| is the DZQ11 four port async serial card also supported by the
| NetBSD 1.1 serial driver ?

Not that I am aware of.  I have offered to write dz.c and am waiting to
hear back as to whether someone is already working on it.  I believe it
would be much simpler than the dhu.c driver (using the pdma stuff ala
hp300/dca.c). There are a variety of different serial controllers available
for VAXen - I chose to tackle the DH series because I had one and it has
much better performance features over the DZ series.