xcalc doesn't accept keystrokes when displayed in rootless style. This has
been reported to A/UX Engineering. A workaround is to display xcalc in a
rooted window, as you were doing with native X and eXodus.
Instead of this:
xcalc -display <yourmac>:0.0
Use this:
xcalc -display <yourmac>:0.1
The ".1" causes xcalc to be displayed in the rooted monochrome window. In
this style, it seems to work fine. For more information on rooted versus
rootless windows, refer to chapter 1, page 12, of the Apple MacX manual
from the A/UX manual set.
This has been fixed in A/UX 3.0 and MacX 1.2.