DTA: Tech Notes
Tech Notes
Modes
PGA and PGL640 Emulation
Modes
Colors Color
Compatibility Resolution On-Screen Palette Monitor(s)
CGA 40/80 text 16 16 All
CGA 320 x 200 4 4 All
CGA 640 x 200 2 2 All
EGA 40/80 text 16 64 All
EGA 320 x 200 16 64 All
EGA 640 x 200 16 64 All
EGA 640 x 350 16 64 All
EGA+ 1 640 x 480 16 64 All
EGA+ 1 132-col. text 16 64 All
PGL 640 x 480 3 16/256 2 16.7 million Plus, XL
PGL & DGIS 960 x 720 16/256 2 16.7 million Plus, XL
PGL & DGIS 1024 x 768 16/256 2 16.7 million XL
1. Requires drivers, supplied with MVA 1024 for selected applications.
2. 256 with optional video RAM expansion kit installed.
3. The 640 x 480 PGL mode does not fill the screen on the MultiSync Plus or XL. Refer to "PGA and PGL640 Emulation."
PGA and PGL640 Emulation
Some software compatible with the IBM� PGController assumes that the maximum screen dimensions are no larger than the 640 x 480 pixel resolution of the IBM PGC. Such applications, when run on the MVA 1024 with the MultiSync Plus or XL, display in the lower-left portion of the 960 x 720 or 1024 x 768 PGL screens. The pgl640.exe program on the MVA 1024 Utilities disk allows these programs to be displayed centered on the screen, but they will remain reduced in size (62% on the XL and 66% on the Plus). The smaller size is due to the MVA 1024 using the same pixel clock for the 640 x 480 resolution PGC emulation as for the high-resolution PGL modes.
NOTE: Not all PGC programs will require this.
To use pgl640.exe, type:
PGL640 < RETURN>
at the DOS prompt after loading the PGL in 4- or 8-bit mode with the MVA Utility. The MVA 1024 installation program described above automatically copies pgl640.exe to the \ mva1024 subdirectory. The application will run as a window centered on the screen under the PGC emulation.
Type:
pglhires <RETURN>
or run the MVA Utility again to reenable the high-resolution PGL modes.
Self-Test
The MVA 1024 has a self-test that runs until either PGL or DGIS is loaded. To view the self-test press <ALT-ESC>. The diagnostic pattern consists of a continuously changing pattern of colors. Pressing <ALT-ESC> again exits the self-test and returns to the application.
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