I had one sun ultra enterprise1 cpu.
it's not giving any disply,which operating system it's support.
How can install os on this CPU.
That's a pretty old server, but you'd probably get away with Solaris 2.6 on there.
BTW, please don't call it a CPU, call it a computer, server, box, whatever, but not a CPU.
The CPU is the little chip in there that does most of (but not all) the work.
yeah yeah unix pls have more respect call it a box. But wintel servers you can call them CPUS or whatever you like except a box 
For your ultra1 box does it come with any graphic card?
You can use old CRT monitors with analog, flatscreen lcd monitors use digital signals will not work(unless they also support analog)