No full screen in Windows XP console running as Hyper-V guest OS.

I have an old DOS program that runs fine in a console window under native Windows XP. I've setup a shortcut on the XP machines and selected full screen. When the application runs it opens full screen.

Edit: "I have the XP instance in the HYPER-V in fullscreen mode already. That Windows XP desktop fills the entire monitor. However, when I open a console window I can not get that window to use the whole screen like it does on the stand alone XP boxes."

On a Windows 10 box with a Hyper-V instance of Windows XP the application is working just fine however no matter what I've tried it runs in a too-small box. The settings on the shortcut are the same as the ones on the native XP boxes that work.

Any Ideas?