Some non-IBM PC-ATs have BIOS problems which interfere with extended memory
usage.  Run CK-AT, on this diskette, to validate your system's INT 15 logic.
If your system fails this test, insist that your supplier correct the problem!

Even if validation is successful, your BIOS may have IBM incompatible BIOS
shutdown logic which will crash the system when running CACHE-AT; if so, you
may circumvent this problem by including a "/W" on the CACHE-AT start-up
command line (e.g., CACHE-AT /W).