[comp.unix.ultrix] Anyone have >2 DMVs on a Microvax??

miller%mmc1.m2c.org@RELAY.CS.NET (Stephen Miller) (12/23/87)

     Hello,

	 We are attempting to configure a Microvax II as the 
     hub of a wide area network. It had been our intention to
     put several DMV-11 controllers on the machine. They would
     each speak to a DMR-11 controller on a vax at the remote end.
     I have two DMV's working well on the Microvax now. The system is
     running 2.0 Ultrix.
     The trouble comes about when I attempt to configure the third
     controller into the system. At boot time if three controllers are
     ifconfiged in the rc.local, the system will hang when it ifconfigs
     the third device. If I attempt to bring the system up with the
     two working DMV's, then ifconfig the third manually, I get a
     message;'dmv0: can't initialize'.
       DEC support tells me that the 'can't initialize' message
     indicates that the system is trying to run an allocation routine
     on the bus and is unable to find enough resources to successfully
     configure all the devices installed. The bus contains the following
     devices:
	------ CPU -----   My questions are: 
	---8 MEG MEM ---     1) Is anyone out there running with a
	---8 MEG MEM ---        config even close to this? Anyone able
        --- DEQUNA -----        get more than two DMV controllers on a
	---- DMV -------        Qbus?
	-----DMV -------     2) Does BSD 4.(2/3) support the DMV
	---- DMV -------        controller? 
	-----open ------     3) Is there anyone familiar with the driver
	(next bus box)          for this device? Am I correct in
	---open---------        thinking that the device driver is where
	---open---------        the device claims its share of bus
        ---open---------        resources? Is it a possibility to hack
	-----TK50-------        driver to allow several controllers to 
	----open--------        coexist on the same bus?
	----open--------    



   Thanks for any information...

   Steve Miller              Massachusetts Microelectronic Center
   miller%m2c.org@relay.cs.net                harvard!m2c!miller