Hi, Some progress made. This is truly blank system. 7| Watch Modules space (bytes) 47296 9 % Heap speace 0 0 % Disk sectors 1 0 % Switches: swi0 = 0 , swi1 = 1 Time 285507~ On the board sw1 is on, while sw0 is off, is this a typo in Oberon0 code? -- Tomas Kral <thomas.kral at email.cz>