[rescue] Looking for broken IPX system board or chips

[Ethan Hawke]

The contexts are part of the MMU+ chip, not the IU+FPU. Even then, the chip is the same in the SS2/IPX, just configured differently. I'm confident the CPUs are interchangeable.

-Ethan 

On 5 January 2025 3:27:16 am AEDT, Dave McGuire via rescue <rescue at sunhelp.org> wrote:
>
>  Are you certain the pinout etc is the same?  I'd definitely not risk it without hard info like datasheets or a schematic.
>
>  I think if one could drop a 16-context SS2 IU into an IPX, a lot of us would've done it back in the day, but it's not something I've ever heard of.
>
>               -Dave
>
>On 1/4/25 11:18, Ethan Hawke via rescue wrote:
>> There were several compatible CPUs shared among the SS2/IPX systems (LSI, Cypress, Fujitsu and Weitek), the IPX had a slightly downgraded MMU (8 contexts vs 16) but is more or less the same, there shouldn't be any issue swapping CPUs between them.
>> 
>> -Ethan
>> 
>> 
>> On 5 January 2025 2:42:39 am AEDT, Dave McGuire via rescue <rescue at sunhelp.org> wrote:
>> 
>> 
>>     The SS2 and the IPX do not use the same CPU.
>> 
>>     -Dave
>> 
>>     On January 4, 2025 9:57:22 AM Todd Vernon via rescue
>>     <rescue at sunhelp.org> wrote:
>> 
>>         I believe I have a spare SS2 board I bought just to harvest a
>>         PowerUp CPU from and I have the CPU from another SS2 that I put
>>         PowerUp chip into. Not sure they are same as the IPX.
>> 
>>         If you determine they are I could sell you that bundle. Let me know.
>> 
>>         -t
>>         ------------------------------------------------------------------------
>>         Todd Vernon
>>         Entrepreneur | Investor
>>         Email: todd at toddvernon.com
>>         LinkedIn: toddvernon
>>         On Jan 4, 2025 at 5:30 AM -0700, Michael Dombrowski via rescue
>>         <rescue at sunhelp.org>, wrote:
>> 
>>             I gambled and lost on an IPX with a low buy-it-now price:
>>             the three main chips (GPU, Sparc, cache) have all been
>>             pulled and I assume sold for $0.25 of gold. The rest of the
>>             system seems to be in decent shape and I'm loath to just
>>             throw this away. Anyone happen to have these three chips, or
>>             more likely, an otherwise broken IPX system board that I
>>             could harvest them from?
>> 
>>             mike
>>             ------------------------------------------------------------------------
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>> 
>> 
>>     --
>>     Dave McGuire, AK4HZ
>>     New Kensington, PA
>>     ------------------------------------------------------------------------
>>     rescue list - http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
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>> 
>> 
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>
>
>-- 
>Dave McGuire, AK4HZ
>New Kensington, PA
>
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