Hi, I can reproduce the following problem on a TT030 with both 4MB of ST and fast RAM. Whenever I do a warm start under MiNT, my fast RAM disappears. I think this has to do with the so called bugfix for TOS 4.04, where ramvalid is zapped. 1) What's the complete story behind this patch attempt? 2) And why does it screw up *my* system which has TOS 3.06? Regards, jr