Make move from SR privileged

src/m68k.rs

@@ -540,6 +540,10 @@ impl M68K {
                 self.write_effective(dst, u32::from(self.sr & 0xFF), Size::Word)?;
             }
             Instruction::MoveFromSr(dst) => {
+                if !self.is_supervisor() {
+                    self.trap(8)?;
+                    return Err(InsExecError::AbnormalTrap);
+                }
                 self.write_effective(dst, u32::from(self.sr), Size::Word)?;
             }
             Instruction::MoveToCcr(src) => {