Need a terminal emulator.

A vt100 and a vt220 are terminals. Are you wanting to connect them to your Mac or are you wanting to emulate vt terminals on your Mac, connecting to another computer?

Have you looked at the Terminal app in /Applications/Utilities/?

Where can I get a terminal emulator that will connect to vt100, and vt220? I use multiview in windows, and i need somthing compatible with OSX.

Applicaitons -> Utilities -> Terminal ??

If you do not like the provided Terminal, then how about iTerm
<http://iterm.sourceforge.net/>

And if you perfer xterm, then fire up Applications -> Utilities -> X11

The X11 environment can also use other X-Windows based terminal emulators such as rxvt, and different xterm implementations. You would be responsible for getting these emulators onto your Mac.

In the future you may want to take Unix and Terminal specific questions over to the Mac OS X Technologies > Unix Forum
<http://discussions.apple.com/forum.jspa?forumID=735>

I am looking just to emulate one.

That is what Applications -> Utilities -> Terminal is. A terminal emultor.

I also need to be able to define keyboard mapping as we use non standard key layouts.

You can do some key mapping via Terminal -> Preferences -> Settings -> Keyboad.

How would i load a windows based terminal emulator while using OSX like you mention?

No one said anything about loading a Windows based terminal emulator. Everyone has been say you just launch Applications -> Utilities -> Terminal, and you have a terminal emulator.

If you really want a Windows based terminal emulator, then you would need to either find a vendor that offers both a Windows and Mac version of their terminal emulator, or you would need to run Windows in a Virtual Machine, such as VMware Fusion, Parallels, or VirtualBox. But it seems to me that is over kill since Mac OS X does provide a terminal emulator.

And if you do not like the Mac OS X provided Terminal application, you can download iTerm which is another free terminal emulator.
<http://iterm.sourceforge.net/>
It also has the ability to do some keyboard mapping.

More extensive keyboard remapping can be done for the entire Mac via a utility called Ukelele
<http://www.macupdate.com/info.php/id/14495>

Where can I get a terminal emulator that will connect to vt100, and vt220?

Terminal.app, in Preferences > Settings > Advanced > Emulation, has vt52, vt100, vt102, but not vt220.