it. You still have all the CGA, EGA, and VGA video modes supported by the VGA without any special VGA hardware on the 8514/A. You can also use the 8514/A with two monitors. One monitor (usually the 8514 Color Display) is attached to the 8514/A adapter; the other (presumably one of IBM's other PS/2 color monitors) is connected to the VGA on the system board. For all the VGA video modes (including the CGA and EGA compatibility modes), both monitors show the VGA output. But when the 8514/A is switched into an advanced-function mode, the two adapters work independently. The 1M of video buffer memory in the 8514/A is not directly addressable by the PC's microprocessor. Instead it is used by the graphics co-processor on the board for performing high-level functions such as drawing lines, filled areas, and text. (The information below is NOT from PC Magazine) Running the 8514/A with WordPerfect To use the 8514/A with WordPerfect, the user must first (one time only) run the Setup Program and specify the amount of memory that is on the 8514/A Display Card. This does NOT mean system RAM. It is VRAM installed on the video card itself. There is an INSTALL program that installs the HDILOAD software to a directory called HDIPCDOS, installs the HDILOAD statement in the AUTOEXEC.BAT and allows the user to select the language which they wish to display in. The default is US. This must be run so that the video system will initialize on boot-up. In WP the user should select IBM 8514/A from the list of Graphics Screen Types in Setup. WP uses both the information from the Setup program as well as information from HDILOAD to operate the video system correctly. If the board has been upgraded with the additional memory option, a jumper must be set on the video board. If the 8514/A board is installed in a PS/2 50, it must be installed into Slot 3. |
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