11. Alto BCPL compiled into DCC machine instructions , which were in turn interpreted by Alto microcode. 12. These trace records usually represent memory references, branch outcomes, or specific machine instructions , among others. 13. The next two machine instructions of the program are: 14. Some cryptographic accelerators offer new machine instructions and can therefore be used directly by programs. 15. UUOs implemented operating system calls in a way that made them look like machine instructions . 16. Atomicity may be achieved by using a machine instruction that is able to test-and-set-lock command. 17. :There's a lower limit to how many steps it takes to execute a single machine instruction . 18. A compiler often can, by rearranging its generated machine instructions for faster execution, improve program performance. 19. To do this, much larger sections of the stack are corrupted with the no-op machine instruction . 20. The uppermost ten bits of a 48-bit Atlas machine instruction denoted which operation should be performed.