 Depending on circumstances the server will occupy between about 700 to 1400 bytes of conventional memory by itself and cannot be loaded into UMBs.The DPMS server will require at least a 286 machine to run, but since DPMS-enabled software can be designed in a way so that it continues to execute in conventional memory if DPMS services are not available, the software does not need to give up compatibility with systems not providing DPMS services, either because DPMS is not loaded or not available (for example on pre-286 processors).On 386 CPUs (and higher), the DPMS server will not only provide a set of 16-bit, but also a set of 32-bit services.