Re: 11/40 misbehaviour

From: RHB (dcs8506_at_bellsouth.net)
Date: 08/06/04

  • Next message: RHB: "Re: 11/40 misbehaviour" 
    Date: 5 Aug 2004 23:18:22 -0700

    On the 11/40 you interleave with jumpers on the memory board
    controllers.

    Using the MM11-U type memory, two contiguously addressed 16K banks
    yield 32K by properly jumpering the M8293 timing board:
                 
            W9 is in and W10 is cut for one of the 16K pair
            and
            W9 is cut and W10 is in for the other 16K pair
            Both interleave memorys shud be cut for the same starting
    address

    To non-interleave:

              W1 is in, W2, W8, W9 and W10 are cut

    Using the MM11-L type memory, two contiguously addressed 8K banks
    yield 16K by properly jumpering the G110 control board using jumpers
    W7 and W8:

        If W7 and W8 are configured in an “X” pattern, they
    are interleave

        If W7 and W8 are straight across to their own post, they are
    non-interleave

    That info is from the book but as I recall it sounds correct.

                 

         

    Eric Smith <eric-no-spam-for-me@brouhaha.com> wrote in message news:<qhzn59kx1n.fsf@ruckus.brouhaha.com>...
    > John Holden <johnh@psych.usyd.edu.au> writes:
    > > Moving memory banks is always a good first test, but beware that most
    > > decently configured systems would interleave the banks, so a straight
    > > meory address swap might just move the error from even to odd words
    > > (16 bits)
    >
    > Memory interleave on an 11/40? How do you configure that? I've only
    > seen them use normal Unibus memory with each memory unit responding to
    > all addresses in a contiguous range.

  • Next message: RHB: "Re: 11/40 misbehaviour"

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