UMS II - Enhancements/Amendments. UMS II - Memory Requirements. UMS II requires 1 megabyte of RAM on both the Atari ST and Commodore Amiga home computer systems. The P.C version requires 512K of memory and the more that is available then the faster the program will run. If UMS II seems to be taking an excessive amount of time to run then it is advisable to remove any memory resident programs or utilities that are installed when you boot up your machine, this will free up more memory allowing the program to run faster. The PC version will run in EGA and CGA graphics modes. All versions are hard disk installable as stated in the manual. UmsII runs on Dos Versions 2.11 upwards. UMS II - Running from floppy disk. If you are running UMS II from floppy drive then you must ensure that you back up the necessary files for the original scenario that you wish to run from the disk supplied. Use one disk for each scenario. The files for each scenario are as follows. Operation Overlord. Overlord.DAT Overlord.IND Overlord.GEN Overlord.MCP Shaef.EGA Shaef.CGA OKW.CGA OKW.EGA Ums2end.EGA Ums2end.CGA The Napoleonic Wars. Napoleon.DAT Napoleon.IND Napoleon.GEN Napoleon.MCP Nappic.EGA Nappic.CGA Ukpic.EGA Ukpic.CGA Ums2end.EGA Ums2end.CGA Alexander the Great. Alex.DAT Alex.IND Alex.GEN Alex.MCP Alex.EGA Alex.CGA Ums2end.EGA Ums2end.CGA The ST picture files have the extension .Gif or Pi2 and on the ST you need to copy these.