at which translated target instruction are stored the prologue process will indicate a failure when its test is conducted so that the link to the next translation will not be executed at that point the code morphine software may roll back execution to the last consistent point from which some other method for executing the target instructions may take place in one embodiment of the invention the process shown in fig3 for accomplishing the check utilizes the eip value designating the next target instruction and the code segment base to determine the virtual address pointed to by the eip value determines the physical address of the target instruction by a lookup and then compares this physical address with the physical address of the target instruction stored for the translation if the addresses are the same the linked translation is executed if the addresses differ an exception is generated and execution is rolled back to the last point at which consistent state existed and some other method of executing the target instruction is undertaken at that point the succeeding translation can be invalidated and another translation or an interpretation of the target instructions can be undertaken alternatively the succeeding translation may remain valid but its link to the preceding translation broken so that the first translation no longer proceeds directly to the second the need.