I have never configured a large number of UMBs using ubmpci.sys, all are between 70-90K. None of the server motherboard chipsets support it. Its prompt messages are also a bit in German. Using emm386.exe also has more than 160K upper memory space. The emm386.exe in the webmaster's boot disk seems to be about 40K, and many graphical interface programs cannot execute normally, just showing some memory addresses. Such as Disk Genius(DiskMan) 2.0 Build 0229, paragon series tools. Later, using 98se's em386.exe was fine, and the function parameters are also more than the one about 40K.