Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!van-bc!mdavcr!ac
From: ac@mdavcr.UUCP (Alan Chan)
Newsgroups: comp.sys.dec
Subject: Re: DFM32 configuration
Keywords: The dmf32 is a device with what we call a floating address.
Message-ID: <1073@mdavcr.UUCP>
Date: 17 Nov 90 08:59:08 GMT
References: <35830@cup.portal.com>
Distribution: na
Organization: MacDonald Dettwiler, 13800 Commerce Parkway, Richmond, BC, Canada  V6V 2J3
Lines: 20

address switches on the module.  Howeever, on VAXes, the VAX auto-sizes
and assign both the CSR address and the interrupt vector according to
some rules.  Since you removed the DZ11, now the VAX will expect the
DMF32 to be at a different address and vector.  Since you did not
change the address and vector of the DMF32, now the VAX would not 
recognize it as a DMF32, probably thinks it is a DZ11 instead.  Therefore
instead of getting 8 txa ports, now you only getting one tta port.
To find out what the Vax expect the address and vector to be, do the
following under sysgen:

SYSGEN>  config
DEVICE>  DMF32,1             ;telling system you have one DMF32
                             ;now hit a control-Z

	Now system will present out a list of CSR address and vector
address.  This is NOT what the module is set up right now.  This is 
what VMS expects the address to be in order to recognize it as being a
DMF32.  Next you have to find the DMF32 user's guide and set the on
board switches accordingly.  Please send me mail to tell me how you do.