How can I disable video ROM copy on AT&T 6386 WGS?

[karl r barnhardt]

I have an AT&T 6386 WGS 20 MHz PC with a Cardinal 600 video board and a
NEC Multisync II monitor. The video ROM is at paragraphs C000-C7FF. It
also gets copied to E800-EFFF! This ROM code copy seems to happen
automatically on any AT&T 6386 WGS machine. Is there a way I can
disable this code from being copied? I'd like to use E800-EFFF for TSRs
and device drivers via QEMM. With the faster 16 bit video boards
copying the ROM automatically seems, to me, like a waste of memory.

Karl Barnhardt    krb at homxa.ho.att.com