Robin,
  Sorry I can't help you with docs...but I thought I'd point out that
the embedded controller is DSSI, not SCSI...the ka640 runs NetBSD
nicely (that's what I'm running at home) but you'll need an mscp disk
subsystem.  That sounds like a nice little machine.

        -Dave

On June 4, you wrote:
> Dear All,
> I have just received a 3400 that I intend getting NetBSD going on it.
> I know that it won't support the RF discs imbedded in it but I want
> to try to write the drivers for them.  So:
> 
> I have taken the covers off and what I have got is:
> 
>   M7624-AA KA640-AA  -  The CPU I guess
>   M7621 * 2          -  Memory (2 * 8 MByte)
>   M3119-YA * 2
>   M3106
>   M7559              -  TKQ70 and drive
> 
> I have checked the dssi (SCSI) bus and I have:
> 
>   DSSI-0 RF31
>   DSSI-1 RF30
>   DSSI-2 RF30
> 
> I am after programming notes/manuals for all of the above, including
> the CPU.  My background is PDP-11 and I have very little VAX experience.
> As a result I have no manuals and the like floating about.
> 
> I will be happy to cover any reasonable photocopying costs.
> 
> I believe that I can install an MSCP emulator for SCSI discs that I
> can use to boot this system using the existing NetBSD VAX port.  What
> I need is sufficient for me to develop or mod an existing driver for the
> embeded SCSI controller and add disc support.  Hopefully I can use the
> stuff from the pmax port for this but I need the manuals to check it
> all through.
> 
> Can anybody help?.
> 
> Robin Birch
>