Settings for MSV11-Q

From: John Dundas <dundas_at_its.caltech.edu>
Date: Sat Dec 7 14:33:00 2002

>>John Dundas wrote:
>
>> Anyone have the jumper settings for a 4MB MSV11-QC (M7551-CF) memory
>> board for a PDP-11? I just got one, but don't know how the DIP
>> switches and jumpers should be set. A PDF of the User Guide would be
>> even better, but help or pointers with the jumpers/switches would be
>> great.
>
>Jerome Fine replies:
>
>In general, there should never be a reason to alter the
>jumpers. Since 4 MBytes is the maximum allowed for
>the PDP-11, the hardware would almost always be set
>to use all of the memory. There is probably a bank of
>jumpers for the starting address and a second for the
>ending address. The starting address will probably be
>empty - for zero. The ending address could be full or
>empty. I suggest that if you can't find a manual for the
>settings to just use the board as is. 99.9% of the time,
>I would expect the setting to reflect use of all of the
>memory - if that is what you wish - and I can't really
>understand any other option for 99.9% of the cases.

Based on the MicroNotes, I believe you are correct that the switches are
used to control the starting and ending addresses. The board, as
received, is set to all zero for both. The MicroNote _seems_ to
indicate that the ending address should be set to all 1s. However I'm
wondering if I really need to set the ending address to 4MB - 8KB (for
the I/O page)?

Also, there are quite a few jumpers on the board. They may or may not
be set appropriately. The MicroNote indicates the function of a few of
them, but not nearly all. For example, permit "write wrong parity",
etc.

If anyone has a copy or scan of the original manual, I'd very much
appreciate it.

Thanks,

John
Received on Sat Dec 07 2002 - 14:33:00 GMT