[rescue] Sun 3/160 and CADDStation 32 deskside

[Dan Moisa]

It would be an interesting project to make a VME RAM board that uses
simm/dimms.

Dan.

On Thu, Aug 14, 2025, 11:30 Mike Spooner via rescue <rescue at sunhelp.org>
wrote:

> There are base-address DIP switches and also configuration jumpers on the
> 3/1xx memory boards, that you should check.
>
> Also, there is a P2-enable/disable jumper on the 3/160 CPU board.
>
> Both the above are briefly covered in James Birdsall's Sun Hardware FAQ at
> https://www.unix-ag.uni-siegen.de/faqs/SUN-HW-FAQ.html
>
> Regards,
> Mike
>
>
> On 14 August 2025 09:06:39 BST, Romain Dolbeau via rescue <
> rescue at sunhelp.org> wrote:
>
>> Le mer. 13 août 2025 à 20:34, Alan Perry <alanp at snowmoose.com> a écrit :
>>
>>> I have since found that I have a 3/160 memory board to add to the 4M on the 3/160 board I am using in the CADDStation. However it is broken and I am trying to debug it.
>>>
>>
>> Good luck!
>>
>> You probably already found that info, but just in case...
>> The SUN 3/160 itself has some documentation on bitsavers:
>> * schematics: <https://bitsavers.org/pdf/sun/sun3/3-100/Sun-3_160_Schematic_Jun88.pdf>
>> * functionam overview:
>> <https://bitsavers.org/pdf/sun/sun3/3-100/Sun-3_160_Functional_Overview.pdf>
>> The second one calls the CPU board 2060, which also has some documents:
>> * Hardware reference manual:
>> <https://bitsavers.org/pdf/sun/sun3/3-100/800-1370-02_2060_CPU_Hardware_Reference_Manual.pdf>
>> * Engineering manual:
>> <https://bitsavers.org/pdf/sun/sun3/3-100/800-1386-13_2060_CPU_Engineering_Manual.pdf>
>> There's also documents on how to place/configure the board in various
>> VME systems.
>>
>> Unfortunately bitsavers doesn't appear to have documents pertaining to
>> the memory boards themselves.
>>
>> But the CPU board documents clarify that the CPU accesses the memory
>> board via the P2 bus, an extension to VME that Sun wired on the
>> user-defined pins of the VME"s P2 connector and their own P3
>> additional connector.
>> So for the memory board and CPU board to communicate, they need to be
>> placed in appropriate slots of an appropriate VME backplane. And other
>> boards need to be placed in a way that match the requirements not just
>> of the VME bus, but also the P2 bus, to enable use of the P2 and/or
>> avoid conflicts.
>>
>> Cordially,
>>
>> _______________________________________________
> rescue list - http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sunhelp.org/pipermail/rescue_sunhelp.org/attachments/20250814/a90e37cd/attachment.html>