> ( with vt220 I'd end up with a 80x24 window in the top-left corner
> after running minicom, with xterm-color it would be ok )

And is that really all that surprising?

If tell it you have a VT-220 I don't think it's unreaosnable for it to
assume you have a VT-220.  And VT-220s are 80x24 (or, with a suitable
setting, 132x24).

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