That's just another description for how the CPU is viewed by the OS. To me, it indicates you need newer hardware and current SCO. But, that vintage of Hardare and OS are perfectly compatible together, and should provide you with a great platform for learning.
PHV provided you with the correct command in his original post, it just wasn't on your PATH, which is something you should learn more about as you discover UNIX.
"Proof that there is intelligent life in Oregon. Well, Life anyway.