This switch is undocumented because it works only on very specific configurations. The amount of memory must be contiguous. Microsoft has not committed to keeping the switch in any future releases of Windows.
This example forces Windows NT to use only 12 MB of RAM, ignoring everything else above this. This switch may be valuable in troubleshooting parity errors, mismatched SIMM speeds, or other memory related problems.
multi(0)disk(0)rdisk(0)partition(1)\winnt="Windows NT" /MAXMEM=12
Please note that you should never set the value of /maxmem to be less than 8, or Windows NT may not boot reliably. This switch is valid only on the x86 architectures, and is not available on the MIPS or Alpha platforms.
In Windows 2000 Professional, do not set /maxmem lower than 64 MB. In Windows 2000 Server and Windows 2000 Advanced Server, do not set /maxmem lower than 128 MB. In Microsoft Windows Server 2003, do not set /maxmem lower then 1024 MB. In other operating systems, check the minimum system requirements before you set /maxmem.