Bug Report

CWSDPMI 4MB page incompatibility

Summary:

Known limitations with 4MB pages:
 1) 4Mb regions are treated as locked (non-pageable).  Virtual memory may be
    less effective.
 2) DPMI 1.0 extensions to manage page attributes will not work on 4MB pages.
 3) DPMI function 0x503 to resize memory is not supported if it requires the
    memory zone to be moved in physical memory and it contains a 4Mb page.

Workarounds:

Use CWSPARAM bit 3, (bitmask 8) to suppress using 4Mb pages.