[rescue] SPARCEngine 1E and VME Memory Boards

[Ethan Hawke]

Hey Richard,

Unfortunately that is not how the 1E works. Only one of the special 
memory boards with the custom P2 cable will work.

Do the sun 3e boards use a special cable or just the standard VME bus? 
If standard VME you can map them in manually but they will exist in IO 
(aka obio or "type 1") space and won't be cacheable.

The custom P2 cable carries the remaining signals to detect memory space 
accesses similar to the 'SBus Expansion Connector" on SS1/SS2 to use the 
special SBus memory boards.

Sorry to disappoint,
Ethan

On 5/23/22 17:29, Richard wrote:
> Sadly they are all I have…I was working on the theory that owners of 
> the 3/E would have upgraded to the 4/E without issue.
>
> Much like the 3/260 to 4/260 upgrade I did back in the day. Remove old 
> cpu board insert new COU board, install fresh OS and keep using all 
> the memory boards etc.
>
> Sent from my iPhone
>
>> On 23 May 2022, at 17:11, Plamen Mihaylov 
>> <plamenspam at afterpeople.com> wrote:
>>
>> 
>> Hi Richard,
>>
>> Maybe there is incompatibility between 3E and 1E mem boards when they 
>> are stacked. Do you have 4E60-16 or/and 501-8060 to test ?
>>
>> Best regards,
>> Plamen
>>
>>
>> On Mon, May 23, 2022 at 9:46 AM Richard <ejb at trick-1.net> wrote:
>>
>>     Hi Plamen
>>
>>     Manual indicates that multiple are supported
>>
>>     http://www.bitsavers.org/pdf/sun/sparc/800-8137-02_The_SPARCengine_1E_CPU_Card_Users_Manual_Apr90.pdf
>>
>>     See pages 36 and 37…..
>>
>>     Richard
>>
>>>     On 23 May 2022, at 3:45 pm, Plamen Mihaylov
>>>     <plamenspam at afterpeople.com> wrote:
>>>
>>>     Hi Richard,
>>>
>>>     I don’t sparcengine 1E is designed to handle 2 memory boards.
>>>
>>>
>>>     Best regards,
>>>     Plamen
>>>
>>>     On Monday, May 23, 2022, Richard <ejb at trick-1.net> wrote:
>>>
>>>         Hi folks
>>>
>>>         Looking for some suggestions/guidance or help.
>>>
>>>         I am Looking to add 2x 4Mb Sun 3/E memory boards to the
>>>         SPARCEngine 1E.
>>>
>>>         I do note that these are memory boards from the Sun3/E but
>>>         am of the understanding that they will work.
>>>
>>>         Reading through the SPARCEngine manual I have added the
>>>         jumpers to my schroff Backplane to bridge slot 2 as this is
>>>         empty - the sbus video card occupies the slot.
>>>
>>>         Configuration is
>>>         Slot1: SPARCEngine
>>>         Slot2: jumpered and empty
>>>         Slot3: 4Mb memory bord jumpered for 4-8MB
>>>         Slot4: 4Mb memory bord jumpered for 8-12Mb.
>>>
>>>         Now on post I don’t see the extra 8mb.
>>>
>>>         Anyone got any ideas ? I read something about telling the
>>>         nvram about the VME cards but not familiar with that process
>>>         or how to do so.
>>>
>>>         Thanks in advance
>>>
>>>         Richard
>>>
>>>         Sent from my iPhone
>>>
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