I have finally gotten some spare time, and have focused on getting the
VS3100 SCSI DMA engine running. And it seems to work for me now
on a MicroVAX 3100 anyway :-)

It's quite a bit faster that PIO:
# dd if=/dev/rsd1c of=/dev/null bs=60k count=1000
1000+0 records in
1000+0 records out
61440000 bytes transferred in 111 secs (553513 bytes/sec)
# dd of=/dev/rsd1c if=/dev/zero bs=60k count=1000
1000+0 records in
1000+0 records out
61440000 bytes transferred in 142 secs (432676 bytes/sec)

(on my slow disk)

I would like people to fetch the kernel and test it:
ftp://subzero.campus.luth.se/users/ragge/netbsd

Tell me about success/strange printouts/etc...
The driver do _not_ find the root device at bootup.

I have only tried the SCSI/SCSI boards, but I believe that it would
work on the MFM/SCSI board also.

MicroVAX 2000 is not supported yet, but it is probably easy to get it
running also.

Have fun,

-- Ragge