Try an extra memory tweak

If you have a VGA display, you may be able to increase the amount of upper memory space by instructing MemMaker to include the monochrome display region (B000h to B7FFh) in its search for available UMB space. If you run Windows, and you’re using this region as UMB space, you need to add a device line for the MONOUMB.386 driver to the [386Enh] section of SYSTEM.INI so that Windows knows what you’re up to. DEVICE=C:\DOS\MONOUMB.386

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