I've just committed an EGA driver which supports virtual screens and
font loading. Can you try it out?

For now, it is not well integrated - the "vga" driver must be
in the tree at the same time due to some shared code.

Besides the standard "80x50" mode it supports an "80x35" and
an "80x43" mode. For that, an 8x10 resp an 8x8 font must be loaded
before.

/etc/wscons.conf could contain eg:
font    ibm     -       8       ibm     /usr/share/pcvt/fonts/vt220l.808
font    ibm     -       10      ibm     /usr/share/pcvt/fonts/vt220l.810
screen  5       80x35   vt100
screen  6       80x43   vt100


best regards
Matthias