1) If i am not mistaken, high-order bits are used to begin commands, tho the low-order bits are still used in these commands... But the thing i dont understand is this....i am told that low-order bits are used to store data, can anyone explain exactly how this works or if i am mistaken, try to explain how it works, i am a little lost. 2) What is the difference between the CPU "codebook" and the CPU instruction set?