You should have already installed the Windows display drivers which are found on the floppy disk marked "Display Drivers" that came with your Macintosh DOS Compatible computer. If you have not, refer to page 39 of the "DOS Compatibility Card for Macintosh User's Guide," under the heading, Installing video drivers.
For 800x600 resolution at 16 colors on a 15-inch or 17-inch display, you should select the "* CHIPS 450 VGA 800x600 16 color" driver in the windows SETUP program. In the Macintosh environment, select the 832x624 resolution in the Monitors control panel. In the PC Setup control panel, under the display heading, select VGA or 16-inch. These selections will give you different results, so try both and use the one that works best for you.
The DOS Compatibility Card has 512K of video RAM. Therefore, 640x480 at 16 or 256 colors, or 800x600 at 16 colors are the only supported resolution and color depth combinations.
Support Information Services