I am going to try and put some time into this starting in Jan., but no
guarantees as to if/when something will be working. (If someone else
is/will be working on this, they are welcome to carry the ball:-)

The manual that has all the junk you need to know in it is the..

VAXstation 2000 and MicroVAX 2000 Technical Manual
DEC part# EK-VTTAA-TM

I've got a copy and might be able to loan parts of it to someone interested
in working on this.

All I have done at this point is coded an as yet untested driver for the
disk controller chip.

Have a good holiday, rick